diff --git a/hexagonal-simple/README.md b/hexagonal-simple/README.md new file mode 100644 index 000000000000..489c56f35534 --- /dev/null +++ b/hexagonal-simple/README.md @@ -0,0 +1,7 @@ +# The Simple way to work with Hexagonal Architecture + + +We divided this application into six maven projects: Domain, Rest, Port, Principal, Persistence, and Hexagonal-Example. Its objective is explicit about that architecture. There are other approaches. The division into six projects is to explain the separation of the responsibilities. + +The API can be called by http://localhost:8080/timesheet +In this resource, there is a call with a post method. diff --git a/hexagonal-simple/domain/pom.xml b/hexagonal-simple/domain/pom.xml new file mode 100644 index 000000000000..286cb4f51c43 --- /dev/null +++ b/hexagonal-simple/domain/pom.xml @@ -0,0 +1,19 @@ + + + 4.0.0 + + hexagonal-example + com.baeldung.hexagonal + 1.0.0 + + domain + + + com.baeldung.hexagonal + ports + ${project.version} + + + \ No newline at end of file diff --git a/hexagonal-simple/domain/src/main/java/com/baeldung/hexagonal/services/TimeSheetService.java b/hexagonal-simple/domain/src/main/java/com/baeldung/hexagonal/services/TimeSheetService.java new file mode 100644 index 000000000000..9e6fda3fe0ec --- /dev/null +++ b/hexagonal-simple/domain/src/main/java/com/baeldung/hexagonal/services/TimeSheetService.java @@ -0,0 +1,38 @@ +package com.baeldung.hexagonal.services; + +import java.time.LocalDateTime; + +import com.baeldung.hexagonal.dtos.TimeSheetDto; +import com.baeldung.hexagonal.exceptions.TimeSheetConflictException; +import com.baeldung.hexagonal.ports.TimeSheetPersistencePort; +import com.baeldung.hexagonal.ports.TimeSheetServicePort; +import com.spencerwi.either.Either; + +public class TimeSheetService implements TimeSheetServicePort { + + + private TimeSheetPersistencePort timeSheetDataBasePort; + + + public TimeSheetService(TimeSheetPersistencePort timeSheetDataBasePort) { + this.timeSheetDataBasePort = timeSheetDataBasePort; + } + + + public Either save(TimeSheetDto dto) { + if(hasUser(dto)) { + dto.setRegisteredAt(LocalDateTime.now()); + return Either.right(timeSheetDataBasePort.save(dto)); + }else { + return Either.left(new TimeSheetConflictException("User not Found")); + } + } + + private boolean hasUser(TimeSheetDto dto) { + return timeSheetDataBasePort.hasUser(dto.getUserId()); + } + + + + +} diff --git a/hexagonal-simple/persistence/pom.xml b/hexagonal-simple/persistence/pom.xml new file mode 100644 index 000000000000..d1c465b3a059 --- /dev/null +++ b/hexagonal-simple/persistence/pom.xml @@ -0,0 +1,40 @@ + + + 4.0.0 + + hexagonal-example + com.baeldung.hexagonal + 1.0.0 + + persistence + + + org.springframework.boot + spring-boot-starter-data-jpa + + + com.baeldung.hexagonal + ports + ${project.version} + + + org.projectlombok + lombok + + + com.h2database + h2 + + + + + + + org.apache.maven.plugins + maven-compiler-plugin + + + + \ No newline at end of file diff --git a/hexagonal-simple/persistence/src/main/java/com/baeldung/hexagonal/database/impl/TimeSheetPersistencePortImpl.java b/hexagonal-simple/persistence/src/main/java/com/baeldung/hexagonal/database/impl/TimeSheetPersistencePortImpl.java new file mode 100644 index 000000000000..beee917e64f8 --- /dev/null +++ b/hexagonal-simple/persistence/src/main/java/com/baeldung/hexagonal/database/impl/TimeSheetPersistencePortImpl.java @@ -0,0 +1,36 @@ +package com.baeldung.hexagonal.database.impl; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.stereotype.Service; + +import com.baeldung.hexagonal.dtos.TimeSheetDto; +import com.baeldung.hexagonal.entities.TimeSheet; +import com.baeldung.hexagonal.ports.TimeSheetPersistencePort; +import com.baeldung.hexagonal.repositories.TimeSheetRepository; +import com.baeldung.hexagonal.repositories.UserRepository; + +@Service +public class TimeSheetPersistencePortImpl implements TimeSheetPersistencePort { + + @Autowired + TimeSheetRepository tRepository; + @Autowired + UserRepository uRepository; + + @Override + public TimeSheetDto save(TimeSheetDto timeSheet) { + TimeSheet entSheet = tRepository.save(TimeSheet.builder().User(uRepository.findById(timeSheet.getUserId()).get()) + .registeredAt(timeSheet.getRegisteredAt()) + .typeRegitry(timeSheet.getRegisterType()).build()); + timeSheet.setId(entSheet.getId()); + return timeSheet; + + } + + @Override + public boolean hasUser(Long id) { + return uRepository.findById(id).isPresent(); + } + + +} diff --git a/hexagonal-simple/persistence/src/main/java/com/baeldung/hexagonal/entities/TimeSheet.java b/hexagonal-simple/persistence/src/main/java/com/baeldung/hexagonal/entities/TimeSheet.java new file mode 100644 index 000000000000..681fdb41c521 --- /dev/null +++ b/hexagonal-simple/persistence/src/main/java/com/baeldung/hexagonal/entities/TimeSheet.java @@ -0,0 +1,33 @@ +package com.baeldung.hexagonal.entities; + +import java.time.LocalDateTime; + +import javax.persistence.Entity; +import javax.persistence.GeneratedValue; +import javax.persistence.GenerationType; +import javax.persistence.Id; +import javax.persistence.JoinColumn; +import javax.persistence.ManyToOne; + +import lombok.Builder; +import lombok.Getter; +import lombok.Setter; + +@Getter +@Setter +@Builder +@Entity +public class TimeSheet { + @Id + @GeneratedValue(strategy = GenerationType.IDENTITY) + private Long id; + @ManyToOne + @JoinColumn(name = "USER_ID", nullable = false) + private User User; + private String typeRegitry; + private LocalDateTime registeredAt; + + + + +} diff --git a/hexagonal-simple/persistence/src/main/java/com/baeldung/hexagonal/entities/User.java b/hexagonal-simple/persistence/src/main/java/com/baeldung/hexagonal/entities/User.java new file mode 100644 index 000000000000..54a73033c03e --- /dev/null +++ b/hexagonal-simple/persistence/src/main/java/com/baeldung/hexagonal/entities/User.java @@ -0,0 +1,18 @@ +package com.baeldung.hexagonal.entities; + +import javax.persistence.Entity; +import javax.persistence.Id; + +import lombok.Getter; +import lombok.Setter; + +@Entity +@Getter +@Setter +public class User { + + @Id + private Long id; + private String name; + +} diff --git a/hexagonal-simple/persistence/src/main/java/com/baeldung/hexagonal/repositories/TimeSheetRepository.java b/hexagonal-simple/persistence/src/main/java/com/baeldung/hexagonal/repositories/TimeSheetRepository.java new file mode 100644 index 000000000000..b041a12b8aa5 --- /dev/null +++ b/hexagonal-simple/persistence/src/main/java/com/baeldung/hexagonal/repositories/TimeSheetRepository.java @@ -0,0 +1,11 @@ +package com.baeldung.hexagonal.repositories; + +import org.springframework.data.jpa.repository.JpaRepository; +import org.springframework.stereotype.Repository; + +import com.baeldung.hexagonal.entities.TimeSheet; + +@Repository +public interface TimeSheetRepository extends JpaRepository { + +} diff --git a/hexagonal-simple/persistence/src/main/java/com/baeldung/hexagonal/repositories/UserRepository.java b/hexagonal-simple/persistence/src/main/java/com/baeldung/hexagonal/repositories/UserRepository.java new file mode 100644 index 000000000000..9607d3de4a1f --- /dev/null +++ b/hexagonal-simple/persistence/src/main/java/com/baeldung/hexagonal/repositories/UserRepository.java @@ -0,0 +1,11 @@ +package com.baeldung.hexagonal.repositories; + +import org.springframework.data.jpa.repository.JpaRepository; +import org.springframework.stereotype.Repository; + +import com.baeldung.hexagonal.entities.User; + +@Repository +public interface UserRepository extends JpaRepository { + +} diff --git a/hexagonal-simple/persistence/src/main/resources/application.properties b/hexagonal-simple/persistence/src/main/resources/application.properties new file mode 100644 index 000000000000..ffe9b592e74b --- /dev/null +++ b/hexagonal-simple/persistence/src/main/resources/application.properties @@ -0,0 +1,8 @@ +spring.datasource.url=jdbc:h2:mem:testdb +spring.datasource.driverClassName=org.h2.Driver +spring.datasource.username=sa +spring.datasource.password=password +spring.jpa.database-platform=org.hibernate.dialect.H2Dialect +spring.jpa.hibernate.ddl-auto = create-drop +spring.jpa.show-sql=true +spring.jpa.properties.hibernate.format_sql=true \ No newline at end of file diff --git a/hexagonal-simple/persistence/src/main/resources/data.sql b/hexagonal-simple/persistence/src/main/resources/data.sql new file mode 100644 index 000000000000..cb30b10e5c88 --- /dev/null +++ b/hexagonal-simple/persistence/src/main/resources/data.sql @@ -0,0 +1 @@ +insert into User (id,name) values (1,'SILVIO GOMES') \ No newline at end of file diff --git a/hexagonal-simple/pom.xml b/hexagonal-simple/pom.xml new file mode 100644 index 000000000000..648b4d80c663 --- /dev/null +++ b/hexagonal-simple/pom.xml @@ -0,0 +1,28 @@ + + + 4.0.0 + + org.springframework.boot + spring-boot-starter-parent + 2.4.3 + + + com.baeldung.hexagonal + hexagonal-example + pom + 1.0.0 + Demo project for hexagonal architecture. This is the principal pom + + 8 + + + + domain + rest + persistence + principal + ports + + + \ No newline at end of file diff --git a/hexagonal-simple/ports/pom.xml b/hexagonal-simple/ports/pom.xml new file mode 100644 index 000000000000..66f709db9f01 --- /dev/null +++ b/hexagonal-simple/ports/pom.xml @@ -0,0 +1,23 @@ + + 4.0.0 + + com.baeldung.hexagonal + hexagonal-example + 1.0.0 + + ports + ports + Adapters to others modules + + + org.projectlombok + lombok + + + com.spencerwi + Either.java + 2.7.0 + + + + \ No newline at end of file diff --git a/hexagonal-simple/ports/src/main/java/com/baeldung/hexagonal/dtos/TimeSheetDto.java b/hexagonal-simple/ports/src/main/java/com/baeldung/hexagonal/dtos/TimeSheetDto.java new file mode 100644 index 000000000000..b15924aaa6c0 --- /dev/null +++ b/hexagonal-simple/ports/src/main/java/com/baeldung/hexagonal/dtos/TimeSheetDto.java @@ -0,0 +1,18 @@ +package com.baeldung.hexagonal.dtos; + +import java.time.LocalDateTime; + +import lombok.Builder; +import lombok.Getter; +import lombok.Setter; + +@Getter +@Setter +@Builder +public class TimeSheetDto { + + private Long id; + private Long userId; + private String registerType; + private LocalDateTime registeredAt; +} \ No newline at end of file diff --git a/hexagonal-simple/ports/src/main/java/com/baeldung/hexagonal/exceptions/TimeSheetConflictException.java b/hexagonal-simple/ports/src/main/java/com/baeldung/hexagonal/exceptions/TimeSheetConflictException.java new file mode 100644 index 000000000000..03e389400e3c --- /dev/null +++ b/hexagonal-simple/ports/src/main/java/com/baeldung/hexagonal/exceptions/TimeSheetConflictException.java @@ -0,0 +1,11 @@ +package com.baeldung.hexagonal.exceptions; + +public class TimeSheetConflictException extends RuntimeException { + + private static final long serialVersionUID = 1L; + + public TimeSheetConflictException(String message) { + super(message); + } + +} diff --git a/hexagonal-simple/ports/src/main/java/com/baeldung/hexagonal/ports/TimeSheetPersistencePort.java b/hexagonal-simple/ports/src/main/java/com/baeldung/hexagonal/ports/TimeSheetPersistencePort.java new file mode 100644 index 000000000000..52172059fe17 --- /dev/null +++ b/hexagonal-simple/ports/src/main/java/com/baeldung/hexagonal/ports/TimeSheetPersistencePort.java @@ -0,0 +1,12 @@ +package com.baeldung.hexagonal.ports; + +import com.baeldung.hexagonal.dtos.TimeSheetDto; + +public interface TimeSheetPersistencePort { + + TimeSheetDto save(TimeSheetDto timeSheet); + boolean hasUser(Long id); + + + +} diff --git a/hexagonal-simple/ports/src/main/java/com/baeldung/hexagonal/ports/TimeSheetServicePort.java b/hexagonal-simple/ports/src/main/java/com/baeldung/hexagonal/ports/TimeSheetServicePort.java new file mode 100644 index 000000000000..56527c753ce6 --- /dev/null +++ b/hexagonal-simple/ports/src/main/java/com/baeldung/hexagonal/ports/TimeSheetServicePort.java @@ -0,0 +1,10 @@ +package com.baeldung.hexagonal.ports; + +import com.baeldung.hexagonal.dtos.TimeSheetDto; +import com.baeldung.hexagonal.exceptions.TimeSheetConflictException; +import com.spencerwi.either.Either; + +public interface TimeSheetServicePort{ + + Either save(TimeSheetDto dto) throws TimeSheetConflictException; +} diff --git a/hexagonal-simple/principal/pom.xml b/hexagonal-simple/principal/pom.xml new file mode 100644 index 000000000000..6bb65c361431 --- /dev/null +++ b/hexagonal-simple/principal/pom.xml @@ -0,0 +1,57 @@ + + + 4.0.0 + + hexagonal-example + com.baeldung.hexagonal + 1.0.0 + + principal + + + com.baeldung.hexagonal + ports + ${project.version} + + + com.baeldung.hexagonal + domain + ${project.version} + + + com.baeldung.hexagonal + rest + ${project.version} + + + com.baeldung.hexagonal + persistence + ${project.version} + + + org.springframework.boot + spring-boot-starter + + + org.springframework.boot + spring-boot-starter-web + + + org.springframework.boot + spring-boot-starter-test + test + + + + + + + org.springframework.boot + spring-boot-maven-plugin + + + + + \ No newline at end of file diff --git a/hexagonal-simple/principal/src/main/java/com/baeldung/hexagonal/TimeSheetApplication.java b/hexagonal-simple/principal/src/main/java/com/baeldung/hexagonal/TimeSheetApplication.java new file mode 100644 index 000000000000..2d295dfd89a0 --- /dev/null +++ b/hexagonal-simple/principal/src/main/java/com/baeldung/hexagonal/TimeSheetApplication.java @@ -0,0 +1,30 @@ +package com.baeldung.hexagonal; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; +import org.springframework.context.annotation.Bean; + +import com.baeldung.hexagonal.database.impl.TimeSheetPersistencePortImpl; +import com.baeldung.hexagonal.ports.TimeSheetPersistencePort; +import com.baeldung.hexagonal.ports.TimeSheetServicePort; +import com.baeldung.hexagonal.services.TimeSheetService; + +@SpringBootApplication +public class TimeSheetApplication { + + public static void main(String[] args) { + SpringApplication.run(TimeSheetApplication.class, args); + } + + + @Bean + public TimeSheetPersistencePort timeSheetPersistencePort(){ + return new TimeSheetPersistencePortImpl(); + } + + @Bean + public TimeSheetServicePort timeSheetService(){ + return new TimeSheetService(timeSheetPersistencePort()); + } + +} diff --git a/hexagonal-simple/principal/src/main/resources/application.properties b/hexagonal-simple/principal/src/main/resources/application.properties new file mode 100644 index 000000000000..e69de29bb2d1 diff --git a/hexagonal-simple/rest/pom.xml b/hexagonal-simple/rest/pom.xml new file mode 100644 index 000000000000..912eaa1e4bcf --- /dev/null +++ b/hexagonal-simple/rest/pom.xml @@ -0,0 +1,30 @@ + + + 4.0.0 + + hexagonal-example + com.baeldung.hexagonal + 1.0.0 + + rest + + + + org.springframework.boot + spring-boot-starter-web + + + com.baeldung.hexagonal + ports + ${project.version} + + + org.springframework.boot + spring-boot-starter-test + test + + + + \ No newline at end of file diff --git a/hexagonal-simple/rest/src/main/java/com/baeldung/hexagonal/controller/ExceptionController.java b/hexagonal-simple/rest/src/main/java/com/baeldung/hexagonal/controller/ExceptionController.java new file mode 100644 index 000000000000..165b919ef9ff --- /dev/null +++ b/hexagonal-simple/rest/src/main/java/com/baeldung/hexagonal/controller/ExceptionController.java @@ -0,0 +1,28 @@ +package com.baeldung.hexagonal.controller; + +import java.util.logging.Logger; + +import org.springframework.http.HttpStatus; +import org.springframework.http.ResponseEntity; +import org.springframework.web.bind.annotation.ControllerAdvice; +import org.springframework.web.bind.annotation.ExceptionHandler; +import org.springframework.web.context.request.WebRequest; +import org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler; + +import com.baeldung.hexagonal.erros.ConflictError; +import com.baeldung.hexagonal.exceptions.TimeSheetConflictException; + +@ControllerAdvice +public class ExceptionController extends ResponseEntityExceptionHandler{ + + private Logger LOG = Logger.getLogger(ExceptionController.class.getName()); + + @ExceptionHandler(value = TimeSheetConflictException.class ) + public ResponseEntity getNotfoundException( TimeSheetConflictException ex, WebRequest request){ + LOG.warning(ex.getMessage()); + return ResponseEntity.status(HttpStatus.CONFLICT).body(ConflictError.builder().code(HttpStatus.CONFLICT.value()) + .message(ex.getMessage()) + .build()); + } + +} \ No newline at end of file diff --git a/hexagonal-simple/rest/src/main/java/com/baeldung/hexagonal/controller/TimeSheetController.java b/hexagonal-simple/rest/src/main/java/com/baeldung/hexagonal/controller/TimeSheetController.java new file mode 100644 index 000000000000..f475c367467f --- /dev/null +++ b/hexagonal-simple/rest/src/main/java/com/baeldung/hexagonal/controller/TimeSheetController.java @@ -0,0 +1,38 @@ +package com.baeldung.hexagonal.controller; + + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.http.HttpStatus; +import org.springframework.http.ResponseEntity; +import org.springframework.web.bind.annotation.PostMapping; +import org.springframework.web.bind.annotation.RequestBody; +import org.springframework.web.bind.annotation.RequestMapping; +import org.springframework.web.bind.annotation.RestController; + +import com.baeldung.hexagonal.dtos.TimeSheetDto; +import com.baeldung.hexagonal.exceptions.TimeSheetConflictException; +import com.baeldung.hexagonal.ports.TimeSheetServicePort; +import com.spencerwi.either.Either; + +@RestController +@RequestMapping("/timesheet") +public class TimeSheetController { + + @Autowired + private TimeSheetServicePort servicePort; + + @PostMapping("/") + public ResponseEntity save(@RequestBody TimeSheetDto timeSheetDto) throws TimeSheetConflictException { + + Either returnSave = servicePort.save(timeSheetDto); + + if(returnSave.isRight()) { + return ResponseEntity.status(HttpStatus.CREATED).body(returnSave.getRight()); + }else { + throw returnSave.getLeft(); + } + + } + + +} diff --git a/hexagonal-simple/rest/src/main/java/com/baeldung/hexagonal/erros/ConflictError.java b/hexagonal-simple/rest/src/main/java/com/baeldung/hexagonal/erros/ConflictError.java new file mode 100644 index 000000000000..37987c73f6f5 --- /dev/null +++ b/hexagonal-simple/rest/src/main/java/com/baeldung/hexagonal/erros/ConflictError.java @@ -0,0 +1,15 @@ +package com.baeldung.hexagonal.erros; + +import lombok.Builder; +import lombok.Getter; +import lombok.Setter; + +@Getter +@Setter +@Builder +public class ConflictError { + + private int code; + private String message; + +} diff --git a/operators-java/.gitignore b/operators-java/.gitignore new file mode 100644 index 000000000000..549e00a2a96f --- /dev/null +++ b/operators-java/.gitignore @@ -0,0 +1,33 @@ +HELP.md +target/ +!.mvn/wrapper/maven-wrapper.jar +!**/src/main/**/target/ +!**/src/test/**/target/ + +### STS ### +.apt_generated +.classpath +.factorypath +.project +.settings +.springBeans +.sts4-cache + +### IntelliJ IDEA ### +.idea +*.iws +*.iml +*.ipr + +### NetBeans ### +/nbproject/private/ +/nbbuild/ +/dist/ +/nbdist/ +/.nb-gradle/ +build/ +!**/src/main/**/build/ +!**/src/test/**/build/ + +### VS Code ### +.vscode/ diff --git a/operators-java/.mvn/wrapper/MavenWrapperDownloader.java b/operators-java/.mvn/wrapper/MavenWrapperDownloader.java new file mode 100644 index 000000000000..e76d1f3241d3 --- /dev/null +++ b/operators-java/.mvn/wrapper/MavenWrapperDownloader.java @@ -0,0 +1,117 @@ +/* + * Copyright 2007-present the original author or authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * https://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +import java.net.*; +import java.io.*; +import java.nio.channels.*; +import java.util.Properties; + +public class MavenWrapperDownloader { + + private static final String WRAPPER_VERSION = "0.5.6"; + /** + * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided. + */ + private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/" + + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar"; + + /** + * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to + * use instead of the default one. + */ + private static final String MAVEN_WRAPPER_PROPERTIES_PATH = + ".mvn/wrapper/maven-wrapper.properties"; + + /** + * Path where the maven-wrapper.jar will be saved to. + */ + private static final String MAVEN_WRAPPER_JAR_PATH = + ".mvn/wrapper/maven-wrapper.jar"; + + /** + * Name of the property which should be used to override the default download url for the wrapper. + */ + private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl"; + + public static void main(String args[]) { + System.out.println("- Downloader started"); + File baseDirectory = new File(args[0]); + System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath()); + + // If the maven-wrapper.properties exists, read it and check if it contains a custom + // wrapperUrl parameter. + File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH); + String url = DEFAULT_DOWNLOAD_URL; + if(mavenWrapperPropertyFile.exists()) { + FileInputStream mavenWrapperPropertyFileInputStream = null; + try { + mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile); + Properties mavenWrapperProperties = new Properties(); + mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream); + url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url); + } catch (IOException e) { + System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'"); + } finally { + try { + if(mavenWrapperPropertyFileInputStream != null) { + mavenWrapperPropertyFileInputStream.close(); + } + } catch (IOException e) { + // Ignore ... + } + } + } + System.out.println("- Downloading from: " + url); + + File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH); + if(!outputFile.getParentFile().exists()) { + if(!outputFile.getParentFile().mkdirs()) { + System.out.println( + "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'"); + } + } + System.out.println("- Downloading to: " + outputFile.getAbsolutePath()); + try { + downloadFileFromURL(url, outputFile); + System.out.println("Done"); + System.exit(0); + } catch (Throwable e) { + System.out.println("- Error downloading"); + e.printStackTrace(); + System.exit(1); + } + } + + private static void downloadFileFromURL(String urlString, File destination) throws Exception { + if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) { + String username = System.getenv("MVNW_USERNAME"); + char[] password = System.getenv("MVNW_PASSWORD").toCharArray(); + Authenticator.setDefault(new Authenticator() { + @Override + protected PasswordAuthentication getPasswordAuthentication() { + return new PasswordAuthentication(username, password); + } + }); + } + URL website = new URL(urlString); + ReadableByteChannel rbc; + rbc = Channels.newChannel(website.openStream()); + FileOutputStream fos = new FileOutputStream(destination); + fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE); + fos.close(); + rbc.close(); + } + +} diff --git a/operators-java/.mvn/wrapper/maven-wrapper.jar b/operators-java/.mvn/wrapper/maven-wrapper.jar new file mode 100644 index 000000000000..2cc7d4a55c0c Binary files /dev/null and b/operators-java/.mvn/wrapper/maven-wrapper.jar differ diff --git a/operators-java/.mvn/wrapper/maven-wrapper.properties b/operators-java/.mvn/wrapper/maven-wrapper.properties new file mode 100644 index 000000000000..a9f1ef87bb24 --- /dev/null +++ b/operators-java/.mvn/wrapper/maven-wrapper.properties @@ -0,0 +1,2 @@ +distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.3/apache-maven-3.8.3-bin.zip +wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar diff --git a/operators-java/mvnw b/operators-java/mvnw new file mode 100644 index 000000000000..a16b5431b4c3 --- /dev/null +++ b/operators-java/mvnw @@ -0,0 +1,310 @@ +#!/bin/sh +# ---------------------------------------------------------------------------- +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# https://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. +# ---------------------------------------------------------------------------- + +# ---------------------------------------------------------------------------- +# Maven Start Up Batch script +# +# Required ENV vars: +# ------------------ +# JAVA_HOME - location of a JDK home dir +# +# Optional ENV vars +# ----------------- +# M2_HOME - location of maven2's installed home dir +# MAVEN_OPTS - parameters passed to the Java VM when running Maven +# e.g. to debug Maven itself, use +# set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000 +# MAVEN_SKIP_RC - flag to disable loading of mavenrc files +# ---------------------------------------------------------------------------- + +if [ -z "$MAVEN_SKIP_RC" ] ; then + + if [ -f /etc/mavenrc ] ; then + . /etc/mavenrc + fi + + if [ -f "$HOME/.mavenrc" ] ; then + . "$HOME/.mavenrc" + fi + +fi + +# OS specific support. $var _must_ be set to either true or false. +cygwin=false; +darwin=false; +mingw=false +case "`uname`" in + CYGWIN*) cygwin=true ;; + MINGW*) mingw=true;; + Darwin*) darwin=true + # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home + # See https://developer.apple.com/library/mac/qa/qa1170/_index.html + if [ -z "$JAVA_HOME" ]; then + if [ -x "/usr/libexec/java_home" ]; then + export JAVA_HOME="`/usr/libexec/java_home`" + else + export JAVA_HOME="/Library/Java/Home" + fi + fi + ;; +esac + +if [ -z "$JAVA_HOME" ] ; then + if [ -r /etc/gentoo-release ] ; then + JAVA_HOME=`java-config --jre-home` + fi +fi + +if [ -z "$M2_HOME" ] ; then + ## resolve links - $0 may be a link to maven's home + PRG="$0" + + # need this for relative symlinks + while [ -h "$PRG" ] ; do + ls=`ls -ld "$PRG"` + link=`expr "$ls" : '.*-> \(.*\)$'` + if expr "$link" : '/.*' > /dev/null; then + PRG="$link" + else + PRG="`dirname "$PRG"`/$link" + fi + done + + saveddir=`pwd` + + M2_HOME=`dirname "$PRG"`/.. + + # make it fully qualified + M2_HOME=`cd "$M2_HOME" && pwd` + + cd "$saveddir" + # echo Using m2 at $M2_HOME +fi + +# For Cygwin, ensure paths are in UNIX format before anything is touched +if $cygwin ; then + [ -n "$M2_HOME" ] && + M2_HOME=`cygpath --unix "$M2_HOME"` + [ -n "$JAVA_HOME" ] && + JAVA_HOME=`cygpath --unix "$JAVA_HOME"` + [ -n "$CLASSPATH" ] && + CLASSPATH=`cygpath --path --unix "$CLASSPATH"` +fi + +# For Mingw, ensure paths are in UNIX format before anything is touched +if $mingw ; then + [ -n "$M2_HOME" ] && + M2_HOME="`(cd "$M2_HOME"; pwd)`" + [ -n "$JAVA_HOME" ] && + JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`" +fi + +if [ -z "$JAVA_HOME" ]; then + javaExecutable="`which javac`" + if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then + # readlink(1) is not available as standard on Solaris 10. + readLink=`which readlink` + if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then + if $darwin ; then + javaHome="`dirname \"$javaExecutable\"`" + javaExecutable="`cd \"$javaHome\" && pwd -P`/javac" + else + javaExecutable="`readlink -f \"$javaExecutable\"`" + fi + javaHome="`dirname \"$javaExecutable\"`" + javaHome=`expr "$javaHome" : '\(.*\)/bin'` + JAVA_HOME="$javaHome" + export JAVA_HOME + fi + fi +fi + +if [ -z "$JAVACMD" ] ; then + if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD="$JAVA_HOME/jre/sh/java" + else + JAVACMD="$JAVA_HOME/bin/java" + fi + else + JAVACMD="`which java`" + fi +fi + +if [ ! -x "$JAVACMD" ] ; then + echo "Error: JAVA_HOME is not defined correctly." >&2 + echo " We cannot execute $JAVACMD" >&2 + exit 1 +fi + +if [ -z "$JAVA_HOME" ] ; then + echo "Warning: JAVA_HOME environment variable is not set." +fi + +CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher + +# traverses directory structure from process work directory to filesystem root +# first directory with .mvn subdirectory is considered project base directory +find_maven_basedir() { + + if [ -z "$1" ] + then + echo "Path not specified to find_maven_basedir" + return 1 + fi + + basedir="$1" + wdir="$1" + while [ "$wdir" != '/' ] ; do + if [ -d "$wdir"/.mvn ] ; then + basedir=$wdir + break + fi + # workaround for JBEAP-8937 (on Solaris 10/Sparc) + if [ -d "${wdir}" ]; then + wdir=`cd "$wdir/.."; pwd` + fi + # end of workaround + done + echo "${basedir}" +} + +# concatenates all lines of a file +concat_lines() { + if [ -f "$1" ]; then + echo "$(tr -s '\n' ' ' < "$1")" + fi +} + +BASE_DIR=`find_maven_basedir "$(pwd)"` +if [ -z "$BASE_DIR" ]; then + exit 1; +fi + +########################################################################################## +# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central +# This allows using the maven wrapper in projects that prohibit checking in binary data. +########################################################################################## +if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then + if [ "$MVNW_VERBOSE" = true ]; then + echo "Found .mvn/wrapper/maven-wrapper.jar" + fi +else + if [ "$MVNW_VERBOSE" = true ]; then + echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..." + fi + if [ -n "$MVNW_REPOURL" ]; then + jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar" + else + jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar" + fi + while IFS="=" read key value; do + case "$key" in (wrapperUrl) jarUrl="$value"; break ;; + esac + done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties" + if [ "$MVNW_VERBOSE" = true ]; then + echo "Downloading from: $jarUrl" + fi + wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" + if $cygwin; then + wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"` + fi + + if command -v wget > /dev/null; then + if [ "$MVNW_VERBOSE" = true ]; then + echo "Found wget ... using wget" + fi + if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then + wget "$jarUrl" -O "$wrapperJarPath" + else + wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath" + fi + elif command -v curl > /dev/null; then + if [ "$MVNW_VERBOSE" = true ]; then + echo "Found curl ... using curl" + fi + if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then + curl -o "$wrapperJarPath" "$jarUrl" -f + else + curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f + fi + + else + if [ "$MVNW_VERBOSE" = true ]; then + echo "Falling back to using Java to download" + fi + javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java" + # For Cygwin, switch paths to Windows format before running javac + if $cygwin; then + javaClass=`cygpath --path --windows "$javaClass"` + fi + if [ -e "$javaClass" ]; then + if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then + if [ "$MVNW_VERBOSE" = true ]; then + echo " - Compiling MavenWrapperDownloader.java ..." + fi + # Compiling the Java class + ("$JAVA_HOME/bin/javac" "$javaClass") + fi + if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then + # Running the downloader + if [ "$MVNW_VERBOSE" = true ]; then + echo " - Running MavenWrapperDownloader.java ..." + fi + ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR") + fi + fi + fi +fi +########################################################################################## +# End of extension +########################################################################################## + +export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"} +if [ "$MVNW_VERBOSE" = true ]; then + echo $MAVEN_PROJECTBASEDIR +fi +MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS" + +# For Cygwin, switch paths to Windows format before running java +if $cygwin; then + [ -n "$M2_HOME" ] && + M2_HOME=`cygpath --path --windows "$M2_HOME"` + [ -n "$JAVA_HOME" ] && + JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"` + [ -n "$CLASSPATH" ] && + CLASSPATH=`cygpath --path --windows "$CLASSPATH"` + [ -n "$MAVEN_PROJECTBASEDIR" ] && + MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"` +fi + +# Provide a "standardized" way to retrieve the CLI args that will +# work with both Windows and non-Windows executions. +MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@" +export MAVEN_CMD_LINE_ARGS + +WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain + +exec "$JAVACMD" \ + $MAVEN_OPTS \ + -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \ + "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \ + ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@" diff --git a/operators-java/mvnw.cmd b/operators-java/mvnw.cmd new file mode 100644 index 000000000000..c8d43372c986 --- /dev/null +++ b/operators-java/mvnw.cmd @@ -0,0 +1,182 @@ +@REM ---------------------------------------------------------------------------- +@REM Licensed to the Apache Software Foundation (ASF) under one +@REM or more contributor license agreements. See the NOTICE file +@REM distributed with this work for additional information +@REM regarding copyright ownership. The ASF licenses this file +@REM to you under the Apache License, Version 2.0 (the +@REM "License"); you may not use this file except in compliance +@REM with the License. You may obtain a copy of the License at +@REM +@REM https://www.apache.org/licenses/LICENSE-2.0 +@REM +@REM Unless required by applicable law or agreed to in writing, +@REM software distributed under the License is distributed on an +@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +@REM KIND, either express or implied. See the License for the +@REM specific language governing permissions and limitations +@REM under the License. +@REM ---------------------------------------------------------------------------- + +@REM ---------------------------------------------------------------------------- +@REM Maven Start Up Batch script +@REM +@REM Required ENV vars: +@REM JAVA_HOME - location of a JDK home dir +@REM +@REM Optional ENV vars +@REM M2_HOME - location of maven2's installed home dir +@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands +@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending +@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven +@REM e.g. to debug Maven itself, use +@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000 +@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files +@REM ---------------------------------------------------------------------------- + +@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on' +@echo off +@REM set title of command window +title %0 +@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on' +@if "%MAVEN_BATCH_ECHO%" == "on" echo %MAVEN_BATCH_ECHO% + +@REM set %HOME% to equivalent of $HOME +if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%") + +@REM Execute a user defined script before this one +if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre +@REM check for pre script, once with legacy .bat ending and once with .cmd ending +if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat" +if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd" +:skipRcPre + +@setlocal + +set ERROR_CODE=0 + +@REM To isolate internal variables from possible post scripts, we use another setlocal +@setlocal + +@REM ==== START VALIDATION ==== +if not "%JAVA_HOME%" == "" goto OkJHome + +echo. +echo Error: JAVA_HOME not found in your environment. >&2 +echo Please set the JAVA_HOME variable in your environment to match the >&2 +echo location of your Java installation. >&2 +echo. +goto error + +:OkJHome +if exist "%JAVA_HOME%\bin\java.exe" goto init + +echo. +echo Error: JAVA_HOME is set to an invalid directory. >&2 +echo JAVA_HOME = "%JAVA_HOME%" >&2 +echo Please set the JAVA_HOME variable in your environment to match the >&2 +echo location of your Java installation. >&2 +echo. +goto error + +@REM ==== END VALIDATION ==== + +:init + +@REM Find the project base dir, i.e. the directory that contains the folder ".mvn". +@REM Fallback to current working directory if not found. + +set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR% +IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir + +set EXEC_DIR=%CD% +set WDIR=%EXEC_DIR% +:findBaseDir +IF EXIST "%WDIR%"\.mvn goto baseDirFound +cd .. +IF "%WDIR%"=="%CD%" goto baseDirNotFound +set WDIR=%CD% +goto findBaseDir + +:baseDirFound +set MAVEN_PROJECTBASEDIR=%WDIR% +cd "%EXEC_DIR%" +goto endDetectBaseDir + +:baseDirNotFound +set MAVEN_PROJECTBASEDIR=%EXEC_DIR% +cd "%EXEC_DIR%" + +:endDetectBaseDir + +IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig + +@setlocal EnableExtensions EnableDelayedExpansion +for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a +@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS% + +:endReadAdditionalConfig + +SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe" +set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar" +set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain + +set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar" + +FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO ( + IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B +) + +@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central +@REM This allows using the maven wrapper in projects that prohibit checking in binary data. +if exist %WRAPPER_JAR% ( + if "%MVNW_VERBOSE%" == "true" ( + echo Found %WRAPPER_JAR% + ) +) else ( + if not "%MVNW_REPOURL%" == "" ( + SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar" + ) + if "%MVNW_VERBOSE%" == "true" ( + echo Couldn't find %WRAPPER_JAR%, downloading it ... + echo Downloading from: %DOWNLOAD_URL% + ) + + powershell -Command "&{"^ + "$webclient = new-object System.Net.WebClient;"^ + "if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^ + "$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^ + "}"^ + "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^ + "}" + if "%MVNW_VERBOSE%" == "true" ( + echo Finished downloading %WRAPPER_JAR% + ) +) +@REM End of extension + +@REM Provide a "standardized" way to retrieve the CLI args that will +@REM work with both Windows and non-Windows executions. +set MAVEN_CMD_LINE_ARGS=%* + +%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %* +if ERRORLEVEL 1 goto error +goto end + +:error +set ERROR_CODE=1 + +:end +@endlocal & set ERROR_CODE=%ERROR_CODE% + +if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost +@REM check for post script, once with legacy .bat ending and once with .cmd ending +if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat" +if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd" +:skipRcPost + +@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on' +if "%MAVEN_BATCH_PAUSE%" == "on" pause + +if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE% + +exit /B %ERROR_CODE% diff --git a/operators-java/pom.xml b/operators-java/pom.xml new file mode 100644 index 000000000000..474227b25641 --- /dev/null +++ b/operators-java/pom.xml @@ -0,0 +1,17 @@ + + + 4.0.0 + + org.springframework.boot + spring-boot-starter-parent + 2.6.1 + + + com.baeldung.operators + operator-java + 0.0.1-SNAPSHOT + operator-java + Demo project for Spring Boot + + diff --git a/operators-java/src/main/java/br/com/baeldung/OperatorJavaApplication.java b/operators-java/src/main/java/br/com/baeldung/OperatorJavaApplication.java new file mode 100644 index 000000000000..9f4255dcf157 --- /dev/null +++ b/operators-java/src/main/java/br/com/baeldung/OperatorJavaApplication.java @@ -0,0 +1,83 @@ +package br.com.baeldung; + +import br.com.baeldung.operators.Arithmetic; +import br.com.baeldung.operators.Assingment; +import br.com.baeldung.operators.BitWiseBitShift; +import br.com.baeldung.operators.Comparison; +import br.com.baeldung.operators.Conditional; +import br.com.baeldung.operators.EqualityAndRelational; +import br.com.baeldung.operators.OtherAssingment; +import br.com.baeldung.operators.Unary; + + +public class OperatorJavaApplication { + + public static void main(String[] args) { + + System.out.println("Using Arithmetic operators"); + Arithmetic.useAdditiveToConcatenation(); + Arithmetic.useAdditiveToArihmeticOperation(); + Arithmetic.subtract(); + Arithmetic.multiply(); + Arithmetic.divide(); + + System.out.println("Using Assingment operators"); + Assingment.assignmentSample(); + + System.out.println("Using BitWise and BitShift operators"); + BitWiseBitShift.useBitwiseAnd(); + BitWiseBitShift.useBitwiseExclusiveOr(); + BitWiseBitShift.useBitwiseInclusiveOr(); + BitWiseBitShift.useSignedLeftShift(); + BitWiseBitShift.useSignedRightShift(); + BitWiseBitShift.useUnaryBitWiseComplement(); + BitWiseBitShift.useUnsignedRightShift(); + + + System.out.println("Using Comparison operators"); + Comparison.verifyIfAirplaneIsAnInstanceOfCar(); + Comparison.verifyIfAirplaneIsAnInstanceOfTransport(); + Comparison.verifyIfCarIsAnInstanceOfTransport(); + Comparison.verifyTransportInstanceAsAirplane(); + Comparison.verifyTransportInstanceAsAirplaneButInstantiatedAsCar(); + Comparison.verifyTransportInstanceAsCar(); + Comparison.verifyTransportInstanceAsCarButInstantiatedAsAirplane(); + + System.out.println("Using Conditional operators"); + Conditional.verifyIfUserIsOfTheFamilyOrAFriend(true, true); + Conditional.verifyIfUserIsOfTheFamilyOrAFriend(true, false); + Conditional.verifyIfUserIsOfTheFamilyOrAFriend(false, true); + Conditional.verifyIfUserIsOfTheFamilyOrAFriend(false, false); + + Conditional.verifyIfUserIsOfTheFamilyOrAFriendUsingTernary(false, false); + Conditional.verifyIfUserIsOfTheFamilyOrAFriendUsingTernary(true, true); + Conditional.verifyIfUserIsOfTheFamilyOrAFriendUsingTernary(false, true); + Conditional.verifyIfUserIsOfTheFamilyOrAFriendUsingTernary(true, false); + + Conditional.verifyIfUserIsOver18AndMan(14, false); + Conditional.verifyIfUserIsOver18AndMan(14, true); + Conditional.verifyIfUserIsOver18AndMan(20, false); + Conditional.verifyIfUserIsOver18AndMan(21, true); + + System.out.println("Using Euqality and Relational operators"); + EqualityAndRelational.testEqualTo(); + EqualityAndRelational.testGreaterThan(); + EqualityAndRelational.testGreaterThanOrEqualTo(); + EqualityAndRelational.testGreaterThanOrEqualTo(); + EqualityAndRelational.testLessThan(); + EqualityAndRelational.testLessThanOrEqualTo(); + EqualityAndRelational.testNotEqualTo(); + + System.out.println("Using Unary operators"); + Unary.changeBooleanValue(); + Unary.changePositiveToNegative(); + Unary.decrement_1(); + Unary.increment_1(); + Unary.showPositive(); + + + System.out.println("Using Other Assingment operators"); + OtherAssingment.useOtherOperators(); + } + +} diff --git a/operators-java/src/main/java/br/com/baeldung/model/Airplane.java b/operators-java/src/main/java/br/com/baeldung/model/Airplane.java new file mode 100644 index 000000000000..832ef76f78aa --- /dev/null +++ b/operators-java/src/main/java/br/com/baeldung/model/Airplane.java @@ -0,0 +1,19 @@ +package br.com.baeldung.model; + +public class Airplane extends Transport { + + @Override + public String getType() { + return "air"; + } + + @Override + public String getName() { + return "arplane"; + } + + public boolean isPrivate() { + return false; + } + +} diff --git a/operators-java/src/main/java/br/com/baeldung/model/Car.java b/operators-java/src/main/java/br/com/baeldung/model/Car.java new file mode 100644 index 000000000000..342c793b8045 --- /dev/null +++ b/operators-java/src/main/java/br/com/baeldung/model/Car.java @@ -0,0 +1,19 @@ +package br.com.baeldung.model; + +public class Car extends Transport { + + @Override + public String getType() { + return "terrestrial"; + } + + @Override + public String getName() { + return "car"; + } + + public boolean hasAirBag() { + return false; + } + +} diff --git a/operators-java/src/main/java/br/com/baeldung/model/Transport.java b/operators-java/src/main/java/br/com/baeldung/model/Transport.java new file mode 100644 index 000000000000..3fdad133052f --- /dev/null +++ b/operators-java/src/main/java/br/com/baeldung/model/Transport.java @@ -0,0 +1,18 @@ +package br.com.baeldung.model; + +public abstract class Transport { + + private boolean available; + + public abstract String getType(); + public abstract String getName(); + + public boolean isAvailable(){ + return available; + } + + public void setAvailable(boolean available) { + this.available = available; + } + +} diff --git a/operators-java/src/main/java/br/com/baeldung/operators/Arithmetic.java b/operators-java/src/main/java/br/com/baeldung/operators/Arithmetic.java new file mode 100644 index 000000000000..9f938b1ca5c8 --- /dev/null +++ b/operators-java/src/main/java/br/com/baeldung/operators/Arithmetic.java @@ -0,0 +1,52 @@ +package br.com.baeldung.operators; + +public class Arithmetic { + + public static void useAdditiveToConcatenation() { + String salutation = "Hello"; + String person = "John"; + String exclamationMark="!"; + String space = " "; + + System.out.println("Sentence: " + salutation + space + person + space + exclamationMark); + } + + public static void useAdditiveToArihmeticOperation() { + int number1 = 10; + int number2 = 5; + + System.out.println(number1 + number2); + } + + public static void subtract() { + int number1 = 10; + int number2 = 5; + + System.out.println(number1 - number2); + } + + public static void multiply() { + int number1 = 10; + int number2 = 5; + + System.out.println(number1 * number2); + } + + public static void divide() { + int number1 = 10; + int number2 = 5; + + System.out.println(number1 / number2); + } + + public static void calculateTheRemainder () { + int number1 = 10; + int number2 = 5; + + System.out.println(number1 % number2); + + int number3 = 7; + + System.out.println(number1 % number3); + } +} diff --git a/operators-java/src/main/java/br/com/baeldung/operators/Assingment.java b/operators-java/src/main/java/br/com/baeldung/operators/Assingment.java new file mode 100644 index 000000000000..afa77b486d71 --- /dev/null +++ b/operators-java/src/main/java/br/com/baeldung/operators/Assingment.java @@ -0,0 +1,14 @@ +package br.com.baeldung.operators; + +public class Assingment { + + public static void assignmentSample() { + int number1 = 10; + //The variable number1 has 10 as its value. + System.out.println(number1); + + int number2 = number1; + //The variable number2 has the value of the variable number as its value. + System.out.println(number2); +; } +} diff --git a/operators-java/src/main/java/br/com/baeldung/operators/BitWiseBitShift.java b/operators-java/src/main/java/br/com/baeldung/operators/BitWiseBitShift.java new file mode 100644 index 000000000000..bbe6fb90d805 --- /dev/null +++ b/operators-java/src/main/java/br/com/baeldung/operators/BitWiseBitShift.java @@ -0,0 +1,82 @@ +package br.com.baeldung.operators; + +public class BitWiseBitShift { + + public static void useUnaryBitWiseComplement() { + //it modifies the values of the binary, changing zero by one, and one by zero + int var1 = 35; + System.out.println(getStringInBinary(var1)); + System.out.println(getStringInBinary(~var1)); + } + + public static void useSignedLeftShift() { + //it cut the first N ("variable << N") binary and add N zero or N one in the end of the binary. + int var1 = -36; + System.out.println(getStringInBinary(var1)); + System.out.println(getStringInBinary(var1 << 1)); + } + + public static void useSignedRightShift() { + //it cut the last N ("variable >> N") binary and add N zero or N one in the begin of the binary. + //But the negative value was changed to a negative value also + int var1 = -36; + System.out.println(getStringInBinary(var1)); + int var2 = var1 >> 1; + System.out.println(getStringInBinary(var2)); + //The new value is a negative value also + System.out.println(var2); + } + + public static void useUnsignedRightShift() { + //it cut the last N ("variable >> N") binary and add N zero or N one in the begin of the binary. + //But, this operator can change positve to negative number. + int var1 = -36; + System.out.println(getStringInBinary(var1)); + int var2 = var1 >>> 1; + System.out.println(getStringInBinary(var2)); + //The nevative value was changed to a positive value + System.out.println(var2); + } + + public static void useBitwiseAnd() { + //it compare both values in the binary level, bit by bit. + //If the compared bits are 1, then the new bit will be 1, else the new bit will be 0 + int var1 = 36; + int var2 = 33; + System.out.println(getStringInBinary(var1)); + System.out.println(getStringInBinary(var2)); + System.out.println(getStringInBinary(var1 & var2)); + } + + public static void useBitwiseExclusiveOr() { + //it compare both values in the binary level, bit by bit. + //If the compared bits are equals, then the new bit will be 0, else the new bit will be 1 + int var1 = 36; + int var2 = 33; + System.out.println(getStringInBinary(var1)); + System.out.println(getStringInBinary(var2)); + System.out.println(getStringInBinary(var1 ^ var2)); + } + + public static void useBitwiseInclusiveOr() { + //it compare both values in the binary level, bit by bit. + //If some of both bits is 1, then the new bit will be 1, else the new bit will be 0 + int var1 = 36; + int var2 = 33; + System.out.println(getStringInBinary(var1)); + System.out.println(getStringInBinary(var2)); + System.out.println(getStringInBinary(var1 | var2)); + } + + + + + + private static String getStringInBinary(int value) { + + String binaryRoot = String.format("%8s",Integer.toBinaryString(value)).replaceAll(" ", "0"); + return binaryRoot.substring(binaryRoot.length() - 8); + } + + +} diff --git a/operators-java/src/main/java/br/com/baeldung/operators/Comparison.java b/operators-java/src/main/java/br/com/baeldung/operators/Comparison.java new file mode 100644 index 000000000000..224834f79389 --- /dev/null +++ b/operators-java/src/main/java/br/com/baeldung/operators/Comparison.java @@ -0,0 +1,53 @@ +package br.com.baeldung.operators; + +import br.com.baeldung.model.Airplane; +import br.com.baeldung.model.Car; +import br.com.baeldung.model.Transport; + +public class Comparison { + + public static void verifyIfCarIsAnInstanceOfTransport() { + Object car = new Car(); + //It will return true, because Car is a class of the type Transport. + System.out.println(car instanceof Transport); + } + + public static void verifyIfAirplaneIsAnInstanceOfTransport() { + Object airplane = new Airplane(); + //It will return true, because Airplane is a class of the type Transport. + System.out.println(airplane instanceof Transport); + } + + public static void verifyIfAirplaneIsAnInstanceOfCar() { + + Object airplane = new Airplane(); + //It will return false. Although Car and Airplane extend Transport, they are different classes. + System.out.println(airplane instanceof Car); + } + + public static void verifyTransportInstanceAsAirplane() { + Transport transport = new Airplane(); + //It will return true, because Airplane is a class of the type Transport. + System.out.println(transport instanceof Airplane); + } + + public static void verifyTransportInstanceAsCar() { + Transport transport = new Car(); + //It will return true, because Car is a class of the type Transport. + System.out.println(transport instanceof Car); + } + + public static void verifyTransportInstanceAsCarButInstantiatedAsAirplane() { + Transport transport = new Airplane(); + //It will return false, because Car and Airplane are different class. + System.out.println(transport instanceof Car); + } + + + public static void verifyTransportInstanceAsAirplaneButInstantiatedAsCar() { + Transport transport = new Car(); + //It will return false, because Car and Airplane are different class. + System.out.println(transport instanceof Airplane); + } + +} diff --git a/operators-java/src/main/java/br/com/baeldung/operators/Conditional.java b/operators-java/src/main/java/br/com/baeldung/operators/Conditional.java new file mode 100644 index 000000000000..bc0603a12c2c --- /dev/null +++ b/operators-java/src/main/java/br/com/baeldung/operators/Conditional.java @@ -0,0 +1,49 @@ +package br.com.baeldung.operators; + +public class Conditional { + + public static void verifyIfUserIsOver18AndMan(int years, boolean man) { + + int eighteen = 18; + //man is a boolean variable, so to write "&& man" is the same to write "&& man == true" + System.out.println(eighteen <= years && man); + + // the same of the last, but, now, in a if: + if(eighteen <= years && man) { + System.out.println("make something because the user is man and over 18"); + }else { + //maybe the user is woman or under 18 + System.out.println("make other something because the user isn't man and over 18"); + } + + } + + public static void verifyIfUserIsOfTheFamilyOrAFriend(boolean family, boolean friend) { + + + //family and friend are boolean variables, so write "family || friend" is the same to write "family == true || friend == true" + System.out.println(family || friend); + // the same of the last, but, now, in a if + String message = ""; + if(family || friend) { + message = "make something because the user is of the family or a friend "; + }else { + //The user isn't of the family and he isn't a friend. So, the user is a stranger + message = "make other something because the user is a stranger"; + } + + System.out.println(message); + + } + + public static void verifyIfUserIsOfTheFamilyOrAFriendUsingTernary(boolean family, boolean friend) { + + + //it is the same of the last method, but, now we are using the ternary + String message = (family || friend) ? "make something because the user is of the family or a friend " : "make something because the user is of the family or a friend "; + System.out.println(message); + + } + + +} diff --git a/operators-java/src/main/java/br/com/baeldung/operators/EqualityAndRelational.java b/operators-java/src/main/java/br/com/baeldung/operators/EqualityAndRelational.java new file mode 100644 index 000000000000..dd98101179c1 --- /dev/null +++ b/operators-java/src/main/java/br/com/baeldung/operators/EqualityAndRelational.java @@ -0,0 +1,89 @@ +package br.com.baeldung.operators; + +public class EqualityAndRelational { + + public static void testEqualTo() { + int number1 = 10; + int number2 = 5; + + System.out.println(number1 == number2); + + //testing decision + if(number1 == number2) { + System.out.println("make something..."); + }else { + System.out.println("make other something"); + } + } + + public static void testNotEqualTo() { + int number1 = 10; + int number2 = 5; + + System.out.println(number1 != number2); + + //testing decision + if(number1 != number2) { + System.out.println("make something..."); + }else { + System.out.println("make other something"); + } + } + + public static void testGreaterThan() { + int number1 = 10; + int number2 = 5; + + System.out.println(number1 > number2); + + //testing decision + if(number1 > number2) { + System.out.println("make something..."); + }else { + System.out.println("make other something"); + } + } + + public static void testGreaterThanOrEqualTo() { + int number1 = 10; + int number2 = 5; + + System.out.println(number1 >= number2); + + //testing decision + if(number1 >= number2) { + System.out.println("make something..."); + }else { + System.out.println("make other something"); + } + } + + public static void testLessThan() { + int number1 = 10; + int number2 = 5; + + System.out.println(number1 < number2); + + //testing decision + if(number1 < number2) { + System.out.println("make something..."); + }else { + System.out.println("make other something"); + } + } + + public static void testLessThanOrEqualTo() { + int number1 = 10; + int number2 = 5; + + System.out.println(number1 <= number2); + + //testing decision + if(number1 <= number2) { + System.out.println("make something..."); + }else { + System.out.println("make other something"); + } + } + +} diff --git a/operators-java/src/main/java/br/com/baeldung/operators/OtherAssingment.java b/operators-java/src/main/java/br/com/baeldung/operators/OtherAssingment.java new file mode 100644 index 000000000000..e131b32ff3ad --- /dev/null +++ b/operators-java/src/main/java/br/com/baeldung/operators/OtherAssingment.java @@ -0,0 +1,69 @@ +package br.com.baeldung.operators; + +public class OtherAssingment { + + public static void useOtherOperators() { + + // "variable1 += number" is the same as "variable1 = variable1 + number" + int var1 = 5; + var1 += 10; + // it is the same as "var1 = var1 + 5" + System.out.println(var1); + + // "variable2 -= number" is the same as "variable2 = variable2 - number" + int var2 = 10; + var2 -= 5; + // it is the same of "var2 = var2 - 5" + System.out.println(var2); + + // "variable3 *= number" is the same as "variable3 = variable3 * number" + int var3 = 2; + var3 *= 5; + // it is the same as "var3 = var3 * 5" + System.out.println(var3); + + // "variable4 /= number" is the same as variable4 = variable4 / number + int var4 = 10; + var4 /= 5; + // it is the same as "var4 = var4 / 5" + System.out.println(var4); + + // "variable5 %= number" is the same as "variable5 = variable5 % number" + int var5 = 10; + var5 %= 7; + // it is the same as "var5 = var5 % 7" + System.out.println(var5); + + // "variable6 <<= number" is the same as "variable6 = variable6 << number" + int var6 = 10; + var6 <<= 7; + // it is the same as "var6 = var6 << 7" + System.out.println(var6); + + // "variable7 >>= number" is the same as "variable7 = variable7 << number" + int var7 = 10; + var7 >>= 7; + // it is the same as "var7 = var7 >> 7" + System.out.println(var7); + + // "variable8 ^= number" is the same as "variable8 = variable8 ^ number" + int var8 = 10; + var8 ^= 7; + // it is the same as "var8 = var8 ^ 7" + System.out.println(var8); + + // "variable9 &= number" is the same as "variable9 = variable9 & number" + int var9 = 10; + var9 &= 7; + // it is the same as "var9 = var9 & 7" + System.out.println(var9); + + // "variable10 |= number" is the same as "variable10 = variable10 | number" + int var10 = 10; + var10 |= 7; + // it is the same as "var10 = var10 | 7" + System.out.println(var10); + + } + +} diff --git a/operators-java/src/main/java/br/com/baeldung/operators/Unary.java b/operators-java/src/main/java/br/com/baeldung/operators/Unary.java new file mode 100644 index 000000000000..ce3b5e3b599e --- /dev/null +++ b/operators-java/src/main/java/br/com/baeldung/operators/Unary.java @@ -0,0 +1,42 @@ +package br.com.baeldung.operators; + +public class Unary { + + public static void changePositiveToNegative() { + int number1 = 10; + int number2 = 5; + int positive = number2 + number1; + System.out.println("Positive value"); + System.out.println(positive); + System.out.println("Positive value changed to negative value"); + System.out.println(- positive); + } + + public static void showPositive() { + int number = + 10; + System.out.println(number); + + } + + public static void increment_1() { + int number = 10; + number++; + System.out.println(number); + + } + + public static void decrement_1() { + int number = 10; + number--; + System.out.println(number); + + } + + public static void changeBooleanValue() { + boolean forbidden = true; + System.out.println(!forbidden); + + } + + +} diff --git a/operators-java/src/main/resources/application.properties b/operators-java/src/main/resources/application.properties new file mode 100644 index 000000000000..8b137891791f --- /dev/null +++ b/operators-java/src/main/resources/application.properties @@ -0,0 +1 @@ +