University of South-Eastern Norway

Information Technology and Information Systems

Object-oriented programming 2 (OBJ2000)

This is a repo consisting of the programs as featured in the course book Introduction to Java Programming and Data Structures by Y. Daniel Liang. As per usual the "during-chapter" programs will be found with descriptive file names and the "after-chapter" programming exercises, referred to as "section" in the course book will be featured in the list beneath the Objectives-list with descriptive names and hyperlinks to its respective GitHub URL instead.

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Objectives

• To describe objects and classes, and use classes to model objects
• To use UML graphical notation to describe classes and objects
• To demonstrate how to define classes and create objects
• To create objects using constructors
• To define a reference variable using a reference type and access objects via object reference variables
• To access an object's data and methods using the object member access operator (.)
• To define data fields of reference types and assign default values for an object's data fields
• To distinguish between object reference variables and primitive-data-type variables
• To use the Java librery classes Date, Random, and Pont2D
• To distinguish between instance and static variables and methods
• To define private data fields wit appropriate getter and setter methods
• To encapsulate data fields to make classes easy to maintain
• To develop methods with object arguments and differentiate between primitive-type arguments and object-type arguments
• To store and process objects in arrays
• To create immutable objects from immutable classes to protect the contents of the objects
• To determine the scope of variables in the context of a class
• To use the keyword this to refer to the calling object itself Liang, 2020, p. 345¹

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Section classes

The section classes are programming exercises. These come after each chapter instead of during the chapters as the listing classes does. * and ** denotes heightened difficulty according to the course book editors.

Section (programming exercises.)

(To come..)

• 9.1 The Rectangle class
  
• 9.2 The Stock class
  
  • 9.2b Test Class for 9.2
• 9.3 Use the Date class
• 9.4 Use the Random class
• 9.5 Use the GregorianCalendar class
• 9.6 Stopwatch
  
  • 9.6b Test Class for 9.6
• 9.7 The Account class
  
  • 9.7b Test Class for 9.7
• 9.8 The Fan class
  
  • 9.8b Test Class for 9.8
• 9.9 Geometry: n-sided regular polygon
  
  • 9.9b Test Class for 9.9
• 9.10 Algebra: quadratic equations
  
  • 9.10b Test Class for 9.19
• 9.11 Algebra: 2 * 2 linear equations
  
  • 9.11b Test Class for 9.11
• 9.12 Geometry: intersecting point
• 9.13 The Location class

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Comprehensive

Additional tasks...

• There are no `Comprehensive` tasks in Chapter 9. 📖

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Listing

• 9.1 TestCircle
• 9.2 Circle (AlternativeCircle)
• 9.3 TV
• 9.4 TestTV
• 9.5 TestPoint2D
• 9.6 Circle (for CircleWithStaticMembers)
• 9.7 TestCircleWithStaticMembers
• 9.8 Circle (for CircleWithPrivateDataFields)
• 9.9 TestCircleWithPrivateDataFields
• 9.10 TestPassObject
• 9.11 TotalArea

Footnotes

1. Liang, Y. D. (2020). Introduction to Java Programming and Data Structures (12th ed.). Pearson Education. ↩