BAEL-1041 Caffeine

libraries/src/main/java/com/baeldung/caffeine/DataObject.java

@@ -1,9 +1,13 @@
 package com.baeldung.caffeine;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 final class DataObject {
     private final String data;
 
     private static int objectCounter = 0;
+    private static final Logger log = LoggerFactory.getLogger(DataObject.class);
 
     private DataObject(String data) {
         this.data = data;
@@ -22,7 +26,7 @@ public String toString() {
 
     public static DataObject get(String data) {
         objectCounter++;
-        System.out.println(String.format("Initializing DataObject#%d with data '%s'", objectCounter, data));
+        log.info("Init DataObject#{} with '{}'", objectCounter, data);
         return new DataObject(data);
     }
 }