Add AtomicInteger.set() and .lazySet() usage example (#12099)

core-java-modules/core-java-concurrency-advanced-4/src/main/java/com/baeldung/setvslazyset/Application.java

@@ -0,0 +1,35 @@
+package com.baeldung.setvslazyset;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class Application {
+
+    AtomicInteger atomic = new AtomicInteger(0);
+
+    public static void main(String[] args) {
+        Application app = new Application();
+        new Thread(() -> {
+            for (int i = 0; i < 10; i++) {
+                //app.atomic.set(i);
+                app.atomic.lazySet(i);
+                System.out.println("Set: " + i);
+                try {
+                    Thread.sleep(100);
+                } catch (InterruptedException e) {}
+            }
+        }).start();
+
+        new Thread(() -> {
+            for (int i = 0; i < 10; i++) {
+                synchronized (app.atomic) {
+                    int counter = app.atomic.get();
+                    System.out.println("Get: " + counter);
+                }
+                try {
+                    Thread.sleep(100);
+                } catch (InterruptedException e) {}
+            }
+        }).start();
+    }
+
+}