BAEL-2187 - Adding files for the tutorial related to Java Yield (#5169)

core-java-concurrency/src/main/java/com/baeldung/concurrent/yield/ThreadYield.java

@@ -0,0 +1,17 @@
+package com.baeldung.concurrent.yield;
+
+public class ThreadYield {
+    public static void main(String[] args) {
+        Runnable r = () -> {
+            int counter = 0;
+            while (counter < 2) {
+                System.out.println(Thread.currentThread()
+                    .getName());
+                counter++;
+                Thread.yield();
+            }
+        };
+        new Thread(r).start();
+        new Thread(r).start();
+    }
+}