//: concurrency/AtomicityTest.java // ©2015 MindView LLC: see Copyright.txt import java.util.concurrent.*; public class AtomicityTest implements Runnable { private int i = 0; public int getValue() { return i; } private synchronized void evenIncrement() { i++; i++; } @Override public void run() { while(true) evenIncrement(); } public static void main(String[] args) { ExecutorService exec = Executors.newCachedThreadPool(); AtomicityTest at = new AtomicityTest(); exec.execute(at); while(true) { int val = at.getValue(); if(val % 2 != 0) { System.out.println(val); System.exit(0); } } } } /* Output: 1 *///:~