// concurrent/InterferingTask.java // (c)2017 MindView LLC: see Copyright.txt // We make no guarantees that this code is fit for any purpose. // Visit http://OnJava8.com for more book information. public class InterferingTask implements Runnable { final int id; private static Integer val = 0; public InterferingTask(int id) { this.id = id; } @Override public void run() { for(int i = 0; i < 100; i++) val++; System.out.println(id + " " + Thread.currentThread().getName() + " " + val); } }