Uninterruptible.java

public class Uninterruptible {

  public static void main(String[] args) throws InterruptedException {
    final Object o1 = new Object(); final Object o2 = new Object();

    Thread t1 = new Thread() {
      public void run() {
        try {
          synchronized(o1) {
            Thread.sleep(1000);
            synchronized(o2) {}
          }
        } catch (InterruptedException e) { System.out.println("t1 interrupted"); }
      }
    };

    Thread t2 = new Thread() {
      public void run() {
        try {
          synchronized(o2) {
            Thread.sleep(1000);
            synchronized(o1) {}
          }
        } catch (InterruptedException e) { System.out.println("t2 interrupted"); }
      }
    };

    t1.start(); t2.start();
    Thread.sleep(2000);
    t1.interrupt(); t2.interrupt();
    t1.join(); t2.join();
  }
}