Author Topic: Using interrupt() to break out of a blocked thread  (Read 14077 times)

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Using interrupt() to break out of a blocked thread
« on: May 26, 2009, 02:51:07 PM »

//: c13:Interrupt.java
// Using interrupt() to break out of a blocked thread.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002

import java.util.*;

class Blocked extends Thread {
  public Blocked() {
    System.out.println("Starting Blocked");
    start();
  }
  public void run() {
    try {
      synchronized(this) {
        wait(); // Blocks
      }
    } catch(InterruptedException e) {
      System.out.println("Interrupted");
    }
    System.out.println("Exiting run()");
  }
}

public class Interrupt {
  static Blocked blocked = new Blocked();
  public static void main(String[] args) {
    new Timer(true).schedule(new TimerTask() {
      public void run() {
        System.out.println("Preparing to interrupt");
        blocked.interrupt();
        blocked = null; // to release it
      }
    }, 2000); // run() after 2000 milliseconds
  }
} ///:~