Java Tutorial/Thread/Suspend resume

Interrupt a thread.

   <source lang="java">

class MyThread implements Runnable {

 public void run() {
   try {
     Thread.sleep(30000);
     for (int i = 1; i < 10; i++) {
       if (Thread.interrupted()) {
         System.out.println("interrupted.");
         break;
       }
     }
   } catch (Exception exc) {
     System.out.println(Thread.currentThread().getName() + " interrupted.");
   }
   System.out.println(Thread.currentThread().getName() + " exiting.");
 }

} public class Main {

 public static void main(String args[]) throws Exception {
   Thread thrd = new Thread(new MyThread(), "MyThread #1");
   Thread thrd2 = new Thread(new MyThread(), "MyThread #2");
   thrd.start();
   Thread.sleep(100);
   thrd.interrupt();
   thrd2.start();
   Thread.sleep(400);
   thrd2.interrupt();
 }

}</source>

Suspending and resuming a thread the modern way.

   <source lang="java">

class NewThread implements Runnable {

 String name;
 Thread t;
 boolean suspendFlag;
 NewThread(String threadname) {
   name = threadname;
   t = new Thread(this, name);
   System.out.println("New thread: " + t);
   suspendFlag = false;
   t.start();
 }
 public void run() {
   try {
     for (int i = 15; i > 0; i--) {
       System.out.println(name + ": " + i);
       Thread.sleep(200);
       synchronized (this) {
         while (suspendFlag) {
           wait();
         }
       }
     }
   } catch (InterruptedException e) {
     System.out.println(name + " interrupted.");
   }
   System.out.println(name + " exiting.");
 }
 void mysuspend() {
   suspendFlag = true;
 }
 synchronized void myresume() {
   suspendFlag = false;
   notify();
 }

} class SuspendResume {

 public static void main(String args[]) {
   NewThread ob1 = new NewThread("One");
   NewThread ob2 = new NewThread("Two");
   try {
     Thread.sleep(1000);
     ob1.mysuspend();
     System.out.println("Suspending thread One");
     Thread.sleep(1000);
     ob1.myresume();
     System.out.println("Resuming thread One");
     ob2.mysuspend();
     System.out.println("Suspending thread Two");
     Thread.sleep(1000);
     ob2.myresume();
     System.out.println("Resuming thread Two");
   } catch (InterruptedException e) {
     System.out.println("Main thread Interrupted");
   }
   try {
     System.out.println("Waiting for threads to finish.");
     ob1.t.join();
     ob2.t.join();
   } catch (InterruptedException e) {
     System.out.println("Main thread Interrupted");
   }
   System.out.println("Main thread exiting.");
 }

}</source>