Question

I have developed a code that will start two threads upon executing

public class MyThread1 extends Thread //extend thread class 
{
    // public  synchronized void run()
     //synchronized (this)

     public   void run()
    {//synchronized(this)
        //{
         for(int i=0;i<20;++i) {
             try{
                 Thread.sleep(500);


          System.out.print(i +"\n"+ "..");
             }catch(Exception e)
             {e.printStackTrace();}
          //} 
        }

     }  

 public static void main(String... a) 
 {
     MyThread1 t = new MyThread1();

     Thread x = new Thread(t);

     Thread y = new Thread(t);
     x.start();
     y.start();

     }

Now it starts both the threads but what if I want to stop a particular thread, lets say I want to stop Thread Y then How I will do it please advise since stopping a thread means that it’s run method is completed but I want to stop it forcefully how I will do this, please advise

Answer 1

You should interrupt() the thread. Blocking calls (like sleep()) will throw an InterruptedException when the thread is interrupted. If you want to stop as fast as possible while in a tight loop, regularly check is the current thread has been interrupted using the isInterrupted() method.

More information about this in the Java concurrency tutorial.