Java.lang.Thread.isInterrupted() Method

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Description

The java.lang.Thread.isInterrupted() method tests whether this thread has been interrupted. The interrupted status of the thread is unaffected by this method.

A thread interruption ignored because a thread was not alive at the time of the interrupt will be reflected by this method returning false.

Declaration

Following is the declaration for java.lang.Thread.isInterrupted() method

public boolean isInterrupted()

Parameters

NA

Return Value

This method returns true if this thread has been interrupted; false otherwise.

Exception

NA

Example

The following example shows the usage of java.lang.Thread.isInterrupted() method.

package com.tutorialspoint;

import java.lang.*;

public class ThreadDemo implements Runnable {

   Thread t;

   ThreadDemo() {

      t = new Thread(this);
      System.out.println("Executing " + t.getName());
      // this will call run() fucntion
      t.start();
        
      // tests whether this thread has been interrupted
      if (!t.isInterrupted()) {
         t.interrupt();
      }
      // block until other threads finish
      try {  
         t.join();
      } catch(InterruptedException e) {}
   }

   public void run() {
      try {       
         while (true) {
            Thread.sleep(1000);
         }
      } catch (InterruptedException e) {
         System.out.print(t.getName() + " interrupted:");
         System.out.println(e.toString());
      }
   }

   public static void main(String args[]) {
      new ThreadDemo();
      new ThreadDemo();
   }
} 

Let us compile and run the above program, this will produce the following result −

Executing Thread-0
Thread-0 interrupted:java.lang.InterruptedException: sleep interrupted
Executing Thread-1
Thread-1 interrupted:java.lang.InterruptedException: sleep interrupted