Java.lang.Thread.isAlive() Method

---

Description

The java.lang.Thread.isAlive() method tests if this thread is alive. A thread is alive if it has been started and has not yet died.

Declaration

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

public final boolean isAlive()

Parameters

NA

Return Value

This method returns true if this thread is alive, false otherwise.

Exception

NA

Example

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

package com.tutorialspoint;

import java.lang.*;

public class ThreadDemo implements Runnable {

   public void run() {
   
      Thread t = Thread.currentThread();
      // tests if this thread is alive
      System.out.println("status = " + t.isAlive());
   }

   public static void main(String args[]) throws Exception {

      Thread t = new Thread(new ThreadDemo());
   
      // this will call run() function
      t.start();
   
      // waits for this thread to die
      t.join();
   
      // tests if this thread is alive
      System.out.println("status = " + t.isAlive());
   }
} 

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

status = true
status = false