Java.lang.Thread.isAlive() Method

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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



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