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# Java Examples - Checking a Thread

## Problem Description:

How to check a thread is alive or not?

## Solution:

Following example demonstrates how to check a thread is alive or not by extending Threda class and using currentThread() method.

    public class TwoThreadAlive extends Thread {
       public void run() {
          for (int i = 0; i < 10; i++) {
          printMsg();
       }
    }

    public void printMsg() {
       Thread t = Thread.currentThread();
       String name = t.getName();
       System.out.println("name=" + name);
    }

    public static void main(String[] args) {
       TwoThreadAlive tt = new TwoThreadAlive();
       tt.setName("Thread");
       System.out.println("before start(),
       tt.isAlive()=" + tt.isAlive());
       tt.start();
       System.out.println("just after start(),
       tt.isAlive()=" + tt.isAlive());
       for (int i = 0; i < 10; i++) {
          tt.printMsg();
       }
       System.out.println("The end of main(),
          tt.isAlive()=" + tt.isAlive());
       }
    }

## Result:

The above code sample will produce the following result.

    before start(),tt.isAlive()=false
    just after start(), tt.isAlive()=true
    name=main
    name=main
    name=main
    name=main
    name=main
    name=Thread
    name=Thread
    name=Thread
    name=Thread
    name=Thread
    name=Thread
    name=Thread
    name=main
    name=main
    The end of main().tt.isAlive()=false

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