multithreading Getting started with multithreading Can the same thread run twice?

Example

It was most frequent question that can a same thread can be run twice.

The answer for this is know one thread can run only once .

if you try to run the same thread twice it will execute for the first time but will give error for second time and the error will be IllegalThreadStateException .

example:

public class TestThreadTwice1 extends Thread{  
 public void run(){  
   System.out.println("running...");  
 }  
 public static void main(String args[]){  
  TestThreadTwice1 t1=new TestThreadTwice1();  
  t1.start();  
  t1.start();  
 }  
}  

output:

running
       Exception in thread "main" java.lang.IllegalThreadStateException