Can we start a thread twice?

/**
 * This program is used to show that we can not start
 * a thread which is already started.
 * @author w3schools
 */
class Test extends Thread{
	public void run(){
		System.out.println("thread started.");
	}
}
 
public class ThreadExample {
	public static void main(String args[]){
		//creating thread.
		Test thrd = new Test();
 
		//start the thread.
		thrd.start();
 
		//again start the thread which is already started.
		//IllegalThreadStateException here.
		thrd.start();
	}
}

/** * This program is used to show that we can not start * a thread which is already started. * @author w3schools */ class Test extends Thread{ public void run(){ System.out.println("thread started."); } } public class ThreadExample { public static void main(String args[]){ //creating thread. Test thrd = new Test(); //start the thread. thrd.start(); //again start the thread which is already started. //IllegalThreadStateException here. thrd.start(); } }

Exception in thread "main" thread started.
java.lang.IllegalThreadStateException
at java.lang.Thread.start(Unknown Source)
at com.w3schools.business.ThreadExample.main
(ThreadExample.java:24)

Exception in thread "main" thread started. java.lang.IllegalThreadStateException at java.lang.Thread.start(Unknown Source) at com.w3schools.business.ThreadExample.main (ThreadExample.java:24)