I am trying to understand java threads but couldn\'t solve this question on the

Question

I am trying to understand java threads but couldn't solve this question on the exercises. could you please answer and provide an explanation?

For the following Java class, choose the correct thread class: public class Test12 { public static void main(String[] args) { Thread1 t = new Thread1(); t.start(); } }

1) class Thread1 extends Thread { public void run() {}}

2) class Thread1 implements Thread { public void run() {}}

3) class Thread1 implements Runnable { public void run() {}}

4) class Thread1 extends Runnable { public static void run() {}}

Explanation / Answer

public class Test12 {
   public static void main(String[] args) {
       Thread1 t = new Thread1();
       t.start();
   }
}

Answer: 1) class Thread1 extends Thread { public void run() {}}

Explanation:
   To make any class thread:
       a. you need to extends "Thread" class or
       b. you need to implements "Runnable" interface

   But to start a thread, you need "Thread" class object, because "start()" method inside "Thread" class

   So, here we are creating Thread1 Object and calling start() method directly on Thread1 Object,
   so Thread1 must extends Thread class

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