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How to implement Thread in Java?

There are two ways of implementing threading in Java

1) By extending java.lang.Thread class, or

2) By implementing java.lang.Runnable interface.

mythread.start();

mythread.start(); //this line will throw IllegalThreadStateException

 

 

//implementing Thread by extending Thread class

 public class MyThread extends Thread{      

 

   public void run(){

      System.out.println(" Thread Running " + Thread.currentThread().getName());

   }

 }

 

 

//implementing Thread by implementing Runnable interface

 

public class MyRunnable implements Runnable{        

 

    public void run(){

       System.out.println(" Create Thread " + Thread.currentThread().getName());

    }

 

 }

 

 

//starting Thread in Java

Thread mythread = new MyThread(); //Thread created not started

mythread.setName("T1");

Thread myrunnable = new Thread(new MyRunnable(),"T2"); //Thread created      

 

mythread.start(); //Thread started now but not running

myrunnable.start();

 

 

Actually public void run () method is defined in Runnable interface and since java.lang.Thread class implements Runnable interface it gets this method automatically.

 

Thread will not start until you call the start() method of java.lang.Thread class. When we call start () method Java Virtual machine execute run () method of that Thread class into separate Thread other than calling thread

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