Threads : Creating a thread in java using Runnable or Thread

To create a simple thread, we need to following steps:

1.   Write a class and implements Runnable or extends Thread class.
2.  Override run method. (This method is called when we start the thread).

If you extends Thread:

public class SimpleThread extends Thread {

       @Override

       public void run() {

              System.out.println("Simple Thread");

       }

       public static void main(String[] args) {

              new SimpleThread().start();

       }

}

Note: This is not a best practice as it will stop you to inherit other classes.

If you implements Runnable:

public class RunnableThread implements Runnable {

       @Override

       public void run() {

              System.out.println("Runnable Thread.");

       }

       public static void main(String[] args) {

              new Thread(new RunnableThread()).start();

       }

}

Note: Here, we pass the class instance to thread class and remaining things are same.

And it is best practice suggested by experts.