class ImplementsRunnable implements Runnable {
 
 private int counter = 0;
 
 public void run() {
 counter++;
 System.out.println("ImplementsRunnable : Counter : " + counter);
 }
 }
 
 class ExtendsThread extends Thread {
 
 private int counter = 0;
 
 public void run() {
 counter++;
 System.out.println("ExtendsThread : Counter : " + counter);
 }
 }
 
 public class ThreadVsRunnable {
 
 public static void main(String args[]) throws Exception {
 //Multiple threads share the same object.
 ImplementsRunnable rc = new ImplementsRunnable();
 Thread t1 = new Thread(rc);
 t1.start();
 Thread.sleep(1000); // Waiting for 1 second before starting next thread
 Thread t2 = new Thread(rc);
 t2.start();
 Thread.sleep(1000); // Waiting for 1 second before starting next thread
 Thread t3 = new Thread(rc);
 t3.start();
 
 //Creating new instance for every thread access.
 ExtendsThread tc1 = new ExtendsThread();
 tc1.start();
 Thread.sleep(1000); // Waiting for 1 second before starting next thread
 ExtendsThread tc2 = new ExtendsThread();
 tc2.start();
 Thread.sleep(1000); // Waiting for 1 second before starting next thread
 ExtendsThread tc3 = new ExtendsThread();
 tc3.start();
 }
 }