class SyncDemo{
     public static void main(String... args){
          class A implements Runnable{
               public synchronized void run(){
                  display();
               }
              synchronized void display(){
                  for(int i=0;i<5;i++){
                       System.out.print("Hello");
                       try{
                          Thread.sleep(2000);
                       } catch(InterruptedException e){}
                       System.out.println(Thread.currentThread().getName());
                  }
               }
          }
     
          A ob1=new A();
          A ob2=new A();
          Thread ob3=new Thread(ob1,"Saurabh");
          Thread ob4=new Thread(ob2,"Nikhil");
          ob3.start();
          ob4.start();
     }     
}
                                

A  Compilation Fails

B  Hello Saurabh Hello Nikhil ...... Printed in Synchronized way

C  Output is Unpredictable .