Multiple Threads in Java by Implementing Runnable Interface

class RunnableInterface implements Runnable 
        { 
            Thread t; 
            int i; 
            RunnableInterface() 
               { 
              t=new Thread(this,"Child Thread"); 
              System.out.println("Child Thread is: "+t); 
              t.start(); 
               } 
              public void run() 
                 { 
                          try 
                       { 
                          for(i=1;i<=5;i++) 
                             { 
                           System.out.println("Child Thread:"+i); 
                           t.sleep(500); 
                             } 
                           } 
                                   catch(InterruptedException e) 
                               { 
                                  System.out.println("Child Thread is Interrupted"); 
                               } 
                     } 
       } 
                      class MultipleThreadsRunnableInterface 
                         { 
                            public static void main(String args[]) 
                             { 
                            new RunnableInterface(); 
                            try 
                              { 
                                for(int i=1;i<=5;i++) 
                                    { 
                                       System.out.println("Main Thread :"+i); 
                                       Thread.sleep(1000); 
                                    } 
                                       } 
                                      catch(InterruptedException e) 
                                       { 
                                          System.out.println("Main Thread Interrupted"); 
                                       }    
                                } 
                        }