PROGRAM TO PRINT MULTIPLE THREADS AT DIFFERENT INTERVALS..

  import java.util.concurrent.Executors;
import java.util.concurrent.ExecutorService;

public class RunnableTester
{
  public static void main( String[] args )
  {
     // create and name each runnable          
     PrintTask task1 = new PrintTask( "thread1" );
     PrintTask task2 = new PrintTask( "thread2" );
     PrintTask task3 = new PrintTask( "thread3" );
     
     System.out.println( "Starting threads" );
     
     // create ExecutorService to manage threads                      
     ExecutorService threadExecutor = Executors.newFixedThreadPool( 3 );

     // start threads and place in runnable state
     threadExecutor.execute( task1 ); // start task1
     threadExecutor.execute( task2 ); // start task2
     threadExecutor.execute( task3 ); // start task3

     threadExecutor.shutdown(); // shutdown worker threads

             System.out.println( "Threads started, main ends\n" );
  } // end main
} // end class RunnableTester