PROGRAM FOR PRINTTASK CLASS SLEEPS FOR A RANDOM TIME FROM 0 TO 5 SECONDS..

import java.util.Random;

class PrintTask implements Runnable
{
  private int sleepTime; // random sleep time for thread
  private String threadName; // name of thread
  private static Random generator = new Random();
 
  // assign name to thread
  public PrintTask( String name )
  {
     threadName = name; // set name of thread

     // pick random sleep time between 0 and 5 seconds
     sleepTime = generator.nextInt( 5000 );
  } // end PrintTask constructor
  // method run is the code to be executed by new thread
  public void run()                                  
  {
     try // put thread to sleep for sleepTime amount of time
     {
        System.out.printf( "%s going to sleep for %d milliseconds.\n",
           threadName, sleepTime );
         
        Thread.sleep( sleepTime ); // put thread to sleep
     } // end try
     // if thread interrupted while sleeping, print stack trace
     catch ( InterruptedException exception )
     {
        exception.printStackTrace();
     } // end catch

     // print thread name
     System.out.printf( "%s done sleeping\n", threadName );
  } // end method run
} // end class PrintTask