suspect the current thread execution without consume cpu

/*
 * Copyright@ 2011 www.egtry.com
 */

package egtry.thread;

import java.util.Date;

//suspect the execution of the current thread for certain period of time (millisecond)
public class Sleep {

  public static void main(String[] args) {

    System.out.println("Start the program at: "+new Date());
    
    try {
    	Thread.sleep(3*1000); //sleep for 3 seconds
    } catch (Exception e) {
    	System.out.println("the sleeping was interrupted");
    }
    System.out.println("Done at: "+new Date());

  }
}

Start the program at: Mon Oct 03 11:37:48 CDT 2011
Done at: Mon Oct 03 11:37:51 CDT 2011