/** A subclass of Thread that counts up to a specified
 *  limit with random pauses in between each count.
 *
 *  Taken from Core Web Programming from 
 *  Prentice Hall and Sun Microsystems Press,
 *  http://www.corewebprogramming.com/.
 *  © 2001 Marty Hall and Larry Brown;
 *  may be freely used or adapted. 
 */

public class Counter extends Thread {
  private static int totalNum = 0;
  private int currentNum, loopLimit;

  public Counter(int loopLimit) {
    this.loopLimit = loopLimit;
    currentNum = totalNum++;
  }

  private void pause(double seconds) {
    try { Thread.sleep(Math.round(1000.0*seconds)); }
    catch(InterruptedException ie) {}
  }

  /** When run finishes, the thread exits. */
  
  public void run() {
    for(int i=0; i<loopLimit; i++) {
      System.out.println("Counter " + currentNum + ": " + i);
      pause(Math.random()); // Sleep for up to 1 second
    }
  }
}