Fun with java threads, exceptions, and exception handlers

SimpleThread.java

public class SimpleThread extends Thread {
  private int countDown = 5;
  private boolean triggerExceptions = false;

  public SimpleThread( boolean enableHandler, boolean triggerExceptions) {
    super("Error Test"); // Store the thread name

    this.triggerExceptions = triggerExceptions;
    if (enableHandler) setHandler();
    start();
  }

  public String toString() {
    return "  #" + getName() + ": " + countDown + " (Stopping at 0)";
  }
  
  public void run() {
    while(true) {
      try {
        System.out.println(this);
        
        if (countDown == 3 && triggerExceptions) exception();
        if (countDown == 2 && triggerExceptions) internalError();
      }
      catch (Exception e ) {
        System.err.println("    ERROR CAUGHT: " + e.getMessage());
      }
      finally {
        if(--countDown == 0) return; // MAX of 5 loops

        try {
          Thread.sleep( 1000 );
        } 
        catch (InterruptedException Ex) {
          /* do nothing */
        }
      }
    }
  }

  private void setHandler() {
    this.setUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
        public void uncaughtException(Thread t, Throwable e) {
           System.err.println(t + " I resurrected from death: " + e);
        }
    });
  }

  private void internalError() {
    throw new InternalError("This is very bad and it will kill you, Die Motherfucker!");
  }
  
  private void exception() {
    throw new RuntimeException("This is bad, but it will not kill you :-)");
  }
  
  public static void main(String[] args) {
    //System.out.println("Running with no errors:");
    //new SimpleThread(false, false);
    
    //System.out.println("Running errors and a try catch:");
    //new SimpleThread(false, true);
    
    System.out.println("Running with errors and an excption handler:");
    new SimpleThread(true, true);
  }
}