Counter on a Timer

[Radiata]

Hi im trying to get this super simple counter to work on a 1 second delay. But for some reason i can't for the life of me get it to update the counter.

import java.util.Timer;
import java.util.TimerTask;

/**
 * Schedule a task that executes once every second.
 */

public class Clock {
  Timer timer;

  public Clock() {
    timer = new Timer();
    timer.schedule(new RemindTask(), 0, //initial delay
        1 * 1000); //subsequent rate
  }

  class RemindTask extends TimerTask {
    int num = 3600; //one hour

    public void run() {
      if (num > 0) {     
        int count = 0;
        System.out.println("The number of seconds passed = " + (count = count + 1));
        num--;
      } 
      else {
        System.out.println("Time's up!");
        System.exit(0); //Stops the AWT thread (and everything else)
      }
    }
  }

  public static void main(String args[]) {
    System.out.println("About to schedule task.");
    new Clock();
    System.out.println("Task scheduled.");
  }
}

[keang]

That's because your main method is exiting before the timer has had chance to run. You need to prevent the main thread from immediately terminating - you can do this by calling Thread.sleep(..) or the clock objects wait() method.

[laitinen]

Problem here is that your counter is reset to 0 every time your run method runs.

Just move it out of the run method:

class RemindTask extends TimerTask {
    int num = 3600; //one hour

    int count = 0;
    
    public void run() {
      if (num > 0) {     
       
        System.out.println("The number of seconds passed = " + (count = count + 1));
        num--;
      } 
      else {
        System.out.println("Time's up!");
        System.exit(0); //Stops the AWT thread (and everything else)
      }
    }
  }