How to initialize variable within block?

Question

Issue with used variable in inner loop.

Timer innerTimer = new Timer() {         
      @Override
      public void run() {
        for(final Rectangle rectangle : rectangles) {
          if(stopTimer) {
            this.cancel();
            innerTimer = null; // It shows "Cannot refer to a non-final variable innerTimer inside an inner class defined in a different method"
            break;
          }
        }
      }
    };

If I changed The above code as :

    final Timer innerTimer = new Timer() {         
      @Override
      public void run() {
        for(final Rectangle rectangle : rectangles) {
          if(stopTimer) {
            this.cancel();
            innerTimer = null; // "The final local variable innerTimer cannot be assigned, since it is defined in an enclosing type"
            break;
          }
        }
      }
    };

I am using this timer from GWT (com.google.gwt.user.client.Timer).

How to intialized variable in inner loop?

Answer 1

You could wrap the Timer object. E.g.

public class TimerWrap {

    Timer timer = new Timer();

    public void cancel() {
        timer.cancel();
        timer = null;
    }
}

and use it like this

final TimerWrap innerTimer = new TimerWrap() {
    public void run() {
        for (final Rectangle rectangle : rectangles) {
            if (stopTimer) {
                this.cancel();
                break;
            }
        }
    }
};