Page History

public class Widget {
  public int total;
  void add() {
    if (total < Integer.MAX_VALUE) {      
      total++;
      // ...
    } else {
      throw new ArithmeticException("Overflow");
    }
  }

  void remove() {  
    if (total > Integer.MIN_VALUE) {      
      total--;
      // ...
    } else {
      throw new ArithmeticException("Overflow");
    }
  }

  public int getTotal () {
    return total;
  }
}