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class Dimensions {
  private int length;
  private int width;
  private int height;

  public Dimensions(int length, int width, int height) {
    this.length = length;
    this.width = width;
    this.height = height;
  }

  protected int getVolumePackage(int weight) {
    length += 2;
    width  += 2;
    height += 2;
    try {
      if(length &lt;<= 2 || width &lt;<= 2 || height &lt;<= 2 || weight &lt;<= 0 || weight &gt;> 20)
        throw new IllegalArgumentException();
	
        int volume = length * width * height; // 12 * 12 * 12 = 1728
        length -=2; width -= 2; height -= 2; // Revert back
        return volume;
      } catch(Throwable t) { 
        MyExceptionReporter mer = new MyExceptionReporter();
        mer.report(t); // Sanitize 
        return -1; // Non-positive error code
      }	
  }

  public static void main(String[] args) {
    Dimensions d = new Dimensions(10, 10, 10);
    System.out.println(d.getVolumePackage(21)); // Prints -1 (error)
    System.out.println(d.getVolumePackage(19)); // Prints 2744 instead of 1728
  }
}

protected int getVolumePackage(int weight) {
  try {
    if(length &lt;<= 0 || width &lt;<= 0 || height &lt;<= 0 || weight &lt;<= 0 || weight &gt;> 20)
      throw new IllegalArgumentException(); // Validate first
    
    length += 2;
    width  += 2;
    height += 2;

    int volume = length * width * height;
    length -=2; width -= 2; height -= 2;
    return volume;
  } catch(Throwable t) { MyExceptionReporter mer = new MyExceptionReporter();
    mer.report(t); // Sanitize 
    return -1;
  }		
}