🚀 go-pugleaf

Except of course that you would never make "value" public.  You would instead
use a setValue() method so that you could later make it synchronized or apply
some other change without breaking programs that use AnInteger.

public class AnInteger {
  private int value;
  public AnInteger() {}
  public AnInteger(int value) { this.value = value; }
  public int getValue() { return value; }
  public void setValue(int new_value) { value = new_value; }
}

++Brian

Joe Nuxoll wrote:
> 
> Eric Nagler wrote:
> > You can't do that. Integer objects are immutable. The best Java can do
> > is create a new instance using the modifed value. For example:
> 
> True, but you can do it if you use a regular mutable class like Point or
> Rectangle or your own class like AnInteger:
> 
> public class AnInteger {
>   public int value;
>   public AnInteger() {}
>   public AnInteger(int value) { this.value = value; }
> }
> 
> ...
> 
> void increment(AnInteger data) {
>   data.value += 1;
> }
> 
> ...
> 
> void main() {
>   AnInteger i = new AnInteger(5);
>   increment(i);
> }
> 
>  - Joe Nuxoll

-- 
Brian Burton                        Custom Software Development
Burton Computer Corporation         Java, C++, Orbix, Tuxedo
http://www.burton-computer.com      OO Consulting and Mentoring