Re: passing parameters to methods to get a value back (by reference in C++) and one other question

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#19709

From: Joe Nuxoll
Date: Mon, 05 Jan 1998 00:00

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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

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From: Joe Nuxoll <jnuxoll@corp.borland.com>
Subject: Re: passing parameters to methods to get a value back (by reference in C++) and one other question
Date: 1998/01/05
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