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From: Martin Gregorie <martin@address-in-sig.invalid>
Newsgroups: comp.lang.java.programmer
Subject: Re: How to assign an object to another in it method?
Date: Mon, 3 Jul 2017 17:28:22 -0000 (UTC)
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On Mon, 03 Jul 2017 11:34:39 -0400, Eric Sosman wrote:

> On 7/3/2017 8:37 AM, Martin Gregorie wrote:
>> On Mon, 03 Jul 2017 10:59:12 +0000, Martin Gregorie wrote:
>> 
>> Hadn't checked/compiled the previous example, which of course should
>> be:
>> 
>> public class Demo {
>>     private String  name;
>>     private int     number;
>>     private boolean prisoner;
>> 
>>     public Demo(String name, int answer, boolean prisoner)
>>     {
>>        this.name = name; this.number = number;
> 
>      For some reason, NetBeans warns about this line ...  :(
> 
>      (Don't feel too bad, Martin: Some Days Are Just Like That,
> and I've had plenty of them.)

Interesting: it compiled with no errors, using javac 1.8.0_91, so I 
extended it a bit to this so it actually did something:

public class Demo
{
 private String  name;
 private int     number;
 private boolean prisoner;

 public Demo(String name, int number, boolean prisoner)
 {
  this.name = name;
  this.number = number;
  this.prisoner = prisoner;
 }

 public Demo(String name)
 {
  this(name, 6, true);
 }

 public void dialogue()
 {
  System.out.println("You are now " +
                     (prisoner ? "a prisoner" : "free to leave"));
  System.out.println("I, " + name + ", am a free man!");
  System.out.println("You are number " + number);
 }

 public static void main(String[] args)
 {
  Demo d = new Demo("Patrick McGoohan");
  d.dialogue();
 }
}

... and promptly found the mistake in the first constructor (2nd argument 
had 'answer' as it sname, causing this.number to be assigned to itself). 

I assume that this is what NetBeans objected to? 

Anyway, this is fixed in the version shown above and runs as expected.

BTW, I don't use IDEs at all, preferring to work with a bog-standard text 
editor and a couple of command-line consoles.


-- 
martin@   | Martin Gregorie
gregorie. | Essex, UK
org       |