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Index › Programming Questions & Help › Programs › can't access variable outside of class
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can't access variable outside of class (Read 432 times)
.ben
can't access variable outside of class
Jun 18th, 2008, 12:10am  
Hi All,

The code I experience some troubles with is at: http://benmeijering.nl/applet/

If you uncomment "println(number.length);" in Player.hit() I get the error message: The type of this expression, "int", is not a reference type.

The code itself is yet meaningless; eventually I want to do some hit tests... The problem, though, I can't understand, because I can't seem to replicate this problem with variables, and can't even replicate this problem in simpler programs with the same classes.

Hope someone sees the problem.

Thnx, ben
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JohnG
Re: can't access variable outside of class
Reply #1 - Jun 18th, 2008, 12:35am  
You have 2 variables called number, there's a global array of Numbers called number, and within the Player class there's a int called number.

So when you access number.length within Player, it tries to get a value called "length" from the int, which is impossible.
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.ben
Re: can't access variable outside of class
Reply #2 - Jun 18th, 2008, 12:58am  
John, thanks.
Indeed, that's the problem. So'll come up with another variable name.
I don't want to be lazy but is there a way to access the array 'number' outside the class Player and not change the the variable name 'number' within player; at some point I'll run out of synonyms....
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antiplastik
Re: can't access variable outside of class
Reply #3 - Jun 18th, 2008, 10:07am  
no. and that would be a terrible idea.

you can use numbers and number, if you need some inspiration ;-)
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WWW  
.ben
Re: can't access variable outside of class
Reply #4 - Jun 18th, 2008, 10:42am  
I had that coming, I guess.
But I thought there could be some syntax to refer to variables outside classes, as well as, variables inside classes (this).
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JohnG
Re: can't access variable outside of class
Reply #5 - Jun 18th, 2008, 10:53am  
this. only helps distinguish between passed in arguments, and member variables.

e.g.
Code:
int number;

class foo
{
  float number;
  void thing(String number)
  {
    //number == String
    //this.number == float
    //no way to get at the int number.
  }
}
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