JAVA array help.

Thsharp01 · 28 Nov 2008 at 11:47

If anybody could point me in the right direction as to why I cannot do this.

Code:

int valueOfCoin = validCoins[index].getValue( );

validCoins is a valid array and index is a valid variable containing a number that chooses which line of the array to get the value of.

getValue() is a method within a different class that just returns an integer.

I might not have given enough information to answer this question but anybody have any ideas?

Thsharp01 · 28 Nov 2008 at 11:51

Ah, it was my fault, it does work was looking at an older class file! Keeping track of which version of my class I need is a pain when working across multiple systems!

fez · 28 Nov 2008 at 11:54

show us the code of the getValue method. And what is the error

dangerstat · 28 Nov 2008 at 11:55

Thsharp01 said:
If anybody could point me in the right direction as to why I cannot do this.

Code:

int valueOfCoin = validCoins[index].getValue( );

validCoins is a valid array and index is a valid variable containing a number that chooses which line of the array to get the value of.

getValue() is a method within a different class that just returns an integer.

I might not have given enough information to answer this question but anybody have any ideas?

What error / warning do you get, how big is your code can you not post it here and highlight the relevant bits please.

SoapSurgeon · 28 Nov 2008 at 14:42

What are the odds it is an IndexOutOfBoundsException or NullPointerException?

Thsharp01 · 28 Nov 2008 at 15:55

SoapSurgeon said:
What are the odds it is an IndexOutOfBoundsException or NullPointerException?

It was because I never wrapped my if statement in the good old curly braces! Bad habits :eek:

Whereas I assumed it was to do with the syntax of the statement I added (as quoted in the first post).

RobH · 29 Nov 2008 at 17:43

Thsharp01 said:
Ah, it was my fault, it does work was looking at an older class file! Keeping track of which version of my class I need is a pain when working across multiple systems!

Get yourself a USB flash drive and save the files to it. That way you can load up the same project in multiple locations. Just be sure to use something like synchtoy to create backups of the drive daily.