Getting access to variable inside function

Question

I am positive this has probably been answered many many times but I do not know the words to search for to find the answer. So here is the question

I'm using java and I have

int my_var = 3;

thing.myListener(new Listener() {
    public void onStart(int posistion) {
            my_var <-- I want to get access to my_var
        }
    });

How do I get access to my_var inside the onStart function. Also what is this type of problem called? Thanks!

Besides, I and Oracle recommend you to rename your variable to myVar instead of the PHP styled, my_var. — adarshr
– adarshr, Commented Jan 20, 2012 at 9:37

T.J. Crowder · Accepted Answer · 2012-01-20 09:49:53Z

3

You have to make it final. This is an anonymous inner class.

final int my_var = 3;

edited Jan 20, 2012 at 9:49

T.J. Crowder

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answered Jan 20, 2012 at 9:34

adarshr

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2 Comments

adarshr Over a year ago

Can you show your exact code? The approach should work for any type of object.

Gal Over a year ago

If you are working with eclipse, it suggests you do just that automatically.

Frankline · Accepted Answer · 2012-01-20 09:34:54Z

-2

I would suggest using global variables. Here is an example:

A simple way to utilize "global" variables in Java is to define a class Global with the desired variables as static members of it:

    public class Global {
            public static int x = 37;
            public static String s = "aaa";
    }

Such members can be accessed by saying:

    public class test {
            public static void main(String args[])
            {
                    Global.x = Global.x + 100;
                    Global.s = "bbb";
            }
    }

Is that what you are looking for?

answered Jan 20, 2012 at 9:34

Frankline

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2 Comments

adarshr Over a year ago

It's a terrible idea to have global variables. Only constants can be global. If you make variables global, you'll lose thread safety.

adarshr Over a year ago

@AlexisK won't be too long before it breaks though :)

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