Global variables in Java

Question

How do you define Global variables in Java ?

Answer 1

As you probably guess from the answer there is no global variables in Java and the only thing you can do is to create a class with static members:

public class Global {
    public static int a;
}

You can use it with Global.a elsewhere. However if you use Java 1.5 or better you can use the import static magic to make it look even more as a real global variable:

import static test.Global.*;

public class UseGlobal {
    public void foo() {
        int i = a;
    }
}

And voilà!

Now this is far from a best practice so as you can see in the commercials: don't do this at home