How to share data between separate classes in Java

Question

What is the best way to share data between separate classes in Java? I have a bunch of variables that are used by different classes in separate files in different ways. Let

Answer 1

This question is a bit mad - the code in the question won't compile.

public class Main {
    public static void main(String... args) {
        MutableDataContainer m = new MutableDataContainer();
        ImmutableDataContainer i = computeImmutableData();
        new ADoer().doA(m, i);
        new BDoer().doB(m, i);
    }
    ...
}

class MutableDataContainer {
    private int x, y;
    ... // getters and setters below
}

class ImmutableDataContainer {
    private final int p, q, r, s;
    ... // getters below
}

You'll need to define ADoer and BDoer as well.