return an array refrence variable from a method?
<p>Consider the follwing code:</p>

<pre><code>class Box {
    int size;

    Box(int s) { 
        size = s; 
    }
}

public class Laser {
    public static void main(String[] args) {
        Box b1 = new Box(5);
        Box[] ba = go(b1, new Box(6));
        ba[0] = b1;
        for (Box b : ba) {
            System.out.print(b.size + " ");
        }
    }

    static Box[] go(Box b1, Box b2) {
        b1.size = 4;
        Box[] ma = {b2, b1};
        return ma;
    }
}
</code></pre>

<p>What is the result? 
i solved it to be 5 4 but it's not the right one, the right answer is 4 4, how that come?</p>
