נתונות המחלקות AA, BB:

java
1public class AA {
2    private int x;
3    public AA() { this.x = 4; }
4    public AA(int x) { this.x = x; }
5    public int getX() { return this.x; }
6    public void foo() { this.x = 3; }
7    public void goo() { this.x = this.x + 3; }
8    public void bar() { goo(); }
9    public String toString() { return "x = " + this.x; }
10}

java
1public class BB extends AA {
2    private int y;
3    public BB() {
4        super();
5        this.y = 2;
6    }
7    public BB (int a) {
8        super (a);
9        this.y = getX() * 2;
10    }
11    public BB (int a, int b) {
12        super (a);
13        this.y = b;
14    }
15    public int getY() { return this.y; }
16    public void foo() { this.y = 5; }
17    public void goo() { this.y = getX() – 1; }
18    public void bar (int a) {
19        this.y = a + getX() + this.y;
20    }
21    public String toString() {
22        return super.toString() + "  y = " + this.y;
23    }
24}