The following program yields "5, 6".
class Lang {
    int i = m();
    int j = 0;
    Lang() {
System.out.println(i + ", " + j);
    }
    int m() { j = 5; return j++; }
    static public void main(String args[]) {
new Lang();
    }
}

However, the following program yields "5, 1".
class Lang {
    int i = m();
    int j = 1;
    Lang() {
System.out.println(i + ", " + j);
    }
    int m() { j = 5; return j++; }
    static public void main(String args[]) {
new Lang();
    }
}