/*
    Method5.java
    CIS 160
    10/18/04

    passing reference variables
*/

class MyNum {
    public int n;
}

public class Method5 {
    public static void main(String[] args) {
        MyNum obj = new MyNum();
        obj.n = 5;
        System.out.println("Before calling changeNum(): " + obj.n);
        changeNum(obj);
        System.out.println("After calling changeNum():  " + obj.n);
    }

    private static void changeNum(MyNum o) {
        System.out.println("Start of changeNum(): " + o.n);
        o.n = 7;
        System.out.println("End of changeNum():   " + o.n);
    }
}

/*
    Output:

    Before calling changeNum(): 5
    Start of changeNum(): 5
    End of changeNum():   7
    After calling changeNum():  7
*/