// Client program to explore references

public class References {
    public static void main(String[] args) {
        int a = 4;
        int b = a;
        a = 7;

        System.out.println("a = " + a);
        System.out.println("b = " + b);

        Point p = new Point(1, 2);
        Point q = p;
        p = new Point(3, 4);

        System.out.println("p = " + p);
        System.out.println("q = " + q);
    }

    // How many point objects exist in this method? [2]
    // What is the output of this method? [(3, 2)]
    public static void pollEverywhere() {
        Point p = new Point(1, 2);
        Point q = p;
        Point r = q;
        q = new Point(4, 5);
        r.setX(3);
        System.out.println(p);
    }
}