SwapPoint.java

/**
 * Created by ChiNV on 3/2/2017.
 */
public class SwapPoint {

    public static void swap(Point a, Point b) {

        Point temp = a;
        a = b;
        b = temp;
    }

    public static void main(String[] argv) {

        Point c = new Point(1);
        Point d = new Point(2);

        System.out.println("c: " + c);
        System.out.println("d: " + d);

        swap(c, d);

        System.out.println("c: " + c);
        System.out.println("d: " + d);
    }
}