SwapMethod.java

//SwapInt
public static void swap(int a, int b) {
	
	int temp = a;
	a = b;
	b = temp;
}

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

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

//SwapPointRef
public static void swap(Point a, Point b) {
		
	int temp = a.getX();
	a.setX(b.getX());
	b.setX(temp);
 }