다음의 코드 내용에서 출력을 예상해 보세요. class Point{ public int x, y; public Point(int x, int y) { this.x = x; this.y = y; } public void changePoint(int x, int y) { this.x = y; this.y = x; } } class Rectangle implements Cloneable{ private Point upperLeft, lowerRight; public Rectangle(int x1, int y1, int x2, int y2) { upperLeft = new Point(x1, y1); lowerRight = new Point(x2, y2); } public void showRectangle() {..
