Modify CodeGiven below is a Rectangle class consisting of an upper left coordinate and a lower right coordinate.class Rectangle { int upperLeftX; int upperLeftY; int lowerRightX; int lowerRightY;}Since the upper left coordinate and lower right coordinate comprise of points, how would you modify the definition of the Rectangle class to include these points in your class?Hint: You can create a Point class to store the x and y coordinates of the upper left and lower right points and use composition to include the upper left and lower right points inside the Rectangle class, as objects of the Point class.
Question
Modify CodeGiven below is a Rectangle class consisting of an upper left coordinate and a lower right coordinate.class Rectangle { int upperLeftX; int upperLeftY; int lowerRightX; int lowerRightY;}Since the upper left coordinate and lower right coordinate comprise of points, how would you modify the definition of the Rectangle class to include these points in your class?Hint: You can create a Point class to store the x and y coordinates of the upper left and lower right points and use composition to include the upper left and lower right points inside the Rectangle class, as objects of the Point class.
Solution
First, you would need to create a Point class to store the x and y coordinates. Here is a simple implementation in Java:
public class Point {
int x;
int y;
// Constructor
public Point(int x, int y) {
this.x = x;
this.y = y;
}
}
Then, you can modify the Rectangle class to include the upper left and lower right points as objects of the Point class:
public class Rectangle {
Point upperLeft;
Point lowerRight;
// Constructor
public Rectangle(Point upperLeft, Point lowerRight) {
this.upperLeft = upperLeft;
this.lowerRight = lowerRight;
}
}
In this way, you are using composition to include the upper left and lower right points inside the Rectangle class. You can now create a rectangle by creating two points and passing them to the Rectangle constructor:
Point upperLeft = new Point(1, 2);
Point lowerRight = new Point(3, 4);
Rectangle rectangle = new Rectangle(upperLeft, lowerRight);
This is a more flexible design because it allows you to manipulate points and rectangles independently. For example, you can change the coordinates of a point without affecting the rectangle that uses it.
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