C Sc 335 Practice Quiz 2 Section Leader ___________ Name _________________________ 50pts
Given class Point and a test driver for class Circle and class Rectangle, establish a properly designed inheritance hierarchy. Let Shape be the abstract class. Implement all three classes to the right of the non-
inheritance version below. Completely implement all constructors and all methods. Include all instance variables. The Circle and Rectangle classes must behave exactly the same with the inheritance hierarchy as
without. The assertions must pass. (22pts)
@Test
public void test getArea() {
// 10 pixels over, 10 pixels down, radius 2.0
Shape c = new Circle(10, 10, 2.0);
asssertEquals(3.14159, c.getArea(), 0.001);
// width = 3.25, height = 5.75
Shape r = new Rectangle(40, 10, 3.25, 5.75);
sssertEquals(18.6875, r.getArea(), 0.001);
// width = 3.25, height = 5.75
Shape r2 = new Rectangle(40, 60, 2, 3);
sssertEquals(6.0, r.getArea(), 0.1);
}
public class Point { // Use this Point class
private int xPos;
private int yPos;
public Point(int x, int y) {
xPos = x;
yPos = y;
}
public int getX() {
return xPos;
}
public int getY() {
return yPos;
}
}
public class Rectangle {
private Point upperLeft;
private double width;
private double height;
public Rectangle(int x, int y,
double height, double width) {
upperLeft = new Point(x, y);
width = width;
height = height;
}
public int getX() {
return upperLeft.getX();
}
public int getY() {
return upperLeft.getY();
}
public double getArea() {
return width * height;
}
}
public class Circle {
private Point upperLeft;
private double radius;
public Circle(int x, int y,
double diameter) {
upperLeft = new Point(x,y);
radius = diameter / 2;
}
public int getX() {
return upperLeft.getX();
}
public int getY() {
return upperLeft.getY();
}
public double getArea() {
return Math.PI*Math.pow(radius, 2);
}
}
Completely implement the hierarchy here: Shape, Circle, and Rectangle
