Implement a subclass Square that extends the Rectangle class. In the constructor

Question

Implement a subclass Square that extends the Rectangle class. In the constructor, accept the x- and y-positions of the center and the side length of the square. Call the setLocation and setSize methods of the Rectangle class. Look up these methods in the documentation for the Rectangle class. Also supply a method getArea that computes and returns the area of the square. Write a sample program that asks for the center and side length, then prints out the square (using the toString method that you inherit from Rectangle) and the area of the square.

Explanation / Answer

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//Rectangle Class---Super Class

package com.cramster.rakesh;

public class Rectangle {

public int x,y,width,height;



public void setLocation(int x, int y) {
this.x = x;
this.y = y;
}

public void setSize(int width, int height) {

this.width = width;
this.height = height;
}

public String toString() {
int x = (int) getX();
int y = (int) getY();
int w = (int) getWidth();
int h = (int) getHeight();
return "Square[x=" + x + ",y=" + y + ",width=" + w + ",height=" + h + "]";
}


public int getX() {
return x;
}

public void setX(int x) {
this.x = x;
}

public int getY() {
return y;
}

public void setY(int y) {
this.y = y;
}

public int getWidth() {
return width;
}

public void setWidth(int width) {
this.width = width;
}

public int getHeight() {
return height;
}

public void setHeight(int height) {
this.height = height;
}
}




//Square Class(Subclass) extends Rectangle

package com.cramster.rakesh;

public class Square extends Rectangle{

//Constructor with three parameters

public Square(int x, int y, int length) {
setLocation(x - length / 2, y - length / 2);
setSize(length, length);
}

public int getArea() {
return (int) (getWidth() * getHeight());
}

public String toString() {
int x = (int) getX();
int y = (int) getY();
int w = (int) getWidth();
int h = (int) getHeight();
return "Square{x=" + x + ",y=" + y + ",width=" + w + ",height=" + h + "}";
}

public static void main(String[] args)
{
Square sq = new Square(28, 20, 28);
System.out.println(sq.toString());
//System.out.println("Expected: Square[x=-5,y=5,width=30,height=30]");
System.out.println("Area: " + sq.getArea());
//System.out.println("Expected: 900");
}

}



OutPut:----

Square{x=14,y=14,width=28,height=28}
Area: 784

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