Answer to Question #299289 in Java | JSP | JSF for Angge

Question

Construct a class called Rectangle. A Rectangle has both a length and a width (both positive integers). Access to them should be only inside the class and within the inheritance hierarchy. Then implement the following:

• lone constructor that accepts two integers for the length and the width. Prints "Rectangle Constructor"
• getters and setters
• area - prints "Rectangle Area" and returns the area of the rectangle
• perimeter - prints "Rectangle Perimeter" and returns the perimeter of the rectangle

Square construction prints "Square Constructor" and accepts one integer which is the length of a side. The version of the area and perimeter of Square prints "Square Area" and "Square Perimeter", respectively.

Input

A positive integer representing the length of the side of a Square.

2

Output

The message of the constructors when called, the area, and perimeter of Square.

Rectangle·Constructor
Square·Constructor
Square·Area
Area:·4
Square·Perimeter
Perimeter:·8

Answer 1

import java.util.Scanner;


class Rectangle {
	private int length;
	private int width;


	/***
	 * constructor that accepts two integers for the length and the width. Prints
	 * "Rectangle Constructor"
	 * 
	 * @param length
	 * @param width
	 */
	public Rectangle(int length, int width) {
		System.out.println("Rectangle Constructor");
		this.length = length;
		this.width = width;
	}


	/***
	 * area - prints "Rectangle Area" and returns the area of the rectangle
	 * 
	 * @return
	 */
	public int area() {
		System.out.println("Rectangle Area");
		return this.length * this.width;
	}


	/**
	 * perimeter - prints "Rectangle Perimeter" and returns the perimeter of the
	 * rectangle
	 * 
	 * @return
	 */
	public int perimeter() {
		System.out.println("Rectangle Perimeter");
		return 2 * (this.length + this.width);
	}


	/**
	 * @return the length
	 */
	public int getLength() {
		return length;
	}


	/**
	 * @param length the length to set
	 */
	public void setLength(int length) {
		this.length = length;
	}


	/**
	 * @return the width
	 */
	public int getWidth() {
		return width;
	}


	/**
	 * @param width the width to set
	 */
	public void setWidth(int width) {
		this.width = width;
	}


}


class Square extends Rectangle {


	public Square(int length) {
		super(length, length);
		System.out.println("Square Constructor");
	}


	/***
	 * area - prints "Square Area" and returns the area of the Square
	 * 
	 * @return
	 */
	public int area() {
		System.out.println("Square Area");
		return this.getLength() * this.getLength();
	}


	/**
	 * perimeter - prints "Square Perimeter" and returns the perimeter of the Square
	 * 
	 * @return
	 */
	public int perimeter() {
		System.out.println("Square Perimeter");
		return 2 * (this.getLength() + this.getLength());
	}
}


class App {


	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		// Inpu A positive integer representing the length of the side of a Square.
		int length = scanner.nextInt();
		Square square = new Square(length);
		System.out.println("Area: " + square.area());
		System.out.println("Perimeter: " + square.perimeter());
		scanner.close();
	}


}