Question

Create a class called Retangle.java that contains two double-precision instance variables named width and height. The class should include all kinds of overloaded constructors. Additionally, there should be two accessor methods, mutator methods, class method named area() that returns the area of a Rectangle object. Inside main(),fully test all methods.

Answer 1

CODE

public class Rectangle {

private double length, width;

public Rectangle() {

this.length = 1;

this.width = 1;

}

public Rectangle(double length, double width) {

setLength(length);

setWidth(width);

}

/**

* @return the length

*/

public double getLength() {

return length;

}

/**

* @param length the length to set

*/

public void setLength(double length) {

if (length < 0) {

System.out.println("Invalid length!!");

return;

}

this.length = length;

}

/**

* @return the width

*/

public double getWidth() {

return width;

}

/**

* @param width the width to set

*/

public void setWidth(double width) {

if (width < 0) {

System.out.println("Invalid width!!");

}

this.width = width;

}

public double getPerimeter() {

return 2*(length + width);

}

public double getArea() {

return length * width;

}

public static void main(String[] args) {

Rectangle r1 = new Rectangle(40, 4);

Rectangle r2 = new Rectangle(3.5, 35.9);

System.out.println("Width of rectangle 1: " + r1.getWidth());

System.out.println("Height of rectangle 1: " + r1.getLength());

System.out.println("Perimeter of rectangle 1: " + r1.getPerimeter());

System.out.println("Area of rectangle 1: " + r1.getArea());

System.out.println("Width of rectangle 2: " + r2.getWidth());

System.out.println("Height of rectangle 2: " + r2.getLength());

System.out.println("Perimeter of rectangle 2: " + r2.getPerimeter());

System.out.println("Area of rectangle 2: " + r2.getArea());

}

}