Question

Within NetBeans, write a Java program for EACH of the following problems.

(The Rectangle class) Following the example of the Circle class in Section 9.2, design a class named Rectangle to represent a rectangle. The class contains:

· Two double data fields named width and height that specify the width and height of the rectangle. The default values are 1 for both width and height.

· A no-arg constructor that creates a default rectangle.

· A constructor that creates a rectangle with the specified width and height. o width should be the first parameter in the constructor o height should be the second parameter

· A method named getArea() that returns the area of this rectangle.

· A method named getPerimeter() that returns the perimeter.

Implement the class, and then write a test program that creates two Rectangle objects— one with width 4 and height 40 and the other with width 3.5 and height 35.9. Display the width, height, area, and perimeter of each rectangle in this order

Answer 1

To run this code in your netbeans please create a new class named "Rectangle" and then copy the below code.

public class Rectangle{
double width,height;
Rectangle(){
//Default constructor with default sizes
width=1;
height=1;
}
Rectangle(double width, double height){
//Parameterised constructor
this.width=width;
this.height=height;
}
  
double getArea(){
return width*height;
}
  
double getPerimeter(){
return (2*(width+height));
}
  
public static void main(String []args){
//Testing by creating objects
Rectangle obj1=new Rectangle(4,40);
System.out.println("Width: "+obj1.width);
System.out.println("Height: "+obj1.height);
System.out.println("Area: "+obj1.getArea());
System.out.println("Perimeter: "+obj1.getPerimeter());
System.out.println("-------------------------------------");
Rectangle obj2=new Rectangle(3.5,35.9);
System.out.println("Width: "+obj2.width);
System.out.println("Height: "+obj2.height);
System.out.println("Area: "+obj2.getArea());
System.out.println("Perimeter: "+obj2.getPerimeter());

}
}

Code and output:

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