Design a class named Rectangle to represent a rectangle. The class contains the following.
1. Two double data fields named width and height that specify the width and height of the rectangle. The default values are 1 for both fields.
2. A no-arg constructor that creates a default rectangle.
3. A constructor that creates a rectangle with the specified width and height.
4. A method named getArea() that returns the area of the rectangle.
5. A named method getPerimeter() that returns the perimeter.
Draw the UML diagram for the class and include it in your report. Implement the class. Write a test or application 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
Solution
Rectangle.java
public class Rectangle {
private double width;
private double height;
private final double PI = 3.14;
public Rectangle(){
}
public Rectangle(double width, double height){
this.width = width;
this.height = height;
}
public double getArea(){
return width * height;
}
public double getWidth() {
return width;
}
public void setWidth(double width) {
this.width = width;
}
public double getHeight() {
return height;
}
public void setHeight(double height) {
this.height = height;
}
public double getPerimeter(){
return 2 * (height + width);
}
public String toString(){
return String.format(\"Rectangle: Area = %.2f , Perimeter = %.2f \",getArea(),getPerimeter());
}
}
RectangleTest.java
public class RectangleTest {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Rectangle r1 = new Rectangle();
r1.setWidth(4);
r1.setHeight(40);
Rectangle r2 = new Rectangle();
r2.setWidth(3.5);
r2.setHeight(35.9);
System.out.println(\"Rectangle Width \"+r1.getWidth()+\" Height :\"+r1.getHeight());
System.out.println(r1.toString());
System.out.println(\"Rectangle Width \"+r2Â Â .getWidth()+\" Height :\"+r2.getHeight());
System.out.println(r2.toString());
}
}
Output:
Rectangle Width 4.0 Height :40.0
Rectangle: Area = 160.00 , Perimeter = 88.00
Rectangle Width 3.5 Height :35.9
Rectangle: Area = 125.65 , Perimeter = 78.80
.
Design a class named Rectangle to represent a rectangle- The class con.docx
1. Design a class named Rectangle to represent a rectangle. The class contains the following.
1. Two double data fields named width and height that specify the width and height of the
rectangle. The default values are 1 for both fields.
2. A no-arg constructor that creates a default rectangle.
3. A constructor that creates a rectangle with the specified width and height.
4. A method named getArea() that returns the area of the rectangle.
5. A named method getPerimeter() that returns the perimeter.
Draw the UML diagram for the class and include it in your report. Implement the class. Write a
test or application 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
Solution
Rectangle.java
public class Rectangle {
private double width;
private double height;
private final double PI = 3.14;
public Rectangle(){
}
public Rectangle(double width, double height){
this.width = width;
this.height = height;
}
public double getArea(){
return width * height;
}
2. public double getWidth() {
return width;
}
public void setWidth(double width) {
this.width = width;
}
public double getHeight() {
return height;
}
public void setHeight(double height) {
this.height = height;
}
public double getPerimeter(){
return 2 * (height + width);
}
public String toString(){
return String.format("Rectangle: Area = %.2f , Perimeter = %.2f ",getArea(),getPerimeter());
}
}
RectangleTest.java
public class RectangleTest {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Rectangle r1 = new Rectangle();
r1.setWidth(4);
r1.setHeight(40);
Rectangle r2 = new Rectangle();
r2.setWidth(3.5);
r2.setHeight(35.9);
System.out.println("Rectangle Width "+r1.getWidth()+" Height :"+r1.getHeight());
System.out.println(r1.toString());
System.out.println("Rectangle Width "+r2Â Â .getWidth()+" Height :"+r2.getHeight());
System.out.println(r2.toString());
}
}
![public double getWidth() {
return width;
}
public void setWidth(double width) {
this.width = width;
}
public double getHeight() {
return height;
}
public void setHeight(double height) {
this.height = height;
}
public double getPerimeter(){
return 2 * (height + width);
}
public String toString(){
return String.format("Rectangle: Area = %.2f , Perimeter = %.2f ",getArea(),getPerimeter());
}
}
RectangleTest.java
public class RectangleTest {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Rectangle r1 = new Rectangle();
r1.setWidth(4);
r1.setHeight(40);
Rectangle r2 = new Rectangle();
r2.setWidth(3.5);
r2.setHeight(35.9);
System.out.println("Rectangle Width "+r1.getWidth()+" Height :"+r1.getHeight());
System.out.println(r1.toString());
System.out.println("Rectangle Width "+r2Â Â .getWidth()+" Height :"+r2.getHeight());
System.out.println(r2.toString());
}
}](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)