Design a class named Rectangle to represent a rectangle. The class contains two

Question

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 neight of the rectangle
A no-arg constructor that creates a rectangle with the specified width and height
A method named getArea() that returns the area of this rectangel
A method named getPerimeter() that returns the perimeter

Draw the UML diagram for the class. Implement the class. Write a test program that creates two rectangel 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.

Explanation / Answer

public class Rectangle {
    private double height;
    private double width;
    
    Rectangle(){
      this.height=1;
      this.width=1;
    }
    Rectangle(double width, double height) {
        this.width=width;
        this.height=height;
    }
    
    double getArea() {
        return this.width*this.height;
    }
    double getPerimeter() {        
        return  2 *(this.width+this.height);
    }
        
    public String toString() {
        // Prints output to two decimals.
        java.text.DecimalFormat decimalFormat = new java.text.DecimalFormat("#.##");
        String output= "Width : "+this.width+" "+
                       "Height : "+this.height+" "+
                       "Area : "+decimalFormat.format(getArea())+" "+
                       "Perimeter : "+decimalFormat.format(getPerimeter());
        return output;
    }
    public static void main(String[] args) {
        Rectangle objRectangle1 = new Rectangle(4,40);
        Rectangle objRectangle2 = new Rectangle(3.5,35.9);
        
        System.out.println(objRectangle1.toString());
        System.out.println(objRectangle2.toString());
        
        
    }            
}
public class Rectangle {
    private double height;
    private double width;
    
    Rectangle(){
      this.height=1;
      this.width=1;
    }
    Rectangle(double width, double height) {
        this.width=width;
        this.height=height;
    }
    
    double getArea() {
        return this.width*this.height;
    }
    double getPerimeter() {        
        return  2 *(this.width+this.height);
    }
        
    public String toString() {
        // Prints output to two decimals.
        java.text.DecimalFormat decimalFormat = new java.text.DecimalFormat("#.##");
        String output= "Width : "+this.width+" "+
                       "Height : "+this.height+" "+
                       "Area : "+decimalFormat.format(getArea())+" "+
                       "Perimeter : "+decimalFormat.format(getPerimeter());
        return output;
    }
    public static void main(String[] args) {
        Rectangle objRectangle1 = new Rectangle(4,40);
        Rectangle objRectangle2 = new Rectangle(3.5,35.9);
        
        System.out.println(objRectangle1.toString());
        System.out.println(objRectangle2.toString());
        
        
    }            
}

Related Questions

Navigate

• Browse (All)
• Browse D
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.