Question

My assignment is to create a rectangle class in java.

•Create a MyRectangleClass

•There are two private instance variables, length l and width w with double data type.

•There is a constructor with two parameter

•There are 4 public methods which are circumference, area, getWidth, and getLength.

•circumference method will return circumference to the caller.(the formula for circumference is 2 *l + 2*w ) •Area method Return the area to the caller(:l*w)

•getLength method will return length to the caller.

•getWidth method will return the width.

•Declare another class with a main method to declare an object of a myRectangle and test all methods and print out result.

this is my class with all methods

public class MyRectangle {
private double length;
private double width;
  
  
public void Rectangle (){}
  
public void Rectangle(double l, double w){
length = l;
width = w;
}
  
public double getLength(){
return length;
}
  
public double getWidth(){
return width;
}

public double getCircumference(){
return 2*l+w*2;
}
  
public double getArea(){
return l*w;
}
  
}

This is my class to test them.

import java.util.*;

public class RectangleManager{

public static void main(String[] args){

Rectangle r1 = new Rectangle(8,5);


System.out.println("This is the area of the Rectangle: " + r1.getArea);
System.out.println("This is the circumference of the Rectangle: " + r1.getcircumference);


}

}

For the first class, I keep getting an error with the area and circumference with using l and w. For the testing class, I get an error about the Rectangle.

Answer 1

MyRectangle.java

public class MyRectangle {
  
private double length, width;
  
public MyRectangle()
{
this.length = this.width = 0;
}

public MyRectangle(double length, double width) {
this.length = length;
this.width = width;
}

public double getLength() {
return length;
}

public double getWidth() {
return width;
}
  
public double getCircumference()
{
return(2 * (this.length + this.width));
}
  
public double getArea()
{
return (this.length * this.width);
}
}

RectangleManager.java (Main class)

public class RectangleManager {
  
public static void main(String[] args)
{
MyRectangle r1 = new MyRectangle(8,5); // You were mistaken here: The class name is MyRectangle
  
System.out.println("This is the area of the Rectangle: " + r1.getArea()); // Also here, you were mistaken with the function names (need to be same as it is defined) and also, you forgot to use brackets after the function name
System.out.println("This is the circumference of the Rectangle: " + r1.getCircumference());
}
}

*************************************************************** SCREENSHOT ************************************************************