Question

Create a class Rectangle with attributes length and width, each of which defaults to 1. Provide methods that calculate the rectangle's perimeter and area. It hasset and get methods for both lengthand width. Theset methodsshould verify that lengthand width are each floating-point numbers larger than 0.0 and less than 20.0. Write a program totest class Rectangle.

Program should be written in Java .

I need some with this problem so urgently----test is due tomorrow and will be similar tothe above question. I cannot afford to fail the test.

Answer 1

public class Rectangle

{

float length,width; //attributes of class rectangle

public void Rectangle(){ ///constructor to initialize default values to the attributes

length = 1.0f;

width = 1.0f;

}

   

public float perimeter(){ //member functions

return 2*(length+width);

}

public float area(){

return (length*width);

}

   

public void setLength(float len)

{

if(len >0.0f && len <20.0f)

length = len;

else

System.out.println("Invalid Length");

}

public void setWidth(float wid)

{

if(wid >0.0f && wid <20.0f)

width = wid;

else

System.out.println("Invalid width");

}

public float getLength(){

return length;

}

public float getWidth(){

return width;

}

}

 

 

 

 

import java .util.*;

public class Main

{

   public static void main(String[] args) {

   Rectangle obj = new Rectangle(); //object of class rectangle

   Scanner sc = new Scanner (System.in);

   float len,width;

       System.out.println("Enter the length of the Rectangle");

       len = sc.nextFloat();

       System.out.println("Enter the width of the Rectangle");

       width = sc.nextFloat();

       obj.setLength(len); //setting values to attributes of class rectangle

       obj.setWidth(width);

       System.out.println("Length of the triangle is : "+obj.getLength());

       System.out.println("Width of the triangle is : "+obj.getWidth());

       System.out.println("Area of the triangle is : "+obj.area());

       System.out.println("Perimeter of the triangle is : "+obj.perimeter());

   }

}

Answer 2

Write an enum type TrafficLight, whose constants (RED, GREEN, YELLOW) take one parameter—the duration of the light. Write a program to test the TrafficLight enum so that it displays the enum constants and their durations.