Homework SourseImplement the following steps 1 Modify the class Rectangle f
Implement the following steps:
1. Modify the class Rectangle from chapter 9 such that it implements the Comparable interface. Comparable interface defines only one method, compareTo(). Read API documentation to learn the requirements for this method. Add a toString() method to help with the output.
2. Write an application that defines an array of 5 Rectangle objects. This application should initialize the 5 objects with different data and then sort the array by calling Arrays.sort() method. Finally, the application should display the sorted array. Arrays class is located in the java.util package.
Solution
Hi, PLease find my implementation.
Please let me know in case of any issue.
############ Rectangle.java ############
/**
* The Rectangle class stores and manipulates
* data for a rectangle.
*/
public class Rectangle implements Comparable<Rectangle>
{
private double length;
private double width;
/**
* Constructor
*/
public Rectangle(double len, double w)
{
length = len;
width = w;
}
/**
* The setLength method accepts an argument
* which is stored in the length field.
*/
public void setLength(double len)
{
length = len;
}
/**
* The setWidth method accepts an argument
* which is stored in the width field.
*/
public void setWidth(double w)
{
width = w;
}
/**
* The set method accepts two arguments
* which are stored in the length and width
* fields.
*/
public void set(double len, double w)
{
length = len;
width = w;
}
/**
* The getLength method returns the value
* stored in the length field.
*/
public double getLength()
{
return length;
}
/**
* The getWidth method returns the value
* stored in the width field.
*/
public double getWidth()
{
return width;
}
/**
* The getArea method returns the value of the
* length field times the width field.
*/
public double getArea()
{
return length * width;
}
@Override
public int compareTo(Rectangle o) {
if(getArea() < o.getArea())
return -1;
else if(getArea() > o.getArea())
return 1;
else
return 0;
}
@Override
public String toString() {
return \"Length: \"+length+\", Width: \"+width+\", Area: \"+getArea();
}
}
############## RectangleTest.java ###############
import java.util.Arrays;
public class RectangleTest {
public static void main(String[] args) {
// creating an array of Rectangle
Rectangle[] rectangles = {
new Rectangle(11, 5.7),
new Rectangle(8.0, 7.5),
new Rectangle(4, 5.5),
new Rectangle(6, 12.5),
new Rectangle(9.5, 3)
};
// sorting
Arrays.sort(rectangles);
// printing
for(Rectangle r : rectangles)
System.out.println(r);
}
}
/*
Sample run:
Length: 4.0, Width: 5.5, Area: 22.0
Length: 9.5, Width: 3.0, Area: 28.5
Length: 8.0, Width: 7.5, Area: 60.0
Length: 11.0, Width: 5.7, Area: 62.7
Length: 6.0, Width: 12.5, Area: 75.0
*/
