Declare a class called Rectangle with data members length and width, a default constructor that initializes the length and width to zero, a set overloaded constructor that sets the rectangles length and width to valid values, set and get methods for length and width, a method that prints the name and current state of the object called toString(), a method called area() that calculates and returns the area, a method called perimeter() that calculates and returns the perimeter, and an equals() method that returns true if two Rectangle objects have the same state. Then write a test program in a separate file that fully tests the functionality of your class (you must test EACH method). Use the Circle class handout as a guide.

Rectangle UML Diagram

private int length;

private int width;

public Rectangle() // default constructor

public Rectangle(int l, int w) // overloaded constructor

public void setLength(int l) // set methods

public void setWidth(int w)

public int getLength() // get methods

public int getwidth()

public int area() // calculate and return area

public int perimeter() // calculate and return perimeter

public String toString() // print current state of object

public boolean equals(Rectangle r) // determine if same state