JAVA PROGRAMMING

1. Create a Point class:

a) Create a new class called Point.

b) It should have 2 protected instance variables X and Y, with integer data type.

c) Create a default constructor which instantiates Point with X and Y equal to 0.

d) Create a 2-parameter constructor, which can pass a user defined X and Y, to create a Point object.

e) Create public getter and setter methods for the 2 protected instance variables.

f) Demonstrate that your constructors, getter and setter methods, all work by:

1) Creating 2 Point objects, 1 using the default constructor and the other by passing the parameters (Choose your own values for the parameters).

2) Using the getter methods to print the X and Y values for both Points.

3) Change the values of both instance variables of your second Point to 2, using the setter methods and print the new values to the screen.

2. Create a Shape class:

a. Create a new class called Shape. Do this in a new file.

b. It should have a protected String instance variables called name.

c. Create a single parameter constructor which can pass a name to create a Shape object.

d. Create a getter and setter method for this instance variable.

3. Create a Square subclass:

a. Create a subclass for the Shape class called square.

b. It should have 2 protected Point instance variables.

c. Create a 3-parameter constructor, which can pass a name, and 2 Point objects to create a Square object.

d. Create a getter method called getLength. This method should take the X values of the two Point objects in the Square, calculate the length of the square and return the value for length.

Hint: To ensure your height value is always positive, you can use the absolute value method (Math.abs())from the Math library built in to Java(java.lang.Math;).

e. Create a getter method called getHeight. This method should take the Y values of the two Point objects in the Square, calculate the height of the square and return the value for height.

f. Create a getter method called getArea. This method should calculate the area using the getHeight and getLength methods, then return the value of the area. Hint: Simply use the syntax getHeigth() and getLength() to obtain the values needed to calculate the area.

g. Create a getter method called getPerimeter. This method should calculate the perimeter using the getHeight and getLength methods, then return the value of the perimeter.

h. Demonstrate your class and methods work by creating a Square object using the 2 Point objects you created in Part 1 and a name of your choice. Print the length, height, area and perimeter of your Square object.

3. Create a Circle subclass:

a. Create a subclass for the Shape class called Circle.

b. It should have 2 protected instance variables, a Point (the center of your circle) and a radius.

c. Create a 3-parameter constructor which can pass a name, a Point object and a radius to create a Circle object.

d. Create a getter method which returns the value of the radius called getRadius.

e. Create a getter method that returns the center of your circle. Hint: You will be returning a Point object for this method.

f. Create a getter method called getArea. This method should calculate the area using the getRadius method and the value 3.14 for Pi. Then return the value of the area. Note: Since we are working with Pi, we will need to define our radius as a double. Simply redefine your radius in your method as a double.

g. Create a getter method called getCircumference. This method should calculate the circumference of your circle using the getRadius method and the value 3.14. Then, return the value of the circumference.

h. Demonstrate your class and methods work by creating a Circle object using the first Point object you created in Part 1, a radius of 1 and a name of your choice. Print the name, length, height, area and perimeter of your circle.

Note: Use a separate Java file for the each of the classes, subclasses and testing. In total, you should submit 5 Java files.

Sample Output: My first point is: 0,0 My second point is: 1,1 My second point is now: 2,2 The name of my square is: My Square The length of my square is: 2 The height of my square is: 2 The area of my square is: 4 The permiter of my square is: 8 The name of my circle is: My Circle The radius of my circle is:1 The center of my circle is at: 0,0 The area of my circle is: 3.14 The circumference of my circle is 6.28