Example Java program: four (4) classes:  Main (where the main method is)  Shapes (Parent/Super class)  Square (Subclass)  Rectangle (Another Subclass) a) Add a new method in the base class of Shapes.java that prints a message, but don’t override it in the derived classes. Explain what happens. b) Now override it in one of the derived classes but not the others, and see what happens. c) Finally, override it in all the derived classes. d) Add a new type of Shape to Shapes.java and verify in main( ) that polymorphism works for your new type as it does in the old types.

Instructions-Java Assignment is to define a class named Address. The Address class will have three private instance variables: an int named street_number a String named street_name and a String named state. Write three constructors for the Address class: an empty constructor (no input parameters) that initializes the three instance variables with default values of your choice, a constructor that takes the street values as input but defaults the state to "Arizona", and a constructor that takes all three pieces of information as input Next create a driver class named Main.java. Put public static void main here and test out your class by creating three instances of Address, one using each of the constructors. You can choose the particular address values that are used. I recommend you make them up and do not use actual addresses. Run your code to make sure it works.  Next add the following public methods to the Address class and test them from main as you go: Write getters and…

6 Java

g) Make a class Class (as in a class of students, not a class as in a class of objects) that stores several Student objects. Store a list of students in an attribute called students. The initializer method should initialize the class as an empty class (no students). Implement a method add_student() that takes an object of class Student and adds it to class. Implement method pass_rate() that determines the fraction of students that pass the class (have a grade of >= 6). python code!!