OOPS-LAB

LAB 1

Create a class to represent points in 2D plane with proper constructors. Create objects of this class within the main():
a) in the same class
b) in a different class

LAB 2

A. Creat a class to represent stack (for integer data).
B. Now, create another class to evaluate any postfix expression (having +,-,*, / as operators and single digit numbers as operands. This class should use the above Stack class.

23+1 ===> 231+ (answer 7)

LAB 3

Create a single class to implement the following using suitable methods. a) Write a program to show whether the number is prime. Data will be taken from the command line argument. b) Write a program to show the prime numbers in a given range using the command line.
Write a program to display the Fibonacci series of length n (n is user input using Scanner class).
Take a String as input using a command line argument and check whether it is a palindrome.
Create a class named “DesignPattern” with different static methods to draw triangle, rectangle, and square using ‘*’. Demonstrate the class using the main method.

LAB 4

Q#1
A. Create a base class named "Person" with attributes like name and age. The class must have a proper constructor.
B. Create a subclass named "Employee" by inheriting the "Person" class. Add these attributes: employeeId and salary.
C. Demonstrate using the super keyword to call the superclass constructor from the subclass constructor.

Q#2
Create the following classes:
A. Person - to represent any common person having ID, name, gender, and date of birth.
B. Voter - to represent a valid voter (minimum 18 years old). The Voter class must have a method to register a person as a voter.
C. InvalidVoterException class which will be thrown when any person below 18 years is tried to register as a voter.
D. Now, create a suitable program which will do the following:

Create an array of n number of person objects.
create an array of m valid voters (m<n).
Implement voter registration which will demonstrate exceptions also.
List all registered voters.
List all invalid voters.

LAB 5

Write a Java program to create an abstract class named "Student". Now inherit the class and create two subclasses - CseStudent and ItStudent. The class must have an abstract method "giveExam()".
a) Now, within the main method, create objects of the instantiable classes and call the above-mentioned method on behalf of each object.
b) Can we create a single reference of the Student class to refer to CseStudent and then ItStudent? Write code and check.
create a Tic-Tac-Toe game. Use the following method as the base design. Update this method as per your requirements. public void drawGrid(){ System.out.println(" | | ");
System.out.println(" 1 | 2 | 3 ");
System.out.println(" | | ");
System.out.println("-----------------------"); System.out.println(" | | ");
System.out.println(" 4 | 5 | 6 ");
System.out.println(" | | ");
System.out.println("-----------------------"); System.out.println(" | | ");
System.out.println(" 7 | 8 | 9 ");
System.out.println(" | | "); }