Course Name : Programming Java
Course Code : CSC 384
Faculty’s Name : Rubayea Ferdows
Section : A & B
List of Programs for Lab Report
1. Implement inheritance
● Create a class Calculation that has an integer variable z, method addition(int x,
int y) that assigns the addition of x and y to z and print the value of z. Method
Subtraction(int x, int y) that assigns the subtraction of x and y to z and prints
the value of z.
● Create class My_Calculation that extends from Calculation. My_Calculation
will have a method multiplication(int x, int y) that assigns the multiplication of
x and y to z and prints the value of z.
● Write main method in which create objects of My_Calculation and call
addition, Subtraction and multiplication methods using the object.
2. Define a Super class named Point containing: - An instance variable named x of type
int. - An instance variable named y of type int. - Declare a method named
toString()Returns a string representation of the point. - Constructor that accepts values
of all data members as arguments. Define a Subclass named Circle. A Circle object
stores a radius (double) and inherits the (x, y) coordinates of its center from its superclass
Point. Each Circle object should have the following public methods:
● Circle(x, y, radius) Constructs a new circle with a center specified by the given
coordinators x,y and with the given double radius.
● getArea()
Returns the area occupied by the circle, using the formula πr2.
● getCircumference()
Returns the circle's circumference (distance around the circle), using the formula
2πr.
● toString()
Returns a string representation of the circle, such as "Circle[center=(75, 20);
radius=30]".
3. Write a program that prompts a user for a String and prints the reverse of the String.
● Enter a String: reverse
● The reverse of the String "reverse" is "esrever".
4. Abstract Class A contains array1 and array2 methods where none of them have
definition. Create a child class C that will have the body for the two array methods of 2
dimensions. And then create a method called multiply inside Class C that will multiply
the two dimensional arrays
5. Interface A has 2 methods. One of them will take the user input of a number and another
method will identify whether the number is an automorphic number or not. Interface B
also has two methods where in the same way one of them will take user input another
will check whether the number is duck number or not. class C will implement all 4
methods
6. Student A has given the admission test. If the mark is less than 40 then the program will
throw arithmetic exceptions. But if the mark is 40 or more then the numbers of Math and
Physics will be checked individually. If the mark is 20 in each subject then the student
can get the admission in CSE dept. But for none of the subjects the student should get 0
or none of the subject questions should remain unanswered. Otherwise it will show
another exception.
7. Imagine a situation where you are driving a car. Your car has an automatic feature that
tells you if any car is approaching your car from the opposite direction. One day you
were running late for the office and started driving very fast and also took a shortcut on
the wrong side of the road. Suddenly a car approached you from the opposite direction as
you were on the wrong side. But due to the safety feature of your car you could avoid a
life taking accident. Though some scratches were there in your car but you were not
harmed because you got alarmed immediately before the crash occurred.
Now write a program using the oop feature of java that will have similarity with the
above scenario.
8. Write a program to implement the ATM machine transaction system
Features:
a) user can withdraw money (less than the total amount)
per transaction, the user gets the amount which is divisible by 500. and the minimum
amount in the account without withdrawal is 500
b) user can check balance
9. ABC Company has two types of employees - Manager and Programmer. Based on their
role they have separate job responsibilities. The company calculates the salary of their
employees. But the calculation formula for employees is different for different types of
roles.
10. Imagine in your home you have a single kitchen which is used by all of your family
members. You like to have bread and butter in your breakfast, your mother likes bread,
vegetables and tea, your sister likes to have noodles and mango juice. But each of you are
using the same kitchen everyday, only the preparation for each person is different.
11. Write a program for creating a Laptop. Name, Price, Processor, Ram and Hard drive
should be defined in base class . You need to inherit these functionalities in your program
and Print Details. All the laptops should have different name, price, processor, ram and
hard drives. Output:
Name : Lenovo
Price : $1000
Processor : i3
Ram : 2GB
HDD : 500G
*************************************
Name : Dell
Price : $1500
Processor : i5
Ram : 4GB
HDD : 1TB
*************************************
Name : Sony
Price : $2000
Processor : i9
Ram : 8GB
HDD : 1TB
*************************************
12. Write down codes using the following instructions. If it is not possible then explain why.
a. Write a class Animal with following properties:
Fields (with data type):
- height: int
- weight: float
Methods:
void walk() { System.out.println(“I walk on the street”);}
b. Write a get and set method for the fields of class Animal.
c. Write a class Bird that inherits from Animal class.
d. Write a constructor method for Bird class.
e. Write an interface FlyingBird with following properties:
Methods:
void fly() {System.out.println(“I fly in the sky”)}
f. Write a class Parrot that inherits Bird class and uses FlyingBird interface.
g. Write a static method display() that shows the following message: “I am Mithu!”.
h. Write a class Test. Inside the Test class create an object of Parrot class and call the
static method display().
13. Write a program that prompts a user for a String, counts the number of vowels,
consonants and digits (0-9) contained in the string and prints their number of
occurrence and the percentages (with 2 decimal digits).
Enter a String: testing12345
Number of vowels: 2 (16.67%)
Number of consonants: 5 (41.67%)
Number of digits: 5 (41.67%)
14. Write a program called SharedCounter.java in which 10 threads each increment a shared
int counter 10 times. When all the threads have finished, print the final value of the
counter. If the initial value is zero, do you always get 100? Arrange for your code to
sometimes print the wrong answer. (Hint: try using some well-placed calls to
Thread.yield() or Thread.sleep().)
15. Create your own exception class using the extends keyword. Write a constructor for this
class that takes a String argument and stores it inside the object with a String reference.
Write a method that prints out the stored String. Create a try-catch clause to exercise
your new exception.
