Java Programming

About Course

This course provides a comprehensive exploration of object-oriented programming, exception handling, collections, and multi-threading through hands-on programming exercises. Students will gain practical experience by writing programs that incorporate these essential elements of modern software development. By the end of this practical course, students will have the necessary skills, practical experience in java Programming.

Course Syllabus

Problems

Problem 1

Given an integer, perform the following conditional actions:

If is odd, print Weird
If is even and in the inclusive range of to , print Not Weird
If is even and in the inclusive range of to , print Weird
If is even and greater than , print Not Weird

Problem 2

For a given value N print no of multiples of 3,5 in the range [1,N]

Problem 3

Kristen loves playing with and comparing numbers. She thinks that if she takes two different positive numbers, the one whose digits sum to a larger number is better than the other. If the sum of digits is equal for both numbers, then she thinks the smaller number is better. For example, Kristen thinks that 13 is better than31 and that12 is better than 11. Given an integern, can you find the divisor of N that Kristin will consider to be the best? input: 12 output :6 The set of divisors of 12 can be expressed as {1,2,3,4,6,12}The divisor whose digits sum to the largest number is (which, having only one digit, sums to itself). Thus, we print as our answer.

Problem 4

print a hallow pyramid in following pattern.

       * * * * * * * * *  
       
         *           * 
         
           *       * 
           
             *   * 
             
               *

Problem 5

Ramu started collecting different types of flowers for prayer, he wants to pick only one flower for each type, if plants are arranged in multiple straight lines and flower type represented by positive numbers how many maximum type flowers he can collect.

input: 4 5 1 1 1 2 1 1 2 2 1 3 1 1 7 1 1 5 1 4 2 3

OUTPUT: 6

Problem 6

Given an array of characters chars, compress it using the following algorithm:

If the group’s length is 1, append the character to s
Otherwise, append the character followed by the group’s length

input: aabbccc

output: a2b2c3

Problem 7

Raju gifted a bicycle to his son Ramu, enthusiastic Ramu fixed a engine to it and made it as a motor bike, but being afraid of his father, in father presence he using it as cycle, otherwise as a bike, there is only one key(i. e. object of Ramu class) , prepare Ramu, Raju classes, both should have whatIAm( ) method, When Ramu class method is invoked it should print im a bike, im a cycle. (Hint: Inheritance, call parent class method using super in child class)

Problem 8

Create a class Sports which is having a method noOfPlayers(int n) for printing total players per team in that sport, Now create Soccer, VollyBall, Kabaddi classes which inherits Sports class and modifies the noOfPlayers(int n) method. call all the sports methods(use Over Riding/ Polymorphism )

Problem 9

Create a class PrimeGenerator which has a method primes(int n) which prints all prime numbers in range of n.

Problem 10

Write a Java program to create an abstract class Bird with abstract methods fly() and makeSound(). Create subclasses Eagle and Hawk that extend the Bird class and implement the respective methods to describe how each bird flies and makes a sound.

Problem 11

You are given an interface AdvancedArithmetic which contains a method signature int divisor_sum(int n). You need to write a class called MyCalculator which implements the interface.divisor_Sum() function just takes an integer as input and return the sum of all its divisors. For example divisors of 6 are 1, 2, 3 and 6, so divisor_sum should return 12.

Problem 12

You are required to compute the power of a number by implementing a calculator. Create a class MyCalculator which consists of a single method long power(int, int). This method takes two integers, n and p as parameters and finds n power p. If either or is negative, then the method must throw an exception which says “n or p should not be negative”. Also, if both and are zero, then the method must throw an exception which says “n or be should not be zero”.

Problem 13

Write a Java program that uses multithreading to print even and odd numbers alternatively. Create two threads: one to print even numbers along with their squres and another to print odd numbers along with cubes. The program should print the numbers from 1 to 20 in the following format: Thread-Even: 2 4 Thread-Odd: 1 1 Thread-Even: 4 16 Thread-Odd: 3 27

Problem 14

You are given pairs of strings. Two pairs (a, b) and(c, d) are identical if a=c and b=d . That also implies (a, b) is not same as (b, a) . After taking each pair as input, you need to print number of unique pairs you currently have(use HashSet).

input: 5 john tom john mary john tom mary anna mary anna

OUTPUT: 1 2 2 3 3

Problem 15

Given a string of size ‘n’. The task is to remove or delete the minimum number of characters from the string so that the resultant string is a palindrome.

Input : aebcbda

Output : 2 Remove characters ’e’ and ’d' Resultant string will be ‘abcba’which is a palindromic string

Problem 16

Print row wise sum of a Matrix. Example: Input: array[4][4] = { {1, 1, 1, 1}, {2, 2, 2, 2}, {3, 3, 3, 3}, {4, 4, 4, 4}};

Output: Sum of the 0 row is = 4 Sum of the 1 row is = 8 Sum of the 2 row is = 12 Sum of the 3 row is = 16