Java Programming Challenges | Feel free to pick any challenge that interests you and start coding! Happy coding! 🚀

[shinigami212]

Hi 👋, I'm Nitesh Kumar

A passionate frontend developer from India

Languages and Tools:

Java Programming Challenges

Welcome to a collection of fundamental Java programming challenges! These exercises are designed to help you practice and improve your Java programming skills. Each challenge comes with a brief description and a code snippet to get you started.

Basic Concepts

1. Hello, World!: Print "Hello, World!" to the console.

2. Sum of Two Numbers: Calculate and display the sum of two numbers.

3. Product of Two Numbers: Calculate and display the product of two numbers.

4. Factorial: Find and display the factorial of a given number.

5. Even or Odd: Check if a number is even or odd.

6. Prime Number Check: Check if a number is prime.

7. Largest Among Three: Find and display the largest among three numbers.

8. Smallest Among Three: Find and display the smallest among three numbers.

Mathematical Operations

9. Square Root: Calculate and display the square root of a number.

10. Power: Calculate and display the result of a^b.

11. Sum of Even Numbers: Find and display the sum of all even numbers between 1 and N.

12. Sum of Odd Numbers: Find and display the sum of all odd numbers between 1 and N.

13. Average of N Numbers: Calculate and display the average of N numbers.

14. GCD (Greatest Common Divisor): Find and display the GCD of two numbers.

15. LCM (Least Common Multiple): Find and display the LCM of two numbers.

String Manipulation

16. Reverse a String: Reverse and display a given string.

17. Palindrome Check: Check if a string is a palindrome.

18. Count Vowels and Consonants: Count and display the number of vowels and consonants in a string.

19. Convert to Uppercase: Convert a lowercase string to uppercase.

20. Convert to Lowercase: Convert an uppercase string to lowercase.

21. String Length: Calculate and display the length of a string.

22. String Concatenation: Concatenate two strings.

23. Substring Check: Check if a string contains a specific substring.

24. Remove Spaces: Remove spaces from a string.

25. Count Words: Count the number of words in a string.

Array Manipulation

26. Largest Element: Find and display the largest element in an array.

27. Smallest Element: Find and display the smallest element in an array.

28. Sum of Array Elements: Calculate and display the sum of all elements in an array.

29. Average of Array Elements: Calculate and display the average of elements in an array.

30. Element Search: Search for an element in an array.

31. Ascending Sort: Sort an array in ascending order.

32. Descending Sort: Sort an array in descending order.

33. Second Largest Element: Find and display the second largest element in an array.

34. Second Smallest Element: Find and display the second smallest element in an array.

Advanced Topics

35. Fibonacci Series: Generate and display the Fibonacci series up to N terms.

36. Binary Search: Implement a binary search algorithm.

37. Triangle Area: Calculate and display the area of a triangle given its base and height.

38. Circle Area: Calculate and display the area of a circle given its radius.

39. Rectangle Area: Calculate and display the area of a rectangle given its length and width.

40. Square Area: Calculate and display the area of a square given its side length.

Number Conversions

41. Decimal to Binary: Convert a decimal number to binary.

42. Binary to Decimal: Convert a binary number to decimal.

43. Decimal to Hexadecimal: Convert a decimal number to hexadecimal.

44. Hexadecimal to Decimal: Convert a hexadecimal number to decimal.

45. Sum of Digits: Calculate and display the sum of digits of a number.

46. Product of Digits: Calculate and display the product of digits of a number.

47. Palindrome Check for Numbers: Check if a number is a palindrome.

48. Prime Factors: Find and display the prime factors of a number.

Bonus Challenge

49. Simple Calculator: Implement a simple calculator (addition, subtraction, multiplication, division).

Feel free to pick any challenge that interests you and start coding! Happy coding! 🚀

[niteshk700]

please assign me

[Chiragchandel2000]

Please assign me.

[aumiidutta]

I have knowledge of Java, please assign this issue to me, as I would like to add the solution to challenge 16

[Tanishaclippy]

Please assign me the 17th problem statement

[Kraken005]

Please assign me this issue. I wish to contribute. @shinigami212

[aumiidutta]

Hello @shinigami212 , I was going through my Hacktoberfest profile and I saw that this repository is excluded from Hacktoberfest 2023!