JAVA Challenges

Welcome to the Java Challenges repository! This repository is dedicated to presenting a variety of Java programming challenges along with their solutions. Each challenge is designed to test and enhance your understanding of Java, covering a wide range of topics and difficulty levels. The code in this repository is compatible with JDK 17.

What's Inside

Challenges: A collection of diverse Java programming problems.
Solutions: Detailed and well-documented solutions for each challenge.
Topics Covered:
- Basic Syntax and Control Structures
- Object-Oriented Programming
- Data Structures and Algorithms
- File I/O
- Concurrency
- Design Patterns
- and more!

How to Use

Browse Challenges: Navigate through the folders to find different challenges.
Try It Yourself: Attempt to solve the challenges on your own to improve your coding skills.
Review Solutions: Compare your solutions with the ones provided to learn new techniques and best practices.
Learn and Grow: Use the solutions to understand different approaches and deepen your Java knowledge.

Contributing

Feel free to contribute by submitting your own challenges or improving existing solutions. Please make sure to follow the contribution guidelines outlined in the repository.

Happy coding! If you have any questions or feedback, don't hesitate to reach out.

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Name		Name	Last commit message	Last commit date
Latest commit History 265 Commits
Challenge 01 Celsius to Fahrenheit		Challenge 01 Celsius to Fahrenheit
Challenge 02 Even Number Check		Challenge 02 Even Number Check
Challenge 03 Celsius to Fahrenheit		Challenge 03 Celsius to Fahrenheit
Challenge 04 Palindrome Check		Challenge 04 Palindrome Check
Challenge 05 Sum of Digits Calculation		Challenge 05 Sum of Digits Calculation
Challenge 06 Binary Search		Challenge 06 Binary Search
Challenge 07 FizzBuzz Algorithm		Challenge 07 FizzBuzz Algorithm
Challenge 08 Fibonacci Sequence Generation		Challenge 08 Fibonacci Sequence Generation
Challenge 09 Insertion Sort		Challenge 09 Insertion Sort
Challenge 10 Email Address Validation		Challenge 10 Email Address Validation
Challenge 11 Roman Numeral to Decimal Conversion		Challenge 11 Roman Numeral to Decimal Conversion
Challenge 12 Array Rotation		Challenge 12 Array Rotation
Challenge 13 Longest Increasing Subarray		Challenge 13 Longest Increasing Subarray
Challenge 14 Calculation of Unique Paths in a Grid		Challenge 14 Calculation of Unique Paths in a Grid
Challenge 15 Calculation of Intersection of Two Linked Lists		Challenge 15 Calculation of Intersection of Two Linked Lists
Challenge 16 Verification of Parentheses Balance		Challenge 16 Verification of Parentheses Balance
Challenge 17 Decimal to Binary Conversion		Challenge 17 Decimal to Binary Conversion
Challenge 18 Count Word Occurrences in a String		Challenge 18 Count Word Occurrences in a String
Challenge 19 Tri d'une liste d'objets personnalisés		Challenge 19 Tri d'une liste d'objets personnalisés
Challenge 20 Validation of an IP Address		Challenge 20 Validation of an IP Address
Challenge 21 Calculation of the Sum of Matrix Elements		Challenge 21 Calculation of the Sum of Matrix Elements
Challenge 22 Prime Number Verification		Challenge 22 Prime Number Verification
Challenge 23 Calculation of the Number of Vowels in a String		Challenge 23 Calculation of the Number of Vowels in a String
Challenge 24 Capitalize the First Letter of Each Word		Challenge 24 Capitalize the First Letter of Each Word
Challenge 25 Calculation of the Average of Digits in a Number		Challenge 25 Calculation of the Average of Digits in a Number
Challenge 26 Merge Two Sorted Arrays		Challenge 26 Merge Two Sorted Arrays
Challenge 27 Calculation of the Maximum Difference Between Two Elements in an Array		Challenge 27 Calculation of the Maximum Difference Between Two Elements in an Array
Challenge 28 Checking for the Presence of an Element in a Linked List		Challenge 28 Checking for the Presence of an Element in a Linked List
Challenge 29 Finding the Greatest Common Divisor (GCD)		Challenge 29 Finding the Greatest Common Divisor (GCD)
Challenge 30 Counting Character Occurrences in a String		Challenge 30 Counting Character Occurrences in a String
Challenge 31 Calculator		Challenge 31 Calculator
Challenge 32 A Linked List		Challenge 32 A Linked List
Challenge 33 Character Frequency Display		Challenge 33 Character Frequency Display
Challenge 34 Insert Stars in a String at Specific Positions		Challenge 34 Insert Stars in a String at Specific Positions
Challenge 35 Remove Character Occurrences		Challenge 35 Remove Character Occurrences
Challenge 36 Find the Smallest and Largest Word in a String		Challenge 36 Find the Smallest and Largest Word in a String
Challenge 37 Find the Smallest and Largest Word in a String		Challenge 37 Find the Smallest and Largest Word in a String
Challenge 38 Minimum Number from Given Sequence		Challenge 38 Minimum Number from Given Sequence
Challenge 39 Display the Shortest Path to Display a String on the Screen		Challenge 39 Display the Shortest Path to Display a String on the Screen
Challenge 40 Mirror Characters of a String		Challenge 40 Mirror Characters of a String
Challenge 41 Middle Node of a Linked List		Challenge 41 Middle Node of a Linked List
Challenge 42 Check if a Linked List is Circular		Challenge 42 Check if a Linked List is Circular
Challenge 43 Count Nodes in a Linked List		Challenge 43 Count Nodes in a Linked List
Challenge 44 Reverse a Doubly Linked List		Challenge 44 Reverse a Doubly Linked List
Challenge 45 Delete a Node in a Doubly Linked List		Challenge 45 Delete a Node in a Doubly Linked List
Challenge 46 Remove Duplicates from a Sorted Linked List		Challenge 46 Remove Duplicates from a Sorted Linked List
Challenge 47 Rotate a Doubly Linked List by N Nodes		Challenge 47 Rotate a Doubly Linked List by N Nodes
Challenge 48 Remove Duplicates from a Doubly Linked List		Challenge 48 Remove Duplicates from a Doubly Linked List
Challenge 49 Conversion from Prefix to Infix		Challenge 49 Conversion from Prefix to Infix
Challenge 50 Reverse a Stack		Challenge 50 Reverse a Stack
Challenge 51 Reverse a String Using a Stack		Challenge 51 Reverse a String Using a Stack
Challenge 52 Implement a Stack using Queues		Challenge 52 Implement a Stack using Queues
Challenge 53 Flatten a Linked List		Challenge 53 Flatten a Linked List
Challenge 54 Maximum Depth or Height of a Binary Tree		Challenge 54 Maximum Depth or Height of a Binary Tree
Challenge 55 Determine if Two Given Trees are Identical		Challenge 55 Determine if Two Given Trees are Identical
Challenge 56 Symmetric Tree		Challenge 56 Symmetric Tree
Challenge 57 Height-Balanced Binary Tree		Challenge 57 Height-Balanced Binary Tree
Challenge 58 Array to Balanced Binary Search Tree		Challenge 58 Array to Balanced Binary Search Tree
Challenge 59 Max Heap		Challenge 59 Max Heap
Challenge 60 Determine if One Array is a Subset of Another		Challenge 60 Determine if One Array is a Subset of Another
Challenge 61 Most Frequent Element in an Array		Challenge 61 Most Frequent Element in an Array
Challenge 62 Count Pairs with a Given Sum		Challenge 62 Count Pairs with a Given Sum
Challenge 63 Find the Number of Employees Under Each Manager		Challenge 63 Find the Number of Employees Under Each Manager
Challenge 64 Common Elements		Challenge 64 Common Elements
Challenge 65 Swap the Major and Minor Diagonals of a Square Matrix		Challenge 65 Swap the Major and Minor Diagonals of a Square Matrix
Challenge 66 Check if a Matrix is Idempotent		Challenge 66 Check if a Matrix is Idempotent
Challenge 67 Matrix Mirror Across Diagonal		Challenge 67 Matrix Mirror Across Diagonal
Challenge 68 Matrix Multiplication		Challenge 68 Matrix Multiplication
Challenge 69 Find Pairs with a Given Sum		Challenge 69 Find Pairs with a Given Sum
Challenge 70 Circular Rotations of Matrix Rows		Challenge 70 Circular Rotations of Matrix Rows
Challenge 71 Selection of Activities		Challenge 71 Selection of Activities
Challenge 72 Reach the n-th Step		Challenge 72 Reach the n-th Step
Challenge 73 Coin Change Problem		Challenge 73 Coin Change Problem
.gitattributes		.gitattributes
CODE_OF_CONDUCT.md		CODE_OF_CONDUCT.md
CONTRIBUTING.md		CONTRIBUTING.md
LICENSE		LICENSE
README.md		README.md
SECURITY.md		SECURITY.md

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