LeetCode Solutions in Java

This repository contains Java solutions to selected problems.

Structure

Each problem is placed in its own package.

Solved Problems

Title	Solution	Test	Notes
Anagram Checker	AnagramChecker.java	AnagramCheckerTest.java	Case-insensitive comparison using HashMap
Group Anagrams	GroupAnagrams.java	GroupAnagramsTest.java	Solved using sorting and character counting
Product of Array Except Self	ProductOfArrayExceptSelf.java	ProductOfArrayExceptSelfTest.java	Brute-force and optimized prefix/suffix product approach
String To Integer (atoi)	StringToIntAtoi.java	StringToIntAtoiTest.java	Solved without using exceptions; null → NullPointerException.
Top K Frequent Elements	TopKFrequentElements.java	TopKFrequentElementsTest.java	Solved using heap-based (PriorityQueue) and bucket sort approaches
Two Sum	TwoSumHashMap.java, TwoSumBruteForce.java	TwoSumHashMapTest.java, TwoSumBruteForceTest.java	Solved using HashMap and brute-force approaches

Testing

1. Make sure you have JDK 17+ and Maven installed.
2. Clone the repository:

git clone https://github.com/maikelsalazar/leetcode-java.git
cd leetcode-java

3. Run the tests:

mvn test