Java Local Development ☕️

This is a Sandbox environment to practice my Java skills. I'm following the NeetCode roadmap.

Execute the tests

Execute all the tests:

mvn clean test

Execute one specific test:

mvn test -Dtest=org.example.arrays.ContainsDuplicateTest

NeetCode roadmap

The NeetCode roadmap is a super useful guide designed to help you master coding interviews. It lays out a clear, step-by-step plan to learn important data structures and algorithms, starting from beginner-friendly concepts and working up to more advanced ones. The idea is to give you a structured path to follow, with curated problems from LeetCode that you can practice along the way.

All credit to Navdeep Singh.
Thank you 🙏 Navdeep for your work !

https://neetcode.io/roadmap

graph TD
    A(Arrays & Hashing)
    A --> C(Two Pointers)
    A --> E(Stack)
    C --> F(Binary Search)
    C --> D[Sliding Window]
    C --> G(Linked List)
    G --> H(Trees)
    F --> H
    H --> J[Heap & Priority Queue]
    J --> S(Intervals)
    J --> N(Greedy)
    J --> M(Advanced Graphs)
    K --> L[Graphs]
    H --> I(Tries)
    H --> K[Backtracking]
    K --> O(1-D DP)
    O --> P
    L --> M
    L --> R(Math & Geometry)
    L --> P(2-P DP)
    O --> Q(Bit Manipulation)
    Q --> R

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Problems

Arrays & Hashing

Problem	Difficulty	Java Class
Contains Duplicate	Easy	ContainsDuplicate.java
Valid Anagram	Easy	ValidAnagram.java
Two Sum	Easy	TwoSum.java
Group Anagrams	Medium	GroupAnagrams.java
Top K Frequent Elements	Medium	TopKFrequent.java
Encode and Decode Strings	Medium	EncodeDecode.java
Product of Array Except Self	Medium	ProductExcept.java
Valid Sudoku	Medium	ValidSudoku.java
Longest Consecutive Sequence	Medium	LongestConsecutiveSeq.java

Stack

Problem	Difficulty	Java Class
Valid Parentheses	Easy	ValidParentheses.java
Min Stack	Medium	MinStack.java
Evaluate Reverse Polish Notation	Medium	ReversePolish.java
Generate Parentheses	Medium	GenerateParentheses.java
Daily Temperatures	Medium	DailyTemperatures.java
Car Fleet	Medium	CarFleet.java
Largest Rectangle In Histogram	Hard	LargestRectangleInHistogram.java