Beginner Java Coding Problems

Introduction

This section provides in-depth, beginner-friendly Java solutions to real coding problems from HackerRank. These challenges are often used in technical interviews, bootcamp exercises, and computer science courses, making them ideal practice for both learning and career prep.

Instead of just giving you the code, each walkthrough is designed to help you understand the thinking, strategy, and logic behind the solution — so you actually learn how to code, not just copy it. Whether you're preparing for a technical interview or starting from scratch, this series will help you build confident, transferable problem-solving skills.

What’s Included in Each Solution Post

Each solution follows a consistent structure to make learning clear and repeatable. Here's what you’ll find in every post:

Problem Description
We paraphrase the official problem in plain English, so it's easier to understand what you're actually being asked to do.
Initial Reasoning
Before writing code, we walk through how to approach the problem — helping you develop your own thought process.
Pseudocode
A simple, step-by-step outline of the logic to follow — a helpful bridge between thinking and coding.
Commented Java Code
Clean, efficient Java with inline comments that explain what the code is doing — and more importantly, why it's doing it.
Link to the Original Problem
A direct link back to the original HackerRank problem, so you can try it yourself and test your solution.