Java LeetCode Walkthrough Update — Problems 1 Through 15 Now Up

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Over the past couple of months, I’ve been going through the early part of the LeetCode list in Java, averaging about one or two problems a week. The first 15 are now all up, each with two Java solutions and clear explanations that focus on how things work, not just what to write. These are all free to read with no paywall.

The idea was to build a solid foundation that covers the early questions in a way that makes them useful for interview prep, learning the language, or just getting more comfortable with problem-solving in Java.

I’ll be continuing the series and adding more as I go. Future walkthroughs will be part of the paid tier, but these first 15 will stay free and open to everyone.

Here’s what’s available so far:

LeetCode #15: 3Sum — Solved in Java

LeetCode #14: Longest Common Prefix — Solved in Java

LeetCode #13: Roman to Integer — Solved in Java

LeetCode #12: Integer to Roman — Solved in Java

LeetCode #11: Container With Most Water — Solved in Java

LeetCode #10: Regular Expression Matching — Solved in Java

LeetCode #9: Palindrome Number — Solved in Java

LeetCode #8: String to Integer — Solved in Java

LeetCode #7: Reverse Integer — Solved in Java

LeetCode #6: Zigzag Conversion — Solved in Java

LeetCode #5: Longest Palindromic Substring — Solved in Java

LeetCode #4: Median of Two Sorted Arrays — Solved in Java

LeetCode #3: Longest Substring Without Repeating Characters — Solved in Java

LeetCode #2: Add Two Numbers — Solved in Java

LeetCode #1: Two Sum — Solved in Java