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IDE Setup Guide

Learn how to set up your favorite IDE to run LeetCode solutions locally

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Java Setup in IntelliJ

  1. Install JDK (Java Development Kit) 11 or higher from adoptium.net
  2. Open IntelliJ IDEA and create a new project (File → New → Project)
  3. Select "Java" and configure your JDK
  4. Choose your project location and click "Create"
  5. Right-click on src folder → New → Java Class
  6. Name it exactly as specified in the problem (e.g., "TwoSumSolution")
  7. Copy the complete solution code and paste it, replacing the entire file content
  8. Click the green arrow next to the main method or press Shift+F10 to run

✅ IntelliJ automatically handles classpath and compilation for you!

General Tips for Running LeetCode Solutions

  • • Always check that the filename matches the class name (for Java)
  • • Use the exact test cases provided in the problem to verify your solution
  • • Add print statements to debug and understand the algorithm flow
  • • For linked list problems, you'll need to implement the ListNode class
  • • For tree problems, you'll need to implement the TreeNode class