Java is a powerful language, but it can be tricky to master. Here are some tips and tricks that can help you write better Java code.

🔄 Managing Multiple Java Versions

SDKMAN! is a powerful tool that makes managing multiple Java versions a breeze. It supports:

  • ✅ Multiple JDK distributions
  • ✅ Easy switching between versions
  • ✅ Project-specific Java versions
  • ✅ Automatic environment configuration

Quick Reference Commands

Here are the essential SDKMAN commands you’ll need:

Command Description
sdk install java 21-amz Install Amazon Corretto JDK 21
sdk use java 21-amzn Switch to JDK 21 temporarily
sdk default java 21-amzn Set JDK 21 as default
sdk list java Show all available/installed versions

📝 Example Usage

# Install a new JDK
sdk install java 21-amz

# Switch to the installed version
sdk use java 21-amzn

# List all available versions
sdk list java

💡 Pro Tips

  1. Use sdk env in your project directory to automatically switch to the right Java version
  2. Create a .sdkmanrc file to specify project-specific versions
  3. Use sdk current java to verify your active Java version