JavaPlayground

A ready-to-use Java development environment with GitHub Codespaces support.

Features

• Microsoft OpenJDK 21 pre-installed and configured
• VS Code Java Extension Pack with essential Java development tools
• Maven and Gradle support for project management
• Debugging capabilities with launch configurations
• Auto-formatting and code organization on save
• Sample Hello World application to get started quickly

Getting Started

Using GitHub Codespaces

1. Click the Code button on the GitHub repository page
2. Select Codespaces tab
3. Click Create codespace on main
4. Wait for the environment to be set up (this may take a few minutes)
5. Once ready, you'll have a fully configured Java development environment

Local Development

If you prefer to work locally, ensure you have:

• Java 21 or later installed
• VS Code with the Java Extension Pack

Running the Sample Application

1. Open the integrated terminal in VS Code
2. Navigate to the repository root
3. Compile and run the Hello World example:

# Compile the Java file
javac src/HelloWorld.java -d bin

# Run the compiled class
java -cp bin HelloWorld

Or use the VS Code debugging features:

• Open src/HelloWorld.java
• Press F5 to run with debugging
• Or use the "Run" code lens that appears above the main method

Project Structure

JavaPlayground/
├── .devcontainer/
│   └── devcontainer.json     # GitHub Codespaces configuration
├── .vscode/
│   ├── settings.json         # VS Code workspace settings
│   └── launch.json          # Debug configurations
├── src/
│   └── HelloWorld.java      # Sample Java application
├── .gitignore               # Git ignore patterns for Java projects
├── LICENSE                  # MIT License
└── README.md               # This file

Development Features

• IntelliSense: Smart code completion and error detection
• Debugging: Full debugging support with breakpoints
• Testing: Built-in support for JUnit and other testing frameworks
• Refactoring: Advanced refactoring tools
• Code Formatting: Automatic code formatting on save
• Import Management: Automatic import organization

Contributing

This is a playground repository for learning and experimenting with Java. Feel free to:

• Add your own Java examples
• Experiment with different Java features
• Practice coding exercises
• Test new libraries and frameworks

License

This project is licensed under the MIT License - see the LICENSE file for details.