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Documentation

Complete guide to using the Online Java Compiler for all supported programming languages.

Getting Started
Quick start guide to begin coding immediately

1. Choose Your Language

Select from our supported programming languages:

JavaPythonC++JavaScriptCHTMLCSS

2. Write Your Code

Use our feature-rich code editor with syntax highlighting, line numbers, and auto-indentation.

3. Run and Test

Click the "Run Code" button to compile and execute your program instantly.

Supported Languages
Detailed information about each programming language

☕ Java

Full Java support with object-oriented programming features.

  • Classes and objects
  • Inheritance and polymorphism
  • Exception handling
  • Collections framework

🐍 Python

Python 3.x with extensive library support.

  • Object-oriented and functional programming
  • Built-in data structures
  • List comprehensions
  • Lambda functions

⚡ C++

Modern C++ with STL support.

  • Object-oriented programming
  • Templates and generics
  • Standard Template Library (STL)
  • Memory management

🟨 JavaScript

Modern JavaScript (ES6+) with Node.js runtime.

  • Arrow functions and async/await
  • Destructuring and spread operator
  • Promises and async programming
  • Modern JavaScript features

🔧 C

Standard C programming with GCC compiler.

  • Procedural programming
  • Pointers and memory management
  • Standard library functions
  • File I/O operations

🌐 HTML

HTML5 with validation and structure analysis.

  • Semantic HTML elements
  • Form validation
  • Accessibility features
  • Modern HTML5 APIs

🎨 CSS

CSS3 with modern features and validation.

  • Flexbox and Grid layouts
  • CSS variables and animations
  • Media queries for responsive design
  • Modern CSS features
Editor Features
Powerful code editing capabilities

Code Editor

  • Syntax highlighting
  • Line numbers
  • Auto-indentation
  • Code folding
  • Find and replace

File Management

  • Create multiple files
  • Import/Export files
  • Auto-save functionality
  • File renaming and deletion
  • Local storage persistence
Toolbar Actions
Available actions and their functions

Compile and execute your code with real-time output

Save your files locally (auto-save is enabled by default)

Share your code with others via URL

Customize editor settings, theme, and preferences

Tips & Best Practices
Get the most out of the online compiler

Performance Tips

  • Keep your code organized with proper indentation
  • Use meaningful variable and function names
  • Add comments to explain complex logic
  • Test your code with different inputs

Debugging

  • Use console.log() or print() statements for debugging
  • Check the output panel for compilation errors
  • Verify syntax highlighting for potential issues
  • Use proper error handling in your code