Online Java Compiler - Write, Run & Debug Java Programs Online
Run Java code online without installing JDK or setting up complex environment variables. RustcodeWeb Online Java Compiler provides instant execution for public class Main, interactive Scanner input, and full support for core Java collections.
Key Features of RustcodeWeb Online Java Compiler
- No JDK Installation Needed: Write and execute Java programs instantly in any web browser without installing Oracle JDK or OpenJDK.
- Interactive Scanner Input: Fully compatible with java.util.Scanner for reading console inputs, integers, doubles, and strings.
- Core Java Collections & Algorithms: Support for ArrayList, HashMap, Arrays.sort, Collections, StringBuilder, and object-oriented programming.
- Dual Dark & Light Theme: Switch effortlessly between developer-friendly Monokai dark mode and high-contrast TextMate light mode.
- Keyboard Shortcuts & Auto-Save: Press Ctrl+Enter to execute immediately; code is auto-saved locally so you never lose progress.
Frequently Asked Questions (FAQ)
- How do I run Java code online?
- Type your Java code inside the public class Main, supply any required input in the STDIN tab, and click 'Run'. The output displays in the terminal immediately.
- Do I need to name the main class 'Main'?
- Yes, the entry point for execution is 'public class Main' with 'public static void main(String[] args)'. Place your solution code inside.
- Does this Java compiler support Scanner input?
- Yes, standard input via Scanner(System.in) is fully supported. Enter your input in the STDIN tab or type directly into the console prompt.
- Is RustcodeWeb Java Compiler free?
- Yes, it is completely free with unlimited executions and zero hidden fees.
- Can I share my Java code online?
- Yes, click 'Share' to generate a unique link containing your code that anyone can open and run.
RUSTCODEWEBRCW
Java Compiler
Main.java
$ javac Main.java && java Main
Press Run or Ctrl+Enter to execute.
Custom Input
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