Java online coding platform
Compile and run Java programs in the cloud without a local JDK.
Start coding free →Java in the cloud, ready in under a minute.
Java is a high-level, object-oriented language built around the idea that code compiled once runs on any platform with a Java Virtual Machine. It is used for web applications, Android development, enterprise software, and games. A RunCode workspace gives you the JDK and VS Code preinstalled, so you can compile and run Java programs in under a minute.
Open a Java workspace →Write once, run anywhere
Java compiles to bytecode that runs on the JVM, so the same compiled output works on any device or operating system that has a JVM installed. This portability has made Java a long-running choice for enterprise applications, Android apps, and backend services. Its object-oriented model and strong type system help structure large codebases and keep them maintainable over time.
What you get on RunCode for Java
- JDK preinstalled with javac and java
- VS Code in the browser with Java extension
- Terminal for compiling and running programs
- Git integration for GitHub, GitLab, and Bitbucket
- Workspace ready in under a minute
Need to run Java inside your own app?
OnlineCompiler.io, our code execution API, runs the Java your app sends it and returns the output, exit code, CPU time and memory. Each run gets a fresh sandbox, and the first 100,000 requests a month are free.