Jre4Android-Java Runtime& J2ME

Coobbi

Contains ads

About this app

Jre4Android is a Java Runtime Environment (JRE) for Android that lets you run Java programs, old-school J2ME apps, and even desktop Swing GUI software — all directly on your phone. It also supports running JAR files in command-line (console) mode, making it useful for both developers and retro gamers.

✨ Key Features:

Run JAR files like java -jar xxx.jar

Run .class files directly (java Hello)

Run JARs in command-line (console) mode

Support for Java Swing GUI applications

Full support for J2ME (Java ME) JAR files & games

Run Spring Boot JARs on Android

Based on Java 17 (Pro version supports Java 21)

🎮 J2ME Support
Play your favorite classic Java ME mobile games and apps on Android.
Jre4Android also works as a J2ME emulator and runner, allowing you to launch MIDlet-based apps and enjoy retro mobile games seamlessly.

🖥 Swing GUI Support
Run desktop-style Swing applications with full graphical interface.

💻 Console Mode
Use Jre4Android just like a terminal to execute Java JARs and tools with command-line arguments.

👨‍💻 For Developers & Learners
Ideal for testing Java projects, running command-line tools, or learning Java programming on the go.

🔗 Pro Version (Java 21 Support)
For advanced users, check out Jre4Android Pro:
https://play.google.com/store/apps/details?id=com.coobbi.jre.pro

💬 Community Support
Questions or feedback? Join our community:
https://github.com/coobbi/Jre4android/discussions

This application includes functionality based on the open-source project J2ME-Loader (Apache License 2.0).

Ratings and reviews

Full 5 stars for simply existing! Can't resize an app. The scroll buttons are painful. Fast scroll on long-press would help a lot. No support for drag gesture. Left clicking is nicely implemented. Just hover the cursor where you want to click and then tap anywhere on the screen. I can't however find a way to right-click or control-click. It also seems to run in a continuous loop which drains the battery. Hopefully these will be addressed in time. Thank you so much for the much needed tool!

linkage error !it says that Jre4 Android supports upto java class file version 61; while I am using version 65; unable to run class file!i think you have to update your jre! any way nice effort!

I installed this app in an attempt to run the GpsPrune JAR on my phone and I'm impressed that it opens. Unfortunately the scaling is useless as it only applies to portrait view for some reason, which means you're left with a very small view of the program you're running. Then to add to that, when you click through the menus of whatever program you're running, e.g GpsPrune, the new popup windows are often halfway off the screen with no way to move them around. It's a good start though.

What's new

support 16kb page size