Usar la aplicación APKPure
Obtener Java Compiler JPDK versión histórica en Android
Ahora ejecuta el código Java en los dispositivos Android.
An Online Java Compiler powered by ESS (Eagle Software Solutions).
An user can compile and execute their java code on any android mobile having internet connection.
It is an JPDK - java portable development kit.
Now write your code on tablets or phones. Best way to learn and explore java.