my question is if Java application allow to run any platforms but how to run on Android

Answer 1

I think that you can compile you app java but certainly SO android haven't integration with .jar or .java, in this case you can use android studio for compile and create an apk., or if you application is simple, you can run with another app for execute java files. I dont have a lot knowledge, its my opinion. sorry im not native english

Answer 2

java cant be executed as it is. it needs a jvm to be compiled first and each platform has its own jvm.you need to use software like Android studio, eclipse to run on Android.

Answer 3

Use android studio. sdk