How to run a ".class" file in my android

Answer 1

Android doesn't have JDK or JRE to run classes. It has Dalvik or ART, they are different and work with apk and dex files.
But maybe there are some third-party programs that emulate Java runtime

Answer 2

But I heard android also have jvm. Every machine has its own jvm

Answer 3

just download AIDE from google store its a java IDE compiler really good

Answer 4

Android is based on java but it has no (official) jre.
But you can download android studio, get into the concepts of writing android apps (its java, the programs are pnly launched differently).
You can easily use your .java file in android studio.

Answer 5

lol