Can java work in android

Answer 1

There is a Java tutorial on this App.

Answer 2

Yes.
If you want to programm an android application you can do it in java.
If you only want to run some small code, get an emulator app (or code in sololearn)

Answer 3

How can we learn java easily?

Answer 4

Use sololearn and do coding challenges and small tasks. You can find a lot of beginner tasks online

Answer 5

Java uses JVM(java virtual machine) so any device that run jvm can run java - your pc, laptop, coffee machine, mobile phone, alarm clock, vending machine...