how to build java application programming interface

Question

please help me

Answer 1

What exactly do you want to know? How to write and implement an interface? Maybe you should finish the Java course first.

Answer 2

I guess you mean Graphical User Interface:
search for Swing Components or Java FX.
http://docs.oracle.com/javafx/2/overview/jfxpub-overview.htm
First one: older and simplier,
Second one: more modern feature rich.
Expect some learning curve for both.

If you feel that curve too hard, have a look at the Processing IDE and its G4P Gui Builder tool: it will get you up and running quickly and painless.
https://processing.org

Answer 3

download Android Studio ,it's free. From there you can write both the interface for your app (which is VERY easy in Android studio 1-3 hours of tutorials should get you going ) and the core OOP code for your app. (Which takes time to learn , mostly several weeks to learn the minimum fundamentals to write some easy codes) .

Answer 4

thanks