What is problem of my code to show the window " wellcom to java"

Question

https://code.sololearn.com/cY5CQngdgNnc/?ref=app

Answer 1

It's because on sololearn, most of the languages show only the console, including java. Meaning, that you can't use libraries like this. Sorry pal, try another app :(

Answer 2

Sololearn can add the libraries to this app?!! or can not do it at all ..?