Ok. Task completed.
Gonna save here the links for Swing once again:
 - https://docs.oracle.com/javase/tutorial/uiswing/learn/index.html
 - https://docs.oracle.com/javase/tutorial/uiswing/components/index.html

My first Swing app in Java

Ok. So, my mentor gave me a task to create a Button with the label "Hello Nelly!".

I found a Swing tutorial to get started with it. Here it is. Gonna follow it and see how it goes. Lets start ...