Answer 1

The Container component in a very important one because it gives you the ability to organize and group together the components you want.

https://examples.javacodegeeks.com/desktop-java/awt/create-a-container-example/

https://www.google.com/search?client=ms-android-hms-tmobile-us&ei=RXQ-WJuYOeHTjwSGvYboCg&q=java+containers+example&oq=java+containers+&gs_l=mobile-gws-serp.1.3.0l5.15094.15094.0.19989.1.1.0.0.0.0.424.424.4-1.1.0....0...1c.1j4.64.mobile-gws-serp..0.1.422.IvbkOL6lUB0#xxri=0

p.s. it's not what you ask, but how you ask.