JPanel not showing up

Question

Why is the UI not showing up in my code below:

public class GUI extends JPanel{

        public GUI(String name, String address, List reviews, Icon         


        

Answer 1

Panels just don't show up in Swing. They have to be added to windows. Create JFrame or JDialog and add your panel to it.

Answer 2

I guess JPanel cannot be a toplevel container. It has to be put inside a JFrame or JWindow to be shown

JFrame f=new JFrame();
f.add(test);
f.setVisible(true);

Answer 3

A JPanel isn't a top level container. You need to place that JPanel in a JDialog or JFrame. Make sure to add it to the content pane of that dialog or frame:

JFrame f = new JFrame();
f.getContentPane().add(test);