How to create Jframe?

Question

How to create a basic programme that shows JFrame?
Please guide me.

Answer 1

Similarly,
public class ThePanel extends JPanel implements <insert list of listeners here>
}There are any number of things wrong with having a frame/panel subclass defined this way.
1. Often coders with any number of disparate buttons make their
frame or panel listener to them all:
public class ThePanel extends JPanel implements ActionListenerThen the actionPerformed method is a laundry list of if/then/elseifs. Ugh.
That's the perfect situation for specific action objects listening to specific controls.
2. Exposing implementation details: the fact that the panel is listening
to list selection is not part of the API for the panel, it's an implementation
detail, yet that's not what this reads as:
public class ThePanel extends JPanel implements ListSelectionListenerWhat's to stop other code from doing the following?
unrelatedList.addListSelectionListener(thePanel); //woops, thePanel wasn't meant to listen to *that* list.It's surprising what cruft people won't tolerate in other areas of code are
happy to commit in Swing code.
Message was edited by:
DrLaszloJamf