Is it always a bad idea to extend JFrame?

问题

When developing Java Swing GUIs, is it always a bad idea to extend JFrame? And what about JPanel, or other JComponents? Also, what makes it bad?

回答1:

Usually it's a rule of thumb to only subclass if you need to customize the Swing component.

来源：https://stackoverflow.com/questions/9742018/is-it-always-a-bad-idea-to-extend-jframe