Canvas和JPanel之间的区别

Question

1. What is the difference between the Canvas class and the JPanel class, as far as graphics goes?
2. Are there any advantages or disadvantages to either of these classes?
3. I always use the Canvas class. Should I be using one class over the other? If so, why?

Answer 1

There are a few differences. JPanel:

1. is a Container, so you can add other Components to it
2. setBackground will automatically fill the background color
3. Set / Add tooltip
4. Add a Border
5. printComponent for printing

Fairly minor stuff, but sometimes important

Answer 2

Canvas: AWT JPanel: Swing

Swing is based on AWT, so Canvas can be more lightweight and in lower layer.

If canvas meet all your requirements, just use Canvas.

PS: I don't think there would be too much expensive to use JPanel, just choose the one you like.