JPanel : Java Glossary

JPanel

to make Applet or application layout easier, you break a frame up into regions and compose each of them separately. Each region is called a JPanel. Each can have its own different LayoutManager. The AWT (Advanced Windowing Toolkit) equivalent of JPanel is JPanel when you want a container and Canvas when you want something to draw on.

If your JPanel layouts are mysteriously scrambled, make sure you did an appropriate jPanel.setLayout.

JPanel Borders

JPanels don’t usually have any visible bounding lines, though they can with code such

Using JPanel

JPanel as Canvas

Here is a how you extend JPanel to create a custom component that you draw on.

Here is a slightly more complex example that does anti-aliasing. It draws an image like this:
Kohlberg’s six stages of moral development

Learning More

Oracle’s Javadoc on JPanel class : available:

on the web at Oracle.com
in the current JDK 1.7.0_02 or in the old JDK 1.6.0_30 on your local Windows J: drive.

Oracle’s tutorial on JPanel

AWT
Border
Canvas
JSplitPane
layout
LayoutManager
opaque
paintComponent
Panel
Swing
transparent

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