JPanel : Java Glossary

by Roedy Green ©1996-2009 Canadian Mind Products
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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 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 as:

mypanel.setBorder( BorderFactory.createEtchedBorder ( EtchedBorder.LOWERED ) );

Using JPanel

JPanel as Canvas

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

Learning More

Sun’s Javadoc on the JPanel class : available:

on the web at java.sun.com
in the current JDK 1.6.0_14 or in the old JDK 1.5.0_19 on your local Windows J: drive.

Sun’s tutorial on JPanel

AWT
Border
Canvas
JSplitPane
layout
LayoutManager
Panel
Swing

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