I am using WindowBuilder and Swing. I am performing the following on a Swing JPanel:
java.awt.Container.setLayout()
java.awt.Container.removeAll()
java.awt.Container.add()
To finish I invoke:
java.awt.Container.validate()
but I noticed that javax.swing.JComponent.revalidate()
seems to do the same thing in practice. I have not observed any difference in behaviour. JPanel inherits from both Container and JComponent. How do I choose between them?
3 important differences:
JComponent#revalidate()
invalidates the component first which Container#validate()
does not do. JComponent#revalidate()
does not validate immediately, it adds the component to a list of invalid components and the RepaintManager
will validate components in batches. This can improve performance when lots of validations are required. JComponent#revalidate()
can be called from any thread, not just the event dispatch thread. Unless you need an immediate effect (which is only needed in special situations), JComponent#revalidate()
is preferrable.
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