title: What does Container.validate() method do?
body: <p>There seems to be many methods in Java awt <a href="http://java.sun.com/j2se/1.5.0/docs/api/java/awt/Container.html" rel="nofollow noreferrer">Container</a> class that are related to <em>validate</em>. Apparently they don't do data validation. Is it useful for a Swing developer in any cases? Some of the methods:
  validate(), invalidate(), validateTree(), isValid() etc.</p>