J2SE Version (please include all output from java -version flag):
  java version "1.6.0-ea"
  Java(TM) 2 Runtime Environment, Standard Edition (build 1.6.0-ea-b47)
  Java HotSpot(TM) Client VM (build 1.6.0-ea-b47, mixed mode, sharing)

Does this problem occur on J2SE 1.4.x or 5.0.x ? Yes / No (pick one)
  Yes

Operating System Configuration Information (be specific):
  Microsoft Windows 2000 [Version 5.00.2195]

Bug Description:
  Maximizing JFrame's doesn't always work properly

  When using JFrame.setDefaultLookAndFeelDecorated(true); and trying to
  maximize a frame that is already the same size as it's maximum size,
  maximize does not work properly. When not using
  setDefaultLookAndFeelDecorated or when the frame is a different size to
  begin with it appears to work fine.

Steps to Reproduce (be specific):
  1) Run the code below
  2) Click on the maximize button
  (it should now show a minimize button and resizing edges like what would
   have been shown if you resized the frame between steps 1 and 2)

import static javax.swing.JFrame.*;
import javax.swing.*;
import java.awt.*;

public class Test {
  static {
    /** workaround for bug 4955840 */
    Toolkit.getDefaultToolkit().setDynamicLayout(true);
    System.setProperty("sun.awt.noerasebackground", "true");
   
    JFrame.setDefaultLookAndFeelDecorated(true);
  }

  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
    Rectangle bounds = new Rectangle(100, 100, 500, 500);
    frame.setMaximizedBounds(bounds);
    frame.setBounds(bounds);
    frame.setVisible(true);
  }
}