FULL PRODUCT VERSION :
java version " 1.7.0_40-ea "
Java(TM) SE Runtime Environment (build 1.7.0_40-ea-b38)
Java HotSpot(TM) Server VM (build 24.0-b55, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Ubuntu 12.04, 3.2.0-52-generic-pae

A DESCRIPTION OF THE PROBLEM :
JFrame's getBounds() reports wrong bounds - not always, but often.
This makes it " impossible " to use this information to restore frame size and postion at next program startup.


REGRESSION. Last worked in version 6u45

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1) create a JFrame
2) set valid bounds
3) on windowClosing query bounds


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Without moving/resizing the window, getBounds() should report the bounds set before
ACTUAL -
Wrong result - example output from testprogram (bounds always set to 100,100,800,600):

bounds set to java.awt.Rectangle[x=100,y=100,width=800,height=600]
bounds on close java.awt.Rectangle[x=101,y=128,width=800,height=600]

bounds set to java.awt.Rectangle[x=100,y=100,width=792,height=599]
bounds on close java.awt.Rectangle[x=100,y=100,width=800,height=600]


REPRODUCIBILITY :
This bug can be reproduced often.

---------- BEGIN SOURCE ----------
import java.awt.EventQueue;
import java.awt.Rectangle;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;
import javax.swing.Timer;
import javax.swing.WindowConstants;

public class ErrJFrame
  extends JFrame {

  final Rectangle rStart;

  public ErrJFrame() {
    super( " test " );
    rStart = new Rectangle(100, 100, 800, 600);
    setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
    addWindowListener(new WindowAdapter() {
      @Override
      public void windowClosing(final WindowEvent e) {
        final Rectangle rb = getBounds();
        System.out.println( " bounds on close " + rb);
      }
    });
    setPreferredSize(rStart.getSize());
    setBounds();
    // --- " auto-close "
    final Timer t = new Timer(500, new ActionListener() {
      @Override
      public void actionPerformed(final ActionEvent e) {
        final WindowEvent wev =
          new WindowEvent(ErrJFrame.this, WindowEvent.WINDOW_CLOSING);
        Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(wev);
      }
    });
    t.setRepeats(false);
    t.start();
  }

  void setBounds() {
    setBounds(rStart);
    setVisible(true);
    System.out.println( " bounds set to " + getBounds());
  }

  public static void main(final String[] args) {
    EventQueue.invokeLater(new Runnable() {
      @SuppressWarnings( " unused " )
      @Override
      public void run() {
        new ErrJFrame();
      }
    });
  }
}

---------- END SOURCE ----------