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diff --git a/libjava/classpath/javax/swing/Popup.java b/libjava/classpath/javax/swing/Popup.java
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+/* Popup.java --
+   Copyright (C) 2003 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.swing;
+
+import java.awt.Component;
+import java.awt.FlowLayout;
+import java.awt.Point;
+import java.awt.Rectangle;
+
+
+/**
+ * Manages a popup window that displays a Component on top of
+ * everything else.
+ *
+ * <p>To obtain an instance of <code>Popup</code>, use the
+ * {@link javax.swing.PopupFactory}.
+ *
+ * @since 1.4
+ *
+ * @author Sascha Brawer (brawer@dandelis.ch)
+ */
+public class Popup
+{
+  /**
+   * Constructs a new <code>Popup</code> given its owner,
+   * contents and the screen position where the popup
+   * will appear.
+   *
+   * @param owner the Component to which <code>x</code> and
+   *        <code>y</code> are relative, or <code>null</code> for
+   *        placing the popup relative to the origin of the screen.
+   *
+   * @param contents the contents that will be displayed inside
+   *        the <code>Popup</code>.
+   *
+   * @param x the horizontal position where the Popup will appear.
+   *
+   * @param y the vertical position where the Popup will appear.
+   *
+   * @throws IllegalArgumentException if <code>contents</code>
+   *         is <code>null</code>.
+   */
+  protected Popup(Component owner, Component contents,
+                  int x, int y)
+  {
+    if (contents == null)
+      throw new IllegalArgumentException();
+
+    // The real stuff happens in the implementation of subclasses,
+    // for instance JWindowPopup.
+  }
+
+
+  /**
+   * Constructs a new <code>Popup</code>.
+   */
+  protected Popup()
+  {
+    // Nothing to do here.
+  }
+
+
+  /**
+   * Displays the <code>Popup</code> on the screen.  Nothing happens
+   * if it is currently shown.
+   */
+  public void show()
+  {
+    // Implemented by subclasses, for instance JWindowPopup.
+  }
+
+
+  /**
+   * Removes the <code>Popup</code> from the screen.  Nothing happens
+   * if it is currently hidden.
+   */
+  public void hide()
+  {
+    // Implemented by subclasses, for instance JWindowPopup.
+  }
+
+
+  /**
+   * A <code>Popup</code> that uses a <code>JWindow</code> for
+   * displaying its contents.
+   *
+   * @see PopupFactory#getPopup
+   *
+   * @author Sascha Brawer (brawer@dandelis.ch)
+   */
+  static class JWindowPopup
+    extends Popup
+  {
+    /**
+     * The <code>JWindow</code> used for displaying the contents
+     * of the popup.
+     */
+    JWindow window;
+
+    private Component contents;
+
+    /**
+     * Constructs a new <code>JWindowPopup</code> given its owner,
+     * contents and the screen position where the popup
+     * will appear.
+     *
+     * @param owner the Component to which <code>x</code> and
+     *        <code>y</code> are relative, or <code>null</code> for
+     *        placing the popup relative to the origin of the screen.
+     *
+     * @param contents the contents that will be displayed inside
+     *        the <code>Popup</code>.
+     *
+     * @param x the horizontal position where the Popup will appear.
+     *
+     * @param y the vertical position where the Popup will appear.
+     *
+     * @throws IllegalArgumentException if <code>contents</code>
+     *         is <code>null</code>.
+     */
+    public JWindowPopup(Component owner, Component contents,
+                        int x, int y)
+    {
+      /* Checks whether contents is null. */
+      super(owner, contents, x, y);
+
+      this.contents = contents;
+      window = new JWindow(SwingUtilities.getWindowAncestor(owner));
+      window.getContentPane().add(contents);
+      window.setLocation(x, y);
+      window.setFocusableWindowState(false);
+    }
+
+
+    /**
+     * Displays the popup's <code>JWindow</code> on the screen.
+     * Nothing happens if it is already visible.
+     */
+    public void show()
+    {
+      window.setSize(contents.getSize());
+      window.show();
+    }
+
+
+    /**
+     * Removes the popup's <code>JWindow</code> from the
+     * screen.  Nothing happens if it is currently not visible.
+     */
+    public void hide()
+    {
+      /* Calling dispose() instead of hide() will conserve native
+       * system resources, for example memory in an X11 server.
+       * They will automatically be re-allocated by a call to
+       * show().
+       */
+      window.dispose();
+    }
+  }
+
+  /**
+   * A popup that displays itself within the JLayeredPane of a JRootPane of
+   * the containment hierarchy of the owner component.
+   *
+   * @author Roman Kennke (kennke@aicas.com)
+   */
+  static class LightweightPopup extends Popup
+  {
+    /**
+     * The owner component for this popup.
+     */
+    Component owner;
+
+    /**
+     * The contents that should be shown.
+     */
+    Component contents;
+
+    /**
+     * The X location in screen coordinates.
+     */
+    int x;
+
+    /**
+     * The Y location in screen coordinates.
+     */
+    int y;
+
+    /**
+     * The panel that holds the content.
+     */
+    private JPanel panel;
+
+    /**
+     * The layered pane of the owner.
+     */
+    private JLayeredPane layeredPane;
+
+    /**
+     * Constructs a new <code>LightweightPopup</code> given its owner,
+     * contents and the screen position where the popup
+     * will appear.
+     *
+     * @param owner the component that should own the popup window; this
+     *        provides the JRootPane in which we place the popup window
+     *
+     * @param contents the contents that will be displayed inside
+     *        the <code>Popup</code>.
+     *
+     * @param x the horizontal position where the Popup will appear in screen
+     *        coordinates
+     *
+     * @param y the vertical position where the Popup will appear in screen
+     *        coordinates
+     *
+     * @throws IllegalArgumentException if <code>contents</code>
+     *         is <code>null</code>.
+     */
+    public LightweightPopup(Component owner, Component  contents, int x, int y)
+    {
+      super(owner, contents, x, y);
+      this.owner = owner;
+      this.contents = contents;
+      this.x = x;
+      this.y = y;
+
+      JRootPane rootPane = SwingUtilities.getRootPane(owner);
+      JLayeredPane layeredPane = rootPane.getLayeredPane();
+      this.layeredPane = layeredPane;
+    }
+
+    /**
+     * Places the popup within the JLayeredPane of the owner component and
+     * makes it visible.
+     */
+    public void show()
+    {
+      // We insert a JPanel between the layered pane and the contents so we
+      // can fiddle with the setLocation() method without disturbing a
+      // JPopupMenu (which overrides setLocation in an unusual manner).
+      if (panel == null)
+        {
+          panel = new JPanel();
+          panel.setLayout(new FlowLayout(0, 0, 0));
+        }
+
+      panel.add(contents);
+      panel.setSize(contents.getSize());
+      Point layeredPaneLoc = layeredPane.getLocationOnScreen();
+      panel.setLocation(x - layeredPaneLoc.x, y - layeredPaneLoc.y);
+      layeredPane.add(panel, JLayeredPane.POPUP_LAYER, 0);
+      panel.repaint();
+    }
+
+    /**
+     * Removes the popup from the JLayeredPane thus making it invisible.
+     */
+    public void hide()
+    {
+      Rectangle bounds = panel.getBounds();
+      layeredPane.remove(panel);
+      layeredPane.repaint(bounds.x, bounds.y, bounds.width, bounds.height);
+    }
+  }
+}