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diff --git a/libjava/classpath/javax/swing/border/AbstractBorder.java b/libjava/classpath/javax/swing/border/AbstractBorder.java
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+/* AbstractBorder.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.border;
+
+import java.awt.Component;
+import java.awt.Graphics;
+import java.awt.Insets;
+import java.awt.Rectangle;
+import java.io.Serializable;
+
+
+/**
+ * An invisible zero-width border, serving as a base class for
+ * implementing more interesting borders.
+ *
+ * @author Sascha Brawer (brawer@dandelis.ch)
+ * @author Ronald Veldema (rveldema@cs.vu.nl)
+ */
+public abstract class AbstractBorder
+  implements Border, Serializable
+{
+  static final long serialVersionUID = -545885975315191844L;
+
+
+  /**
+   * Constructs a new AbstractBorder.
+   */
+  public AbstractBorder ()
+  {
+  }
+
+
+  /**
+   * Performs nothing, because the default implementation provided by
+   * this class is an invisible, zero-width border. Subclasses will
+   * likely want to override this method, but they are not required
+   * for doing so.
+   *
+   * @param c the component whose border is to be painted.
+   * @param g the graphics for painting.
+   * @param x the horizontal position for painting the border.
+   * @param y the vertical position for painting the border.
+   * @param width the width of the available area for painting the border.
+   * @param height the height of the available area for painting the border.
+   */
+  public void paintBorder (Component c, Graphics g,
+                           int x, int y, int width, int height) 
+  {
+    /* A previous version of Classpath had emitted a warning when
+     * this method was called. The warning was removed because it is
+     * perfectly legal for a subclass to not override the paintBorder
+     * method. An example would be EmptyBorder.
+     */
+  }
+
+
+  /**
+   * Measures the width of this border.
+   *
+   * @param c the component whose border is to be measured.
+   *
+   * @return an Insets object whose <code>left</code>, <code>right</code>,
+   *         <code>top</code> and <code>bottom</code> fields indicate the
+   *         width of the border at the respective edge, which is zero
+   *         for the default implementation provided by AbstractButton.
+   *
+   * @see #getBorderInsets(java.awt.Component, java.awt.Insets)
+   */
+  public Insets getBorderInsets (Component c)
+  {
+    return new Insets (0, 0, 0, 0);
+  }
+
+
+  /**
+   * Determines the insets of this border. The implementation provided
+   * by AbstractButton sets the <code>left</code>, <code>right</code>,
+   * <code>top</code> and <code>bottom</code> fields of the passed
+   * <code>insets</code> parameter to zero.
+   *
+   * @param c the component whose border is to be measured.
+   *
+   * @return the same object that was passed for <code>insets</code>.
+   *
+   * @see #getBorderInsets()
+   */
+  public Insets getBorderInsets (Component c, Insets insets) 
+  {
+    insets.left = insets.right = insets.top = insets.bottom = 0;
+    return insets;
+  }
+
+
+  /**
+   * Determines whether or not this border is opaque. An opaque border
+   * fills every pixel in its area when painting. Partially
+   * translucent borders must return <code>false</code>, or ugly
+   * artifacts can appear on screen. The default implementation
+   * provided by AbstractBorder always returns <code>false</code>.
+   *
+   * @return <code>false</code>.
+   */
+  public boolean isBorderOpaque () 
+  {
+    return false;
+  }
+
+
+  /**
+   * Returns a rectangle that covers the specified area minus this
+   * border.  Components that wish to determine an area into which
+   * they can safely draw without intersecting with a border might
+   * want to use this helper method.
+   *
+   * @param c the component in the center of this border.
+   * @param x the horizontal position of the border.
+   * @param y the vertical position of the border.
+   * @param width the width of the available area for the border.
+   * @param height the height of the available area for the border.
+   */
+  public Rectangle getInteriorRectangle (Component c,
+                                         int x, int y, int width, int height) 
+  {
+    return getInteriorRectangle (c, this, x, y, width, height);
+  }
+
+  
+  /**
+   * Returns a rectangle that covers the specified area minus a
+   * border.  Components that wish to determine an area into which
+   * they can safely draw without intersecting with a border might
+   * want to use this helper method.
+   *
+   * @param c the component in the center of this border.
+   * @param x the horizontal position of the border.
+   * @param y the vertical position of the border.
+   * @param width the width of the available area for the border.
+   * @param height the height of the available area for the border.
+   */
+  public static Rectangle getInteriorRectangle (Component c, Border b,
+                                                int x, int y, int width, int height)
+  {
+    Insets borderInsets;
+
+    if (b != null)
+    {
+      borderInsets = b.getBorderInsets (c);
+      x += borderInsets.left;
+      y += borderInsets.top;
+      width -= borderInsets.left + borderInsets.right;
+      height -= borderInsets.top + borderInsets.bottom;
+    }
+
+    return new Rectangle (x, y, width, height);
+  }
+}