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diff --git a/libjava/gnu/java/awt/peer/gtk/GtkCheckboxGroupPeer.java b/libjava/gnu/java/awt/peer/gtk/GtkCheckboxGroupPeer.java
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+++ b/libjava/gnu/java/awt/peer/gtk/GtkCheckboxGroupPeer.java
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+/* GtkCheckboxGroupPeer.java - Wrap a CheckboxGroup
+   Copyright (C) 2002 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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 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 gnu.java.awt.peer.gtk;
+import java.awt.*;
+import java.awt.event.*;
+import java.util.*;
+
+// Note that there is no peer interface for a CheckboxGroup.  We
+// introduce our own in order to make it easier to keep a piece of
+// native state for each one.
+public class GtkCheckboxGroupPeer extends GtkGenericPeer
+{
+  // This maps from a CheckboxGroup to the native peer.
+  private static WeakHashMap map = new WeakHashMap ();
+
+  // Find the native peer corresponding to a CheckboxGroup.
+  public static synchronized GtkCheckboxGroupPeer
+      getCheckboxGroupPeer (CheckboxGroup group)
+  {
+    if (group == null)
+      return null;
+    GtkCheckboxGroupPeer nat = (GtkCheckboxGroupPeer) map.get (group);
+    if (nat == null)
+      {
+	nat = new GtkCheckboxGroupPeer ();
+	map.put (group, nat);
+      }
+    return nat;
+  }
+
+  private GtkCheckboxGroupPeer ()
+  {
+    // We don't need any special state here.  Note that we can't store
+    // a reference to the java-side CheckboxGroup.  That would mean
+    // they could never be collected.
+    super (null);
+  }
+
+  // Dispose of our native resources.
+  public native void dispose ();
+
+  // Remove a given checkbox from this group.
+  public native void remove (GtkCheckboxPeer box);
+
+  // When collected, clean up the native state.
+  protected void finalize ()
+  {
+    dispose ();
+  }
+}