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diff --git a/libjava/javax/swing/AbstractSet.java b/libjava/javax/swing/AbstractSet.java
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+/* AbstractSet.java --
+   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 javax.swing;
+
+import java.util.*;
+
+/**
+ * Empty
+ *
+ * @author Ronald Veldema (rveldema@cs.vu.nl)
+ */
+public abstract class AbstractSet extends AbstractCollection implements Set
+{
+	boolean contained(Object []a1, Object b)
+	{
+		for (int i=0;i<a1.length;i++)
+		{
+			if (a1[i] == b)
+				return true;
+		}
+		return false;
+	}
+
+	public boolean equals(Object o)
+	{
+		if (! (o instanceof AbstractSet))
+			return false;
+		AbstractSet s = (AbstractSet) o;
+
+		if (s == this)
+			return true;
+
+		if (s.size() != size())
+			return false;
+
+		Object[] a1 = s.toArray();
+		Object[] a2 = toArray();
+
+		for (int i=0;i<a1.length;i++)
+		{
+			if (! contained(a2, a1[i]))
+				return false;
+		}
+		return true;
+	}
+
+	public int hashCode()
+	{
+		int hash = 0;
+		Object[] a1 = toArray();
+
+		if (a1 == null)
+			return 0;
+
+		for (int i=0; i<a1.length; i++)
+		{
+			hash += a1[i].hashCode();
+		}
+		return hash;
+	}
+
+	public boolean removeAll(Collection c)
+	{
+		return false;
+	}
+}