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diff --git a/songdbj/org/tritonus/share/StringHashedSet.java b/songdbj/org/tritonus/share/StringHashedSet.java
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+++ b/songdbj/org/tritonus/share/StringHashedSet.java
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+/*
+ *      StringHashedSet.java
+ *
+ *      This file is part of Tritonus: http://www.tritonus.org/
+ */
+
+/*
+ *  Copyright (c) 2000 by Florian Bomers <http://www.bomers.de>
+ *
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Library General Public License as published
+ *   by the Free Software Foundation; either version 2 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program 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 Library General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Library General Public
+ *   License along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+/*
+|<---            this code is formatted to fit into 80 columns             --->|
+*/
+
+package org.tritonus.share;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Iterator;
+
+import org.tritonus.share.ArraySet;
+
+
+/**
+ * A set where the elements are uniquely referenced by their
+ * string representation as given by the objects toString()
+ * method. No 2 objects with the same toString() can
+ * be in the set.
+ * <p>
+ * The <code>contains(Object elem)</code> and <code>get(Object elem)</code>
+ * methods can be called with Strings as <code>elem</code> parameter.
+ * For <code>get(Object elem)</code>, the object that has been added
+ * is returned, and not its String representation.
+ * <p>
+ * Though it's possible to store
+ * Strings as objects in this class, it doesn't make sense
+ * as you could use ArraySet for that equally well.
+ * <p>
+ * You shouldn't use the ArrayList specific functions
+ * like those that take index parameters.
+ * <p>
+ * It is not possible to add <code>null</code> elements.
+ */
+
+public class StringHashedSet<E> extends ArraySet<E>
+{
+        public StringHashedSet()
+        {
+                super();
+        }
+
+        public StringHashedSet(Collection<E> c)
+        {
+                super(c);
+        }
+
+        public boolean add(E elem)
+        {
+                if (elem==null) {
+                        return false;
+                }
+                return super.add(elem);
+        }
+
+        public boolean contains(Object elem)
+        {
+                if (elem==null) {
+                        return false;
+                }
+                String comp=elem.toString();
+                Iterator<E> it=iterator();
+                while (it.hasNext()) {
+                        if (comp.equals(it.next().toString())) {
+                                return true;
+                        }
+                }
+                return false;
+        }
+
+        public E get(E elem) {
+                if (elem==null) {
+                        return null;
+                }
+                String comp=elem.toString();
+                Iterator<E> it=iterator();
+                while (it.hasNext()) {
+                        E thisElem=it.next();
+                        if (comp.equals(thisElem.toString())) {
+                                return thisElem;
+                        }
+                }
+                return null;
+        }
+}
+
+/*** StringHashedSet.java ***/