--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/java/src/java/util/TreeSet.d	Fri Mar 13 16:57:07 2009 +0100
@@ -0,0 +1,136 @@
+module java.util.TreeSet;
+
+import java.lang.all;
+import java.util.SortedSet;
+import java.util.AbstractSet;
+import java.util.Collection;
+import java.util.Iterator;
+
+static import tango.util.container.SortedMap;
+
+class TreeSet : AbstractSet, SortedSet {
+
+    alias tango.util.container.SortedMap.SortedMap!(Object,int) SetType;
+    private SetType set;
+
+    public this(){
+        set = new SetType();
+    }
+    public this(Collection c){
+        implMissing( __FILE__, __LINE__ );
+    }
+    public this(Comparator c){
+        implMissing( __FILE__, __LINE__ );
+    }
+    public this(SortedSet){
+        implMissing( __FILE__, __LINE__ );
+    }
+
+    public bool    add(Object o){
+        return set.add(o, 0);
+    }
+    public bool    add(String o){
+        return add(stringcast(o));
+    }
+    public bool    addAll(Collection c){
+        foreach( o; c ){
+            add(o);
+        }
+        return true;
+    }
+    public void   clear(){
+        set.clear();
+    }
+    public bool    contains(Object o){
+        return set.containsKey(o);
+    }
+    public bool     contains(String o){
+        return contains(stringcast(o));
+    }
+    public bool    containsAll(Collection c){
+        foreach( o; c ){
+            if( !contains(o) ){
+                return false;
+            }
+        }
+        return true;
+    }
+    public Comparator     comparator(){
+        implMissing( __FILE__, __LINE__ );
+        return null;
+    }
+    public override int    opEquals(Object o){
+        implMissing( __FILE__, __LINE__ );
+        return 0;
+    }
+    public Object         first(){
+        implMissing( __FILE__, __LINE__ );
+        return null;
+    }
+    public override hash_t    toHash(){
+        implMissing( __FILE__, __LINE__ );
+        return 0;
+    }
+    public SortedSet      headSet(Object toElement){
+        implMissing( __FILE__, __LINE__ );
+        return null;
+    }
+    public bool    isEmpty(){
+        return set.isEmpty();
+    }
+    public Iterator   iterator(){
+        implMissing( __FILE__, __LINE__ );
+        return null;
+    }
+    public Object         last(){
+        implMissing( __FILE__, __LINE__ );
+        return null;
+    }
+    public bool    remove(Object o){
+        return false;
+    }
+    public bool remove(String key){
+        return remove(stringcast(key));
+    }
+    public bool    removeAll(Collection c){
+        implMissing( __FILE__, __LINE__ );
+        return false;
+    }
+    public bool    retainAll(Collection c){
+        implMissing( __FILE__, __LINE__ );
+        return false;
+    }
+    public int    size(){
+        return set.size();
+    }
+    public SortedSet      subSet(Object fromElement, Object toElement){
+        implMissing( __FILE__, __LINE__ );
+        return null;
+    }
+    public SortedSet      tailSet(Object fromElement){
+        implMissing( __FILE__, __LINE__ );
+        return null;
+    }
+    public Object[]   toArray(){
+        implMissing( __FILE__, __LINE__ );
+        return null;
+    }
+    public Object[]   toArray(Object[] a){
+        implMissing( __FILE__, __LINE__ );
+        return null;
+    }
+    public override String toString(){
+        implMissing( __FILE__, __LINE__ );
+        return null;
+    }
+
+
+    // only for D
+    public int opApply (int delegate(ref Object value) dg){
+        int localDg( ref Object key, ref int value ){
+            return dg( key );
+        }
+        return set.opApply(&localDg);
+    }
+}
+