128     }
 129 
 130     public V put(String key, V value) {
 131         return map.put(prefix + key, value);
 132     }
 133 
 134     public void putAll(Map<? extends String, ? extends V> t) {
 135         for (Iterator<? extends Entry<? extends String, ? extends V>> i = t.entrySet().iterator(); i.hasNext(); ) {
 136             Map.Entry<? extends String, ? extends V> e = i.next();
 137             String key = e.getKey();
 138             put(key, e.getValue());
 139         }
 140     }
 141 
 142     public V remove(Object key) {
 143         return map.remove(prefix + key);
 144     }
 145 
 146     public int size() {
 147         int n = 0;
 148         for (Iterator i = map.keySet().iterator(); i.hasNext(); ) {
 149             String key = (String) (i.next());
 150             if (key.startsWith(prefix))
 151                 n++;
 152         }
 153         return n;
 154     }
 155 
 156     public Collection<V> values() {
 157         Collection<V> c = new Vector<>();
 158         for (Iterator<Map.Entry<String, V>> i = map.entrySet().iterator(); i.hasNext(); ) {
 159             Map.Entry<String, V> e = i.next();
 160             String key = e.getKey();
 161             if (key.startsWith(prefix))
 162                 c.add(e.getValue());
 163         }
 164         return c;
 165     }
 166 
 167     private Map<String, V> map;
 168     private String prefix;
 169 }

 128     }
 129 
 130     public V put(String key, V value) {
 131         return map.put(prefix + key, value);
 132     }
 133 
 134     public void putAll(Map<? extends String, ? extends V> t) {
 135         for (Iterator<? extends Entry<? extends String, ? extends V>> i = t.entrySet().iterator(); i.hasNext(); ) {
 136             Map.Entry<? extends String, ? extends V> e = i.next();
 137             String key = e.getKey();
 138             put(key, e.getValue());
 139         }
 140     }
 141 
 142     public V remove(Object key) {
 143         return map.remove(prefix + key);
 144     }
 145 
 146     public int size() {
 147         int n = 0;
 148         for (Iterator<String> i = map.keySet().iterator(); i.hasNext(); ) {
 149             String key = (i.next());
 150             if (key.startsWith(prefix))
 151                 n++;
 152         }
 153         return n;
 154     }
 155 
 156     public Collection<V> values() {
 157         Collection<V> c = new Vector<>();
 158         for (Iterator<Map.Entry<String, V>> i = map.entrySet().iterator(); i.hasNext(); ) {
 159             Map.Entry<String, V> e = i.next();
 160             String key = e.getKey();
 161             if (key.startsWith(prefix))
 162                 c.add(e.getValue());
 163         }
 164         return c;
 165     }
 166 
 167     private Map<String, V> map;
 168     private String prefix;
 169 }