fun with collections

classpath/java/util/Hashtable.java

@@ -0,0 +1,54 @@
+package java.util;
+
+public class Hashtable<K, V> implements Map<K, V> {
+  private final HashMap<K, V> map;
+
+  public Hashtable(int capacity) {
+    map = new HashMap(capacity);
+  }
+
+  public Hashtable() {
+    this(0);
+  }
+
+  public synchronized int size() {
+    return map.size();
+  }
+
+  public synchronized V get(K key) {
+    return map.get(key);
+  }
+
+  public synchronized V put(K key, V value) {
+    return map.put(key, value);
+  }
+
+  public synchronized V remove(K key) {
+    return map.remove(key);
+  }
+
+  public synchronized void clear() {
+    map.clear();
+  }
+
+  public Enumeration<K> keys() {
+    return new Collections.IteratorEnumeration(keySet().iterator());
+  }
+
+  public Enumeration<V> elements() {
+    return new Collections.IteratorEnumeration(values().iterator());
+  }
+
+  public Set<Entry<K, V>> entrySet() {
+    return new Collections.SynchronizedSet(this, map.entrySet());
+  }
+
+  public Set<K> keySet() {
+    return new Collections.SynchronizedSet(this, map.keySet());
+  }
+
+  public Collection<V> values() {
+    return new Collections.SynchronizedCollection(this, map.values());
+  }
+
+}