diff --git a/classpath/java/util/AbstractCollection.java b/classpath/java/util/AbstractCollection.java
index f7e06bad32..248849876e 100644
--- a/classpath/java/util/AbstractCollection.java
+++ b/classpath/java/util/AbstractCollection.java
@@ -51,6 +51,21 @@ public abstract class AbstractCollection<T> implements Collection<T> {
     return false;
   }
 
+  public boolean containsAll(Collection<?> c) {
+    if (c == null) {
+      throw new NullPointerException("Collection is null");
+    }
+
+    Iterator<?> it = c.iterator();
+    while (it.hasNext()) {
+      if (! contains(it.next())) {
+        return false;
+      }
+    }
+
+    return true;
+  }
+
   public boolean isEmpty() {
     return size() == 0;
   }
@@ -60,6 +75,21 @@ public abstract class AbstractCollection<T> implements Collection<T> {
                                             + this.getClass().getName());
   }
 
+  public boolean removeAll(Collection<?> c) {
+    if (c == null) {
+      throw new NullPointerException("Collection is null");
+    }
+
+    boolean changed = false;
+
+    Iterator<?> it = c.iterator();
+    while (it.hasNext()) {
+      changed = remove(it.next()) || changed;
+    }
+
+    return changed;
+  }
+
   public abstract int size();
 
   public Object[] toArray() {
diff --git a/classpath/java/util/AbstractList.java b/classpath/java/util/AbstractList.java
index 87cbd6fb6e..7ec1b10927 100644
--- a/classpath/java/util/AbstractList.java
+++ b/classpath/java/util/AbstractList.java
@@ -20,6 +20,27 @@ public abstract class AbstractList<T> extends AbstractCollection<T>
     return true;
   }
 
+  public boolean addAll(Collection<? extends T> c) {
+    return addAll(size(), c);
+  }
+
+  public boolean addAll(int startIndex, Collection<? extends T> c) {
+    if (c == null) {
+      throw new NullPointerException("Collection is null");
+    }
+
+    int index = startIndex;
+    boolean changed = false;
+
+    Iterator<? extends T> it = c.iterator();
+    while (it.hasNext()) {
+      add(index++, it.next());
+      changed = true;
+    }
+
+    return changed;
+  }
+
   public Iterator<T> iterator() {
     return listIterator();
   }
diff --git a/classpath/java/util/Arrays.java b/classpath/java/util/Arrays.java
index 1bf35c1114..57d053d4db 100644
--- a/classpath/java/util/Arrays.java
+++ b/classpath/java/util/Arrays.java
@@ -91,36 +91,15 @@ public class Arrays {
   }
 
   public static <T> List<T> asList(final T ... array) {
-    return new List<T>() {
-      public String toString() {
-        return Collections.toString(this);
-      }
-
+    return new AbstractList<T>() {
       public int size() {
         return array.length;
       }
 
-      public boolean add(T element) {
-        throw new UnsupportedOperationException();
-      }
-
-      public boolean addAll(Collection<? extends T> collection) {
-        throw new UnsupportedOperationException();      
-      }
-
       public void add(int index, T element) {
         throw new UnsupportedOperationException();
       }
-
-      public boolean contains(Object element) {
-        for (int i = 0; i < array.length; ++i) {
-          if (equal(element, array[i])) {
-            return true;
-          }
-        }
-        return false;
-      }
-
+      
       public int indexOf(Object element) {
         for (int i = 0; i < array.length; ++i) {
           if (equal(element, array[i])) {
@@ -138,7 +117,7 @@ public class Arrays {
         }
         return -1;
       }
-
+      
       public T get(int index) {
         return array[index];
       }
@@ -147,41 +126,13 @@ public class Arrays {
         throw new UnsupportedOperationException();
       }
 
-      public Object[] toArray() {
-        return toArray(new Object[size()]);      
-      }
-
-      public <S> S[] toArray(S[] a) {
-        return (S[])array;
-      }
-
-      public boolean isEmpty() {
-        return size() == 0;
-      }
-
       public T remove(int index) {
-        throw new UnsupportedOperationException();        
-      }
-
-      public boolean remove(Object element) {
         throw new UnsupportedOperationException();
       }
 
-      public void clear() {
-        throw new UnsupportedOperationException();
-      }
-
-      public Iterator<T> iterator() {
-        return listIterator();
-      }
-
       public ListIterator<T> listIterator(int index) {
         return new Collections.ArrayListIterator(this, index);
       }
-
-      public ListIterator<T> listIterator() {
-        return listIterator(0);
-      }
     };
   }
 
diff --git a/classpath/java/util/Collection.java b/classpath/java/util/Collection.java
index c0ca5cbe5b..36505d6f09 100644
--- a/classpath/java/util/Collection.java
+++ b/classpath/java/util/Collection.java
@@ -17,12 +17,16 @@ public interface Collection<T> extends Iterable<T> {
 
   public boolean contains(Object element);
 
+  public boolean containsAll(Collection<?> c);
+
   public boolean add(T element);
 
   public boolean addAll(Collection<? extends T> collection);
 
   public boolean remove(Object element);
 
+  public boolean removeAll(Collection<?> c);
+
   public Object[] toArray();
 
   public <S> S[] toArray(S[] array);
diff --git a/classpath/java/util/Collections.java b/classpath/java/util/Collections.java
index acb94cb40d..fa522799e4 100644
--- a/classpath/java/util/Collections.java
+++ b/classpath/java/util/Collections.java
@@ -170,6 +170,14 @@ public class Collections {
     public Iterator<T> iterator() {
       return new SynchronizedIterator(lock, collection.iterator());
     }
+
+    public boolean containsAll(Collection<?> c) {
+      synchronized (lock) { return collection.containsAll(c); }
+    }
+
+    public boolean removeAll(Collection<?> c) {
+      synchronized (lock) { return collection.removeAll(c); }
+    }
   }
   
   static class SynchronizedMap<K,V> implements Map<K,V> {
@@ -393,6 +401,18 @@ public class Collections {
     public void clear() {
       throw new UnsupportedOperationException("not supported");
     }
+
+    public boolean removeAll(Collection<?> c) {
+      throw new UnsupportedOperationException("not supported");
+    }
+
+    public boolean addAll(int startIndex, Collection<? extends T> c) {
+      throw new UnsupportedOperationException("not supported");
+    }
+
+    public boolean containsAll(Collection<?> c) {
+      return inner.containsAll(c);
+    }
   }
 
   public static <K,V> Map<K,V> unmodifiableMap(Map<K,V> m) {
@@ -500,6 +520,14 @@ public class Collections {
 
     public <S> S[] toArray(S[] array) {
       return inner.toArray(array);
+    }
+
+    public boolean containsAll(Collection<?> c) {
+      return inner.containsAll(c);
+    }
+
+    public boolean removeAll(Collection<?> c) {
+      throw new UnsupportedOperationException("not supported");
     }     
   }
   
diff --git a/classpath/java/util/HashMap.java b/classpath/java/util/HashMap.java
index 2931b52300..da378d94b8 100644
--- a/classpath/java/util/HashMap.java
+++ b/classpath/java/util/HashMap.java
@@ -303,7 +303,7 @@ public class HashMap<K, V> implements Map<K, V> {
     }
   }
 
-  private class EntrySet implements Set<Entry<K, V>> {
+  private class EntrySet extends AbstractSet<Entry<K, V>> {
     public int size() {
       return HashMap.this.size();
     }
@@ -321,12 +321,6 @@ public class HashMap<K, V> implements Map<K, V> {
       return putCell(e.getKey(), e.getValue()) != null;
     }
 
-    public boolean addAll(Collection<? extends Entry<K, V>> collection) {
-      boolean change = false;
-      for (Entry<K, V> e: collection) if (add(e)) change = true;
-      return change;
-    }
-
     public boolean remove(Object o) {
       return (o instanceof Entry<?,?>) && remove((Entry<?,?>)o);
     }
@@ -352,7 +346,7 @@ public class HashMap<K, V> implements Map<K, V> {
     }
   }
 
-  private class KeySet implements Set<K> {
+  private class KeySet extends AbstractSet<K> {
     public int size() {
       return HashMap.this.size();
     }
@@ -369,12 +363,6 @@ public class HashMap<K, V> implements Map<K, V> {
       return putCell(key, null) != null;
     }
 
-    public boolean addAll(Collection<? extends K> collection) {
-      boolean change = false;
-      for (K k: collection) if (add(k)) change = true;
-      return change;
-    }
-
     public boolean remove(Object key) {
       return removeCell(key) != null;
     }
@@ -409,6 +397,21 @@ public class HashMap<K, V> implements Map<K, V> {
       return containsValue(value);
     }
 
+    public boolean containsAll(Collection<?> c) {
+      if (c == null) {
+        throw new NullPointerException("collection is null");
+      }
+      
+      Iterator<?> it = c.iterator();
+      while (it.hasNext()) {
+        if (! contains(it.next())) {
+          return false;
+        }
+      }
+      
+      return true;
+    }
+
     public boolean add(V value) {
       throw new UnsupportedOperationException();
     }
@@ -421,6 +424,10 @@ public class HashMap<K, V> implements Map<K, V> {
       throw new UnsupportedOperationException();
     }
 
+    public boolean removeAll(Collection<?> c) {
+      throw new UnsupportedOperationException();
+    }
+
     public Object[] toArray() {
       return toArray(new Object[size()]);      
     }
diff --git a/classpath/java/util/List.java b/classpath/java/util/List.java
index f29284206b..ceb555e395 100644
--- a/classpath/java/util/List.java
+++ b/classpath/java/util/List.java
@@ -21,6 +21,8 @@ public interface List<T> extends Collection<T> {
 
   public void add(int index, T element);
 
+  public boolean addAll(int startIndex, Collection<? extends T> c);
+
   public int indexOf(Object value);
 
   public int lastIndexOf(Object value);
diff --git a/classpath/java/util/TreeMap.java b/classpath/java/util/TreeMap.java
index 6100dbce80..cc8da2a320 100644
--- a/classpath/java/util/TreeMap.java
+++ b/classpath/java/util/TreeMap.java
@@ -120,7 +120,7 @@ public class TreeMap<K,V> implements Map<K,V> {
     
   }
 
-  private class KeySet implements Set<K> {
+  private class KeySet extends AbstractSet<K> {
     public int size() {
       return TreeMap.this.size();
     }
@@ -177,6 +177,21 @@ public class TreeMap<K,V> implements Map<K,V> {
       return containsValue(value);
     }
 
+    public boolean containsAll(Collection<?> c) {
+      if (c == null) {
+        throw new NullPointerException("collection is null");
+      }
+      
+      Iterator<?> it = c.iterator();
+      while (it.hasNext()) {
+        if (! contains(it.next())) {
+          return false;
+        }
+      }
+      
+      return true;
+    }
+
     public boolean add(V value) {
       throw new UnsupportedOperationException();
     }
@@ -189,6 +204,10 @@ public class TreeMap<K,V> implements Map<K,V> {
       throw new UnsupportedOperationException();
     }
 
+    public boolean removeAll(Collection<?> c) {
+      throw new UnsupportedOperationException();
+    }
+
     public Object[] toArray() {
       return toArray(new Object[size()]);      
     }