diff -r f13f9b941bc7 -r e3dcdd73a549 src/java.base/share/classes/java/util/ArrayList.java
--- a/src/java.base/share/classes/java/util/ArrayList.java	Tue Jan 30 10:42:13 2018 -0800
+++ b/src/java.base/share/classes/java/util/ArrayList.java	Tue Jan 30 11:08:50 2018 -0800
@@ -1143,6 +1143,23 @@
             return modified;
         }
 
+        public Object[] toArray() {
+            checkForComodification();
+            return Arrays.copyOfRange(root.elementData, offset, offset + size);
+        }
+
+        @SuppressWarnings("unchecked")
+        public <T> T[] toArray(T[] a) {
+            checkForComodification();
+            if (a.length < size)
+                return (T[]) Arrays.copyOfRange(
+                        root.elementData, offset, offset + size, a.getClass());
+            System.arraycopy(root.elementData, offset, a, 0, size);
+            if (a.length > size)
+                a[size] = null;
+            return a;
+        }
+
         public Iterator<E> iterator() {
             return listIterator();
         }