--- jsr166/src/main/java/util/ArrayDeque.java	2018/02/24 22:04:18	1.133
+++ jsr166/src/main/java/util/ArrayDeque.java	2019/08/30 18:05:38	1.138
@@ -8,8 +8,7 @@ package java.util;
 import java.io.Serializable;
 import java.util.function.Consumer;
 import java.util.function.Predicate;
-import java.util.function.UnaryOperator;
-import jdk.internal.misc.SharedSecrets;
+// OPENJDK import jdk.internal.access.SharedSecrets;
 
 /**
  * Resizable-array implementation of the {@link Deque} interface.  Array
@@ -51,7 +50,7 @@ import jdk.internal.misc.SharedSecrets;
  * Iterator} interfaces.
  *
  * <p>This class is a member of the
- * <a href="{@docRoot}/java/util/package-summary.html#CollectionsFramework">
+ * <a href="{@docRoot}/java.base/java/util/package-summary.html#CollectionsFramework">
  * Java Collections Framework</a>.
  *
  * @author  Josh Bloch and Doug Lea
@@ -181,7 +180,7 @@ public class ArrayDeque<E> extends Abstr
      * sufficient to hold 16 elements.
      */
     public ArrayDeque() {
-        elements = new Object[16];
+        elements = new Object[16 + 1];
     }
 
     /**
@@ -917,7 +916,7 @@ public class ArrayDeque<E> extends Abstr
      * @param operator the operator to apply to each element
      * @since TBD
      */
-    /* public */ void replaceAll(UnaryOperator<E> operator) {
+    /* public */ void replaceAll(java.util.function.UnaryOperator<E> operator) {
         Objects.requireNonNull(operator);
         final Object[] es = elements;
         for (int i = head, end = tail, to = (i <= end) ? end : es.length;
@@ -1199,6 +1198,7 @@ public class ArrayDeque<E> extends Abstr
         }
     }
 
+    // OPENJDK @java.io.Serial
     private static final long serialVersionUID = 2340985798034038923L;
 
     /**
@@ -1210,6 +1210,7 @@ public class ArrayDeque<E> extends Abstr
      * followed by all of its elements (each an object reference) in
      * first-to-last order.
      */
+    // OPENJDK @java.io.Serial
     private void writeObject(java.io.ObjectOutputStream s)
             throws java.io.IOException {
         s.defaultWriteObject();
@@ -1234,13 +1235,14 @@ public class ArrayDeque<E> extends Abstr
      *         could not be found
      * @throws java.io.IOException if an I/O error occurs
      */
+    // OPENJDK @java.io.Serial
     private void readObject(java.io.ObjectInputStream s)
             throws java.io.IOException, ClassNotFoundException {
         s.defaultReadObject();
 
         // Read in size and allocate array
         int size = s.readInt();
-        SharedSecrets.getJavaObjectInputStreamAccess().checkArray(s, Object[].class, size + 1);
+        jsr166.Platform.checkArray(s, Object[].class, size + 1);
         elements = new Object[size + 1];
         this.tail = size;