--- old/src/java.base/share/classes/java/lang/String.java	2016-02-19 14:35:05.871659369 +0300
+++ new/src/java.base/share/classes/java/lang/String.java	2016-02-19 14:35:05.799659719 +0300
@@ -42,6 +42,7 @@
 import java.util.stream.IntStream;
 import java.util.stream.StreamSupport;
 import jdk.internal.HotSpotIntrinsicCandidate;
+import jdk.internal.vm.annotation.Stable;
 
 /**
  * The {@code String} class represents character strings. All
@@ -119,7 +120,14 @@
 public final class String
     implements java.io.Serializable, Comparable<String>, CharSequence {
 
-    /** The value is used for character storage. */
+    /**
+     * The value is used for character storage.
+     *
+     * @implNote This field is marked with {@link Stable} to trust the contents
+     * of the array. No other facility in JDK provides this functionality (yet).
+     * {@link Stable} is safe here, because value is never null.
+     */
+    @Stable
     private final byte[] value;
 
     /**
@@ -129,6 +137,10 @@
      * LATIN1
      * UTF16
      *
+     * @implNote Note this field is not {@link Stable}, because we want
+     * LATIN1 (0) coder to fold too. {@link Stable} would not allow that,
+     * as it reserves the default value as "not initialized" value.
+     * Constant-folding this field is handled internally in VM.
      */
     private final byte coder;