--- a/jdk/src/macosx/classes/java/util/prefs/MacOSXPreferences.java	Tue May 15 16:46:10 2012 +0400
+++ b/jdk/src/macosx/classes/java/util/prefs/MacOSXPreferences.java	Tue May 15 11:51:51 2012 -0700
@@ -135,18 +135,21 @@
 
 
     // AbstractPreferences implementation
+    @Override
     protected void putSpi(String key, String value)
     {
         file.addKeyToNode(path, key, value);
     }
 
     // AbstractPreferences implementation
+    @Override
     protected String getSpi(String key)
     {
         return file.getKeyFromNode(path, key);
     }
 
     // AbstractPreferences implementation
+    @Override
     protected void removeSpi(String key)
     {
         Objects.requireNonNull(key, "Specified key cannot be null");
@@ -155,6 +158,7 @@
 
 
     // AbstractPreferences implementation
+    @Override
     protected void removeNodeSpi()
         throws BackingStoreException
     {
@@ -174,6 +178,7 @@
 
 
     // AbstractPreferences implementation
+    @Override
     protected String[] childrenNamesSpi()
         throws BackingStoreException
     {
@@ -183,6 +188,7 @@
     }
 
     // AbstractPreferences implementation
+    @Override
     protected String[] keysSpi()
         throws BackingStoreException
     {
@@ -192,6 +198,7 @@
     }
 
     // AbstractPreferences implementation
+    @Override
     protected AbstractPreferences childSpi(String name)
     {
         // Add to parent's child list here and disallow sync
@@ -203,6 +210,7 @@
     }
 
     // AbstractPreferences override
+    @Override
     public void flush()
         throws BackingStoreException
     {
@@ -217,6 +225,7 @@
     }
 
     // AbstractPreferences implementation
+    @Override
     protected void flushSpi()
         throws BackingStoreException
     {
@@ -224,6 +233,7 @@
     }
 
     // AbstractPreferences override
+    @Override
     public void sync()
         throws BackingStoreException
     {
@@ -244,6 +254,7 @@
     }
 
     // AbstractPreferences implementation
+    @Override
     protected void syncSpi()
         throws BackingStoreException
     {

--- a/jdk/src/macosx/classes/java/util/prefs/MacOSXPreferencesFactory.java	Tue May 15 16:46:10 2012 +0400
+++ b/jdk/src/macosx/classes/java/util/prefs/MacOSXPreferencesFactory.java	Tue May 15 11:51:51 2012 -0700
@@ -26,10 +26,12 @@
 package java.util.prefs;
 
 class MacOSXPreferencesFactory implements PreferencesFactory {
+    @Override
     public Preferences userRoot() {
         return MacOSXPreferences.getUserRoot();
     }
 
+    @Override
     public Preferences systemRoot() {
         return MacOSXPreferences.getSystemRoot();
     }

--- a/jdk/src/macosx/classes/java/util/prefs/MacOSXPreferencesFile.java	Tue May 15 16:46:10 2012 +0400
+++ b/jdk/src/macosx/classes/java/util/prefs/MacOSXPreferencesFile.java	Tue May 15 11:51:51 2012 -0700
@@ -101,9 +101,10 @@
     }
 
     // Maps string -> weak reference to MacOSXPreferencesFile
-    private static HashMap cachedFiles = null;
+    private static HashMap<String, WeakReference<MacOSXPreferencesFile>>
+            cachedFiles;
     // Files that may have unflushed changes
-    private static HashSet changedFiles = null;
+    private static HashSet<MacOSXPreferencesFile> changedFiles;
 
 
     // Timer and pending sync and flush tasks (which are both scheduled
@@ -136,13 +137,14 @@
     {
         MacOSXPreferencesFile result = null;
 
-        if (cachedFiles == null) cachedFiles = new HashMap();
+        if (cachedFiles == null)
+            cachedFiles = new HashMap<>();
 
         String hashkey =
             newName + String.valueOf(isUser);
-        WeakReference hashvalue = (WeakReference)cachedFiles.get(hashkey);
+        WeakReference<MacOSXPreferencesFile> hashvalue = cachedFiles.get(hashkey);
         if (hashvalue != null) {
-            result = (MacOSXPreferencesFile)hashvalue.get();
+            result = hashvalue.get();
         }
         if (result == null) {
             // Java user node == CF current user, any host
@@ -150,7 +152,7 @@
             result = new MacOSXPreferencesFile(newName,
                                          isUser ? cfCurrentUser : cfAnyUser,
                                          isUser ? cfAnyHost : cfCurrentHost);
-            cachedFiles.put(hashkey, new WeakReference(result));
+            cachedFiles.put(hashkey, new WeakReference<MacOSXPreferencesFile>(result));
         }
 
         // Don't schedule this file for flushing until some nodes or
@@ -171,10 +173,11 @@
         boolean ok = true;
 
         if (cachedFiles != null  &&  !cachedFiles.isEmpty()) {
-            Iterator iter = cachedFiles.values().iterator();
+            Iterator<WeakReference<MacOSXPreferencesFile>> iter =
+                    cachedFiles.values().iterator();
             while (iter.hasNext()) {
-                WeakReference ref = (WeakReference)iter.next();
-                MacOSXPreferencesFile f = (MacOSXPreferencesFile)ref.get();
+                WeakReference<MacOSXPreferencesFile> ref = iter.next();
+                MacOSXPreferencesFile f = ref.get();
                 if (f != null) {
                     if (!f.synchronize()) ok = false;
                 } else {
@@ -202,10 +205,11 @@
     static synchronized boolean syncUser() {
         boolean ok = true;
         if (cachedFiles != null  &&  !cachedFiles.isEmpty()) {
-            Iterator<WeakReference> iter = cachedFiles.values().iterator();
+            Iterator<WeakReference<MacOSXPreferencesFile>> iter =
+                    cachedFiles.values().iterator();
             while (iter.hasNext()) {
-                WeakReference ref = iter.next();
-                MacOSXPreferencesFile f = (MacOSXPreferencesFile)ref.get();
+                WeakReference<MacOSXPreferencesFile> ref = iter.next();
+                MacOSXPreferencesFile f = ref.get();
                 if (f != null && f.user == cfCurrentUser) {
                     if (!f.synchronize()) {
                         ok = false;
@@ -240,12 +244,10 @@
         boolean ok = true;
 
         if (changedFiles != null  &&  !changedFiles.isEmpty()) {
-            Iterator iter = changedFiles.iterator();
-            while (iter.hasNext()) {
-                MacOSXPreferencesFile f = (MacOSXPreferencesFile)iter.next();
-                if (!f.synchronize()) ok = false;
+            for (MacOSXPreferencesFile f : changedFiles) {
+                if (!f.synchronize())
+                    ok = false;
             }
-
             changedFiles.clear();
         }
 
@@ -263,7 +265,8 @@
     private void markChanged()
     {
         // Add this file to the changed file list
-        if (changedFiles == null) changedFiles = new HashSet();
+        if (changedFiles == null)
+            changedFiles = new HashSet<>();
         changedFiles.add(this);
 
         // Schedule a new flush and a shutdown hook, if necessary
@@ -309,7 +312,9 @@
 
             if (syncInterval > 0) {
                 timer().schedule(new TimerTask() {
-                        public void run() { MacOSXPreferencesFile.syncWorld();}
+                    @Override
+                    public void run() {
+                        MacOSXPreferencesFile.syncWorld();}
                     }, syncInterval * 1000, syncInterval * 1000);
             } else {
                 // syncInterval property not set. No sync timer ever.
@@ -323,6 +328,7 @@
         if (timer == null) {
             timer = new Timer(true); // daemon
             Thread flushThread = new Thread() {
+                @Override
                 public void run() {
                     flushWorld();
                 }