JDK 9 RFR of JDK-8039861: Fix fallthrough lint warnings in awt

[Joe Darcy]

Hello,

Please review the changes for
    JDK-8039861: Fix fallthrough lint warnings in awt
    http://cr.openjdk.java.net/~darcy/8039861.0/

Thanks,

-Joe

--- old/src/share/classes/java/awt/dnd/DragSourceContext.java 2014-04-09 
19:41:33.000000000 -0700
+++ new/src/share/classes/java/awt/dnd/DragSourceContext.java 2014-04-09 
19:41:33.000000000 -0700
@@ -472,7 +472,7 @@
      *               <code>ENTER</code>, <code>OVER</code>,
      *               <code>CHANGED</code>
      */
-
+    @SuppressWarnings("fallthrough")
     protected synchronized void updateCurrentCursor(int sourceAct, int 
targetAct, int status) {

         // if the cursor has been previously set then don't do any 
defaults
--- old/src/share/classes/sun/awt/image/GifImageDecoder.java 2014-04-09 
19:41:33.000000000 -0700
+++ new/src/share/classes/sun/awt/image/GifImageDecoder.java 2014-04-09 
19:41:33.000000000 -0700
@@ -114,6 +114,7 @@
     /**
      * produce an image from the stream.
      */
+    @SuppressWarnings("fallthrough")
     public void produceImage() throws IOException, ImageFormatException {
         try {
             readHeader();
@@ -238,7 +239,7 @@
                     if (frameno == 0) {
                         return;
                     }
-                    // NOBREAK
+                    // Fall through

                   case TERMINATOR:
                     if (nloops == 0 || nloops-- >= 0) {
--- old/src/share/classes/sun/awt/image/PixelConverter.java 2014-04-09 
19:41:34.000000000 -0700
+++ new/src/share/classes/sun/awt/image/PixelConverter.java 2014-04-09 
19:41:33.000000000 -0700
@@ -53,6 +53,7 @@

     protected PixelConverter() {}

+    @SuppressWarnings("fallthrough")
     public int rgbToPixel(int rgb, ColorModel cm) {
         Object obj = cm.getDataElements(rgb, null);
         switch (cm.getTransferType()) {
--- old/src/solaris/classes/sun/awt/X11/XWM.java    2014-04-09 
19:41:34.000000000 -0700
+++ new/src/solaris/classes/sun/awt/X11/XWM.java    2014-04-09 
19:41:34.000000000 -0700
@@ -1112,6 +1112,7 @@
      * Therefore, a compound state is just ICONIFIED | anything else.
      *
      */
+    @SuppressWarnings("fallthrough")
     boolean supportsExtendedState(int state) {
         switch (state) {
           case Frame.MAXIMIZED_VERT:
@@ -1131,6 +1132,7 @@
                       return true;
                   }
               }
+              /* FALLTROUGH */
           default:
               return false;
         }