src/java.desktop/share/classes/com/sun/imageio/plugins/png/PNGImageReader.java

@@ -196,10 +196,11 @@
 
     public PNGImageReader(ImageReaderSpi originatingProvider) {
         super(originatingProvider);
     }
 
+    @Override
     public void setInput(Object input,
                          boolean seekForwardOnly,
                          boolean ignoreMetadata) {
         super.setInput(input, seekForwardOnly, ignoreMetadata);
         this.stream = (ImageInputStream)input; // Always works

@@ -1518,10 +1519,11 @@
                 inf.end();
             }
         }
     }
 
+    @Override
     public int getNumImages(boolean allowSearch) throws IIOException {
         if (stream == null) {
             throw new IllegalStateException("No input source set!");
         }
         if (seekForwardOnly && allowSearch) {

@@ -1529,30 +1531,33 @@
                 ("seekForwardOnly and allowSearch can't both be true!");
         }
         return 1;
     }
 
+    @Override
     public int getWidth(int imageIndex) throws IIOException {
         if (imageIndex != 0) {
             throw new IndexOutOfBoundsException("imageIndex != 0!");
         }
 
         readHeader();
 
         return metadata.IHDR_width;
     }
 
+    @Override
     public int getHeight(int imageIndex) throws IIOException {
         if (imageIndex != 0) {
             throw new IndexOutOfBoundsException("imageIndex != 0!");
         }
 
         readHeader();
 
         return metadata.IHDR_height;
     }
 
+    @Override
     public Iterator<ImageTypeSpecifier> getImageTypes(int imageIndex)
       throws IIOException
     {
         if (imageIndex != 0) {
             throw new IndexOutOfBoundsException("imageIndex != 0!");

@@ -1783,10 +1788,11 @@
      * at the last position of this list.
      *
      * After this changes we should override getRawImageType()
      * to return last element of image types list.
      */
+    @Override
     public ImageTypeSpecifier getRawImageType(int imageIndex)
       throws IOException {
 
         Iterator<ImageTypeSpecifier> types = getImageTypes(imageIndex);
         ImageTypeSpecifier raw = null;

@@ -1794,27 +1800,31 @@
             raw = types.next();
         } while (types.hasNext());
         return raw;
     }
 
+    @Override
     public ImageReadParam getDefaultReadParam() {
         return new ImageReadParam();
     }
 
+    @Override
     public IIOMetadata getStreamMetadata()
         throws IIOException {
         return null;
     }
 
+    @Override
     public IIOMetadata getImageMetadata(int imageIndex) throws IIOException {
         if (imageIndex != 0) {
             throw new IndexOutOfBoundsException("imageIndex != 0!");
         }
         readMetadata();
         return metadata;
     }
 
+    @Override
     public BufferedImage read(int imageIndex, ImageReadParam param)
         throws IIOException {
         if (imageIndex != 0) {
             throw new IndexOutOfBoundsException("imageIndex != 0!");
         }

@@ -1830,10 +1840,11 @@
             throw new IIOException("Caught exception during read: ", e);
         }
         return theImage;
     }
 
+    @Override
     public void reset() {
         super.reset();
         resetStreamSettings();
     }