--- old/src/java.desktop/share/classes/com/sun/imageio/plugins/png/PNGImageReader.java	2020-07-30 10:24:36.468861000 +0530
+++ new/src/java.desktop/share/classes/com/sun/imageio/plugins/png/PNGImageReader.java	2020-07-30 10:24:35.119467000 +0530
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -198,6 +198,7 @@
         super(originatingProvider);
     }
 
+    @Override
     public void setInput(Object input,
                          boolean seekForwardOnly,
                          boolean ignoreMetadata) {
@@ -1520,6 +1521,7 @@
         }
     }
 
+    @Override
     public int getNumImages(boolean allowSearch) throws IIOException {
         if (stream == null) {
             throw new IllegalStateException("No input source set!");
@@ -1531,6 +1533,7 @@
         return 1;
     }
 
+    @Override
     public int getWidth(int imageIndex) throws IIOException {
         if (imageIndex != 0) {
             throw new IndexOutOfBoundsException("imageIndex != 0!");
@@ -1541,6 +1544,7 @@
         return metadata.IHDR_width;
     }
 
+    @Override
     public int getHeight(int imageIndex) throws IIOException {
         if (imageIndex != 0) {
             throw new IndexOutOfBoundsException("imageIndex != 0!");
@@ -1551,6 +1555,7 @@
         return metadata.IHDR_height;
     }
 
+    @Override
     public Iterator<ImageTypeSpecifier> getImageTypes(int imageIndex)
       throws IIOException
     {
@@ -1785,6 +1790,7 @@
      * After this changes we should override getRawImageType()
      * to return last element of image types list.
      */
+    @Override
     public ImageTypeSpecifier getRawImageType(int imageIndex)
       throws IOException {
 
@@ -1796,15 +1802,18 @@
         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!");
@@ -1813,6 +1822,7 @@
         return metadata;
     }
 
+    @Override
     public BufferedImage read(int imageIndex, ImageReadParam param)
         throws IIOException {
         if (imageIndex != 0) {
@@ -1832,6 +1842,7 @@
         return theImage;
     }
 
+    @Override
     public void reset() {
         super.reset();
         resetStreamSettings();