--- old/src/java.desktop/share/classes/com/sun/imageio/plugins/gif/GIFImageWriter.java	2020-07-24 13:47:19.004199300 +0530
+++ new/src/java.desktop/share/classes/com/sun/imageio/plugins/gif/GIFImageWriter.java	2020-07-24 13:47:17.997005000 +0530
@@ -267,6 +267,7 @@
         }
     }
 
+    @Override
     public boolean canWriteSequence() {
         return true;
     }
@@ -317,6 +318,7 @@
      * Creates a default stream metadata object and merges in the
      * supplied metadata.
      */
+    @Override
     public IIOMetadata convertStreamMetadata(IIOMetadata inData,
                                              ImageWriteParam param) {
         if (inData == null) {
@@ -334,6 +336,7 @@
      * Creates a default image metadata object and merges in the
      * supplied metadata.
      */
+    @Override
     public IIOMetadata convertImageMetadata(IIOMetadata inData,
                                             ImageTypeSpecifier imageType,
                                             ImageWriteParam param) {
@@ -364,6 +367,7 @@
         return im;
     }
 
+    @Override
     public void endWriteSequence() throws IOException {
         if (stream == null) {
             throw new IllegalStateException("output == null!");
@@ -375,6 +379,7 @@
         resetLocal();
     }
 
+    @Override
     public IIOMetadata getDefaultImageMetadata(ImageTypeSpecifier imageType,
                                                ImageWriteParam param) {
         GIFWritableImageMetadata imageMetadata =
@@ -422,6 +427,7 @@
         return imageMetadata;
     }
 
+    @Override
     public IIOMetadata getDefaultStreamMetadata(ImageWriteParam param) {
         GIFWritableStreamMetadata streamMetadata =
             new GIFWritableStreamMetadata();
@@ -429,10 +435,12 @@
         return streamMetadata;
     }
 
+    @Override
     public ImageWriteParam getDefaultWriteParam() {
         return new GIFImageWriteParam(getLocale());
     }
 
+    @Override
     public void prepareWriteSequence(IIOMetadata streamMetadata)
       throws IOException {
 
@@ -455,6 +463,7 @@
         this.isWritingSequence = true;
     }
 
+    @Override
     public void reset() {
         super.reset();
         resetLocal();
@@ -470,6 +479,7 @@
         this.imageIndex = 0;
     }
 
+    @Override
     public void setOutput(Object output) {
         super.setOutput(output);
         if (output != null) {
@@ -484,6 +494,7 @@
         }
     }
 
+    @Override
     public void write(IIOMetadata sm,
                       IIOImage iioimage,
                       ImageWriteParam p) throws IOException {
@@ -511,6 +522,7 @@
         write(true, true, streamMetadata, iioimage, p);
     }
 
+    @Override
     public void writeToSequence(IIOImage image, ImageWriteParam param)
       throws IOException {
         if (stream == null) {
@@ -1319,6 +1331,7 @@
         this.compressionType = compressionTypes[0];
     }
 
+    @Override
     public void setCompressionMode(int mode) {
         if (mode == MODE_DISABLED) {
             throw new UnsupportedOperationException("MODE_DISABLED is not supported.");