--- old/src/java.desktop/share/classes/java/awt/image/RGBImageFilter.java	2020-08-17 10:55:46.577576694 +0100
+++ new/src/java.desktop/share/classes/java/awt/image/RGBImageFilter.java	2020-08-17 10:55:46.421573339 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1995, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1995, 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
@@ -67,6 +67,11 @@
 public abstract class RGBImageFilter extends ImageFilter {
 
     /**
+     * Constructor for subclasses to call.
+     */
+    public RGBImageFilter() {}
+
+    /**
      * The {@code ColorModel} to be replaced by
      * {@code newmodel} when the user calls
      * {@link #substituteColorModel(ColorModel, ColorModel) substituteColorModel}.