src/java.base/share/classes/java/lang/CharacterData.java

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@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2006, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2006, 2018, 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -26,10 +26,13 @@
 package java.lang;
 
 abstract class CharacterData {
     abstract int getProperties(int ch);
     abstract int getType(int ch);
+    abstract boolean isDigit(int ch);
+    abstract boolean isLowerCase(int ch);
+    abstract boolean isUpperCase(int ch);
     abstract boolean isWhitespace(int ch);
     abstract boolean isMirrored(int ch);
     abstract boolean isJavaIdentifierStart(int ch);
     abstract boolean isJavaIdentifierPart(int ch);
     abstract boolean isUnicodeIdentifierStart(int ch);