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

*** 1,7 ****
  /*
!  * Copyright (c) 2006, 2011, 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
--- 1,7 ----
  /*
!  * 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
*** 26,35 ****
--- 26,38 ----
  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);