--- old/src/java.base/share/classes/java/lang/CharacterData.java	2018-11-21 09:45:22.857151444 -0600
+++ new/src/java.base/share/classes/java/lang/CharacterData.java	2018-11-21 09:45:22.267170973 -0600
@@ -28,6 +28,9 @@
 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);