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

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@@ -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);