3.8. Identifiers
An identifier is an unlimited-length sequence of Java letters and Java digits, the first of which must be a Java letter.
Identifier: IdentifierChars but not a Keyword or BooleanLiteral or NullLiteralIdentifierChars: JavaLetter IdentifierChars JavaLetterOrDigitJavaLetter: any Unicode character that is a Java letter (see below)JavaLetterOrDigit: any Unicode character that is a Java letter-or-digit (see below)
A “Java letter” is a character for which the method Character.isJavaIdentifierStart(int) returns true.
A “Java letter-or-digit” is a character for which the method Character.isJavaIdentifierPart(int) returns true.
The “Java letters” include uppercase and lowercase ASCII Latin letters A-Z (\u0041- \u005a), and ...
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