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  • Syntax

Identifiers

Java identifiers [JLS14:3.8].

Java identifiers are sequences of characters that, among other things, must differ from Java keywords. Since, as discussed in the topic on keywords, there are non-restricted and restricted Java keywords, correspondingly there are two kinds of Java identifiers. One kind excludes only non-restricted keywords: these identifiers are usable in most contexts. The other kind excludes restricted keywords as well (with a slight exception; see midentifier): these identifiers are usable in certain module-related contexts.

Here we also formalize Java type identifiers [JLS14:3.8], which are slightly more restricted identifiers.

Subtopics

Midentifier
Fixtype of Java identifiers, for module-related contexts.
Ascii-identifier-part-p
Check if an ASCII character can be non-starting part of identifiers.
Identifier
Fixtype of Java identifiers, for most contexts.
Tidentifier
Fixtype of Java type identifiers.
Umidentifier
Fixtype of Java unqualified method identifiers.
Ascii-identifier-ignore-p
Check if an ASCII character is ignorable in identifiers.
Ascii-identifier-start-p
Check if an ASCII character can start identifiers.
Nonascii-identifier-part-p
Check if a non-ASCII Java Unicode character can be non-starting part of identifiers.
Nonascii-identifier-ignore-p
Check if a non-ASCII Java Unicode character is ignorable in identifiers.
Nonascii-identifier-start-p
Check if a non-ASCII Java Unicode character can start identifiers.
Identifier-part-listp
Check if a list of Java Unicode characters consists of only characters that can be non-starting parts of identifiers.
Identifier-start-p
Check if a Java Unicode character can start identifiers.
Identifier-part-p
Check if a Java Unicode character can be non-starting part of identifiers.
Identifier-ignore-p
Check if a Java Unicode character is ignorable in identifiers.
No-identifier-ignore-p
Check if a list of Java Unicode characters does not include any character that is ignorable in identifiers.
Tidentifierp
Recognizer for tidentifier.
Identifierp
Recognizer for identifier.
Umidentifier-fix
Fixer for umidentifierp.
Tidentifier-fix
Fixer for tidentifierp.
Midentifier-fix
Fixer for midentifierp.
Identifier-fix
Fixer for identifierp.
Umidentifierp
Recognizer for umidentifier.
Midentifierp
Recognizer for midentifier.
Identifier-list
Fixtype of lists of Java identifiers, for most contexts.