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Underscore in Java 9

From java 9 onwards single underscore cannot be used as identifier. Since Java 9, the underscore character is a reserved keyword and as of java 9 it is reserved for future use and has no defined usage. It is just reserved keyword for future use. So from java 9 we find 3 reserved keywords:

const	Reserved for future use
goto	Reserved for future use
_	Reserved for future use

Keywords const and goto are reserved keyword since from the beginning. Underscore is added in java 9.

Underscore is keyword only when used alone. But can be used with other character in identifiers.

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Underscore in Java 9

const

goto

_

Underscore is keyword only when used alone. But can be used with other character in identifiers.