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Asked: May 10, 20262026-05-10T16:29:16+00:00 2026-05-10T16:29:16+00:00

What characters are valid in a Java class name? What other rules govern Java

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What characters are valid in a Java class name? What other rules govern Java class names (for instance, Java class names cannot begin with a number)?

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  1. 2026-05-10T16:29:16+00:00Added an answer on May 10, 2026 at 4:29 pm

    You can have almost any character, including most Unicode characters! The exact definition is in the Java Language Specification under section 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. …

    Letters and digits may be drawn from the entire Unicode character set, … This allows programmers to use identifiers in their programs that are written in their native languages.

    An identifier cannot have the same spelling (Unicode character sequence) as a keyword (§3.9), boolean literal (§3.10.3), or the null literal (§3.10.7), or a compile-time error occurs.

    However, see this question for whether or not you should do that.

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