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Asked: 2026-06-11T14:25:26+00:00

This answer to another questions suggests, as a workaround for finding anonymous classes via

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This answer to another questions suggests, as a workaround for finding anonymous classes via reflection, to simply try all names, starting with ...$1 and counting up until no more can be found. Is this guaranteed to find all inner classes, or could there be cases where they start at 0 or some numbers are left out (for whatever reason)?

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  1. Editorial Team

    The JLS 13.1 specifies:

    The class or interface must be named by its binary name, which must meet the following constraints:

    • The binary name of a top level type (§7.6) is its canonical name (§6.7).
    • […]
    • The binary name of an anonymous class (§15.9.5) consists of the binary name of its immediately enclosing type, followed by $, followed by a non-empty sequence of digits.

    So in theory, it does not have to start at 1, but it has to be something like EnclosingClass$N where N is a number.

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