Since a Java source file must contain a package declaration as the first token other than comments and whitespace, it should not be difficult to make the package name scanning more robust than it is
--i.e. actually build a simple but correct tokenizer which only recognizes whitespace, comment delimiters, `package`, and package names; when it encountered anything other than these (e.g. import, cla
ss decl), abort at once. Currently it might be confused about a package decl occurring within a comment block or something, In practice this is likely to be pretty rare.