How to ensure completeness in an enum switch at compile time?

Question

I have several switch statements which test an enum. All enum values must be handled in the switch statements by a case s

Answer 1

Probably a tool like FindBugs will mark such switches.

The hard answer would be to refactor:

Possibility 1: can go Object Oriented

If feasible, depends on the code in the cases.

Instead of

switch (language) {
case EO: ... break;
case IL: ... break;
}

create an abstract method:, say p

language.p();

or

switch (p.category()) {
case 1: // Less cases.
...
}

Possibility 2: higher level

When having many switches, in an enum like DocumentType, WORD, EXCEL, PDF, ... . Then create a WordDoc, ExcelDoc, PdfDoc extending a base class Doc. And again one can work object oriented.