Passing String to annotation in Java

Question

I come up with a idea that passing a String literal to annotation. Is it possible in Java 8/9? If not, in what circumstances could it be needed? How can it be applied otherwise?

For example:

final String test = "literal";

@Component(test)
// .
// .

Answer 1

It has to be compile time constant. A public static final String will work, a merely final one won't (the enclosing scope/class means it's not compile time constant).

See also this Q/A: Compile time constants and variables