package javax.annotation; import java.lang.annotation.Documented; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import javax.annotation.meta.TypeQualifierNickname; import javax.annotation.meta.When; /** Used to annotate a value of unknown sign */ @Documented @TypeQualifierNickname @Nonnegative(when = When.UNKNOWN) @Retention(RetentionPolicy.RUNTIME) public @interface Signed { }