Java tutorial
import java.util.Collections; import java.util.Date; import java.util.List; import java.util.Map; import java.util.Set; public class Main { public static void main(String args[]) { List list = Collections.EMPTY_LIST; Set set = Collections.EMPTY_SET; Map map = Collections.EMPTY_MAP; List<String> s = Collections.emptyList(); Set<Long> l = Collections.emptySet(); Map<Date, String> d = Collections.emptyMap(); } }