Java tutorial
import java.util.ArrayList; import java.util.Collections; import java.util.List; public class Main { public static void main(String args[]) throws Exception { List<String> list = new ArrayList<String>(); list.add("A"); list.add("B"); list.add("C"); list = Collections.unmodifiableList(list); list.add(1, "G"); System.out.println(list); } }