import java.util.Arrays; import java.util.Collections; import java.util.LinkedList; import java.util.List; public class Main { public static void main(String[] argv) { List<String> sortedList = new LinkedList<String>(); sortedList.addAll(Arrays.asList(new String[] { "a", "b", "c", "d" })); int index = Collections.binarySearch(sortedList, "c"); System.out.println(index); index = Collections.binarySearch(sortedList, "e"); System.out.println(index); } }