Java tutorial
import java.text.DateFormatSymbols; import java.util.Collections; import java.util.LinkedList; import java.util.List; public class Main { public static void main(String[] args) { List<String> list = new LinkedList<String>(); list.add("a"); list.add("b"); list.add("c"); list.add("d"); list.add("e"); list.add("f"); Collections.sort(list); System.out.println(list); int index = Collections.binarySearch(list, "c"); if (index > 0) { System.out.println("Found at index = " + index); String month = (String) list.get(index); System.out.println(month); } } }