Java tutorial
import java.util.ArrayList; import java.util.Collections; import java.util.List; public class Main { public static void main(String[] args) { List<String> list = new ArrayList<>(); list.add("Java"); list.add("R"); list.add("CSS"); list.add("XML"); Collections.sort(list); System.out.println("List: " + list); int index = Collections.binarySearch(list, "CSS"); System.out.println("CSS in List is at " + index); index = Collections.binarySearch(list, "Javascript"); System.out.println("Javascript in List is at " + index); } }