test15.java

SCJP认证考试资料

import java.util.*;
public class Test15 {
    public static void main(String[] args) {
    ArrayList<String> aList = new ArrayList<String>();
    aList.add("USA");
    aList.add("Russia");
    aList.add("UK");
    Collections.sort(aList);
    int pos = Collections.binarySearch(aList,"UK");
    System.out.println(pos);
    }
}