test15.java~

来自「SCJP认证考试资料」· JAVA~ 代码 · 共 12 行

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");
    int pos = Collections.binarySearch(aList,"Russia");
    System.out.println(pos);
    }
}