【无标题】用文件和ArrayList实现一个点名器

用文件和Arraylist实现一个点名器

package JB2015;


import java.io.BufferedReader;

import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Random;

public class RNG {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader=new BufferedReader(new FileReader("D:\untitled\src\JB2015\q2"));
        ArrayList arrayList=new ArrayList<>();
        String by;
        while((by= bufferedReader.readLine())!=null){
            arrayList.add(by);

        }
        bufferedReader.close();
        Random random=new Random();
        //用Random产生一个随机数 
        int a=random.nextInt(arrayList.size());
        
         String s= arrayList.get(a);
        System.out.println(s);
    }
}