package cn.itcast_02;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Random;
/*
*需求: 我有一个文本文文件中存储了几个名称,请大家写一个程序实现随机获取一个名字
*
* 分析:
* A:把文本文件中的数据存储到集合中
* B:随机产生一个索引
* C:根据该索引获取一个值
*
*/
public class 随机获取文本文件中的名字 {
public static void main(String[] args) throws IOException {
// 把文本文文件中的名字添加到集合中
BufferedReader br = new BufferedReader(new FileReader("a.txt"));
ArrayList<String> array = new ArrayList<String>();
String line = null;
while((line = br.readLine()) != null) {
array.add(line);
}
br.close();
//随机产生索引
Random r = new Random();
int index = r.nextInt(array.size());
//输出
String name = array.get(index);
System.out.println(name);
}
}
Requirements: I have several names stored in a text file. Please write a program to obtain a random name in java.
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Origin blog.csdn.net/kaszxc/article/details/108653291
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