package com.xu.io;

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

import java.util.Arrays;

public class FileRead {

public static void main(String[] args) throws IOException {

//讀取記事本的內容存入一個字符串中

BufferedReader br = new BufferedReader(new FileReader("e:\\s.txt"));

String sg = br.readLine();

br.close();

//把讀取的字符串存入一個字符數組中

char[] ch = sg.toCharArray();

//調用sort方法對字符串進行排序

Arrays.sort(ch);

//排序后的字符數組轉換為字符串;

String sgAfter = new String(ch);

//把排序好的字符串寫入文件ss.txt

BufferedWriter bw ?= new BufferedWriter(new FileWriter("e:\\ss.txt"));

bw.write(sgAfter);

bw.newLine();

bw.flush();

//關閉寫入

bw.close();

}

}