package 文件读取;
import java.io.*;
import java.util.*;
class File
{
public static void main(String[] args)
{
BufferedReader br = null;
BufferedWriter bw = null;
try
{
//创建读取流
br = new BufferedReader(new FileReader("C:\a.txt"));
//创建写入流
bw = new BufferedWriter(new FileWriter("C:\b.txt"));
//读取a.txt中的字符串内容
String s = br.readLine();
//将字符串转变成字符串数组
char[] a = s.toCharArray();
//对数组中的元素按按自然顺序排序
Arrays.sort(a);
//将数组中写入到输出流
bw.write(a, 0, a.length);
bw.flush();
}
//异常处理
catch(IOException e)
{
throw new RuntimeException("读写失败");
}
finally
{
//关闭读取流
if(br!=null)
{
try
{
br.close();
}
catch(IOException e)
{
throw new RuntimeException("读取关闭失败");
}
}
//关闭写入流
if(bw!=null)
{
try
{
bw.close();
}
catch(IOException e)
{
throw new RuntimeException("写入关闭失败");
}
}
}
}
}