随笔档案(496)

import java.io.*;

public class FileInputDemo
{
public static void main(String[] args)
{
   try
   {
    FileInputStream f = new FileInputStream("mydata.txt");
    DataInputStream in = new DataInputStream(f);
    //BufferedReader br = new BufferedReader(new InputStreamReader(f));
    while(in.available() != 0)
     System.out.println(in.readLine());
     /**
      * DataInputStream.readLine()已经过时
      * 使用 DataInputStream 类读取文本行的程序可以改为使用BufferedReader类
      * 改用BufferedReader.readLine()方法
      * 只要将以下形式的代码：DataInputStream d = new DataInputStream(in);
      * 替换为：BufferedReader d = new BufferedReader(new InputStreamReader(in));
      */
    in.close();
   }
   catch(Exception e)
   {
    System.err.println("File input error!");
   }
}
}