copyfile.java

这是有关电子商务的学习笔记以及java的源代码,非常精彩

import java.io.*;
public class copyfile
  {
  public static void main(String args[]) throws Exception
    {
    BufferedReader br=new BufferedReader(new FileReader("wfile.txt"));
    BufferedWriter bw=new BufferedWriter(new FileWriter("linenum.txt"));
    String s,space="    ";
    int num=0;
    while (br.ready())
      {
      s=br.readLine();
      num++;
      bw.write(String.valueOf(num));
      bw.write(space);
      bw.write(s);
      bw.newLine();
      }
    bw.close();
    }
  }