Java数据输出到指定文件

参考这程序吧
/*
 * c7:IODemo4.Java 1.0 05/02/10
 * author:Leo
 * This program is protected by copyright laws.
 * Reader from and write to files.
 * 字符流和字节流类似,但效率更高.有可能的情况下,尽量使用reader和writer
 * 一般只要把Reader替换为InputStream,用Writer 替换OutputStream,当然还要用Char替换Byte.
 * 用reader和writer可以一次读一行,而且没有类型转换的麻烦 .     
 */

package myprojects.readerwriter;

import java.io.*;

class IODemo4
{
 public static void main(String args[])
 {
  System.out.println(“Starting reader...“);
  String s = new String();
  String s2=new String();
  try
  {
   BufferedReader in = new BufferedReader(new FileReader(“d:\\classtry\\My.class“));
   PrintWriter out = new PrintWriter(new FileWriter(“d:\\classtry\\destnation.xls“));
   //BufferedReader in2 = new BufferedReader(new FileReader(“d:\\javatry\\classtry\\destnation.xls“));
  
  
  
   //把下面的字符串写入到文件的第一行.
  
  
   //out.println(“the following is from source“);
   //下面的循环语句读入一行内容的同时进行写入.
   while((s=in.readLine()) != null)
   {
    System.out.println(s);
    //char ss[]=s.toCharArray();
    out.println(s+“\t“);
   }
   //in2.close();
   in.close();
   out.close();//关闭文件.
  
  }
  catch(Exception e)
  {
   e.printStackTrace();
  }
 }
}