java从入门到精髓 - IO输入输出FileInputOutputStream

import java.io.*;
public class FileInputOutputStream {
 public static void main(String[] args) {
  File file = new File("E:/workspace/Java从入门到精通/mynote.txt");
  try
  {
   FileOutputStream out = new FileOutputStream(file);
   byte b[]= "我有一只小毛驴。".getBytes();
   //byte b[]= str.getBytes();
   System.out.println("b.length: "+b.length);
   out.write(b);
   out.close();
   
  }catch(Exception e)
  {
   e.printStackTrace();
  }
  try
  {
   FileInputStream in = new FileInputStream(file);
   byte b [] = new byte[1024];
   int len = in.read(b);
   System.out.println("文件中的信息："+new String(b,0,len));
   in.close();
   
  }
  catch(Exception e)
  {
   e.printStackTrace();
  }
 }

}