输入输出流 综合应用实例 可是自学者更轻松的理解 输入输出流的知识

				import java.io.*;
				public class Example
				{  
				   public static void main(String args[ ])
				   { 
				      File file=new File("hello.txt");
				      byte b[]="欢迎welcome".getBytes();
				      try{
				           FileOutputStream  out=new  FileOutputStream(file);
				           out.write(b);
				           out.close();
				           FileInputStream  in=new FileInputStream(file);
				           int n=0;
				           while((n=in.read(b,0,2))!=-1)
				           {
				               String str=new String(b,0,2);
				               System.out.println(str);
				           }
				         }
				      catch(IOException e)
				         {
				           System.out.println(e);
				         }  
				   }
				}