JAVA對寫文件推薦用流的方式，下面是我寫的一個簡單計數器，當然在執行此程序前需要先建立count.txt文件，你可以僅執行此程序的后半部分，先創建文件：
$#@60;%@ page language = "java" %$#@62;
$#@60;%@ page contentType = "text/html; charSet=gb2312" %$#@62;
$#@60;%@ page import ="java.util.*" %$#@62;
$#@60;%@ page import ="java.lang.*" %$#@62;
$#@60;%@ page import ="javax.servlet.*" %$#@62;
$#@60;%@ page import ="javax.servlet.jsp.*" %$#@62;
$#@60;%@ page import ="javax.servlet.http.*" %$#@62;
$#@60;%@ page import="java.io.*" %$#@62;

$#@60;%
int count=0;
FileInputStream fi =new FileInputStream ("count.txt");
ObjectInputStream si= new ObjectInputStream (fi);
count =si.readInt();
count++;
out.print(count);
si.close();

FileOutputStream fo =new FileOutputStream ("count.txt");
ObjectOutputStream so= new ObjectOutputStream (fo);
so.writeInt(count);
so.close();
%$#@62;
你可以發現count.txt在winnt/system32目錄下(WinNt4)這個計數器使用Int型變量，簡單好用.希望大家對JAVA多多討論。