一个怪现象，大家来看看~
在编写关于“Response”的代码时，遇到这样的怪事。

直接通过Tomcat运行范例程序时，报错：
HTTP   Status   500   -  

--------------------------------------------

type   Exception   report

message  

description   The   server   encountered   an   internal   error   ()   that   prevented   it   from   fulfilling   this   request.

exception  

org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:372)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


root   cause  

java.lang.NullPointerException
java.util.Arrays$ArrayList. <init> (Unknown   Source)
java.util.Arrays.asList(Unknown   Source)
org.apache.jsp.ch4.resposne_jsp._jspService(resposne_jsp.java:50)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)


note   The   full   stack   trace   of   the   root   cause   is   available   in   the   Apache   Tomcat/5.0.28   logs.

可是在运行过之前写的一个“Request.jsp”以后再运行就完全没有问题了。
但是在“Firefox”中无论如何运行都报错。
而且在NetBeans5.5中这个jsp根本无法通过编译。可是这是范例程序啊，为什么呢？似乎运行时出的问题和在NetBeans中出的问题原因是不一样的。NetBeans中编译时显示：
init:
deps-module-jar:
deps-ear-jar:
deps-jar:
library-inclusion-in-archive:
library-inclusion-in-manifest:
compile:
compile-jsps:
Compiling   1   source   file   to   C:\Documents   and   Settings\Java\Response\build\generated\classes
C:\Documents   and   Settings\Java\Response\build\generated\src\org\apache\jsp\response_jsp.java:65:   警告：编码   GBK   的不可映射字符
      out.println( "涓婁竴娆¤闂殑鏃堕棿锛?+cookie_response.getValue());
                                                          ^
C:\Documents   and   Settings\Java\Response\build\generated\src\org\apache\jsp\response_jsp.java:65:   未结束的字符串字面值
      out.println( "涓婁竴娆¤闂殑鏃堕棿锛?+cookie_response.getValue());
                              ^
C:\Documents   and   Settings\Java\Response\build\generated\src\org\apache\jsp\response_jsp.java:66:   需要   ') '
      cookie_response.setValue(new   Date().toString());
                                                                                &nb