[求助]NullPointerException 用struts做程序时总回遇见NullPointerException一般NullPointerException有几种情况解决方法是什么 color='#FF8000'>----------------解决方案-------------------------------------------...

求助各位，一个NullPointerException.html'>java.lang.NullPointerException的错误！教程上的一个代码，rs.next()报java.lang.NullPointerException.html'>NullPointerException，DB是封装的类，我写程序测试了一下DB类和Article也能取到数，但是运行网页就报错，是不是递归写的有问题，...

NullPointerException错误 importjava.awt.*;importjava.awt.event.*;importjava.util.*; classWindowTextAreaextendsFrameimplementsTextListener{TextAreatext1,text2;WindowTextArea(){setLayout(ne...

关于java.io.Reader的NullPointerException.html'>NullPointerException，请高手打救。今天在多并发测试自己代码的时候，发现后台时不时会报错：NullPointerException.html'>java.lang.NullPointerException atjava.io.Reader.<init>(Reader.java:61...

为什么这个地方会出现NullPointerException.html'>java.lang.NullPointerException异常importjavax.annotation.Resource;importorg.springframework.stereotype.Controller;importcom.opensymphony.xwork2.ActionContext;importt...

weblogic启动失败（NullPointerException） 现象：（weblogicversion10.3.2） 在停止weblogic的时候，手动删掉放在autodeploy下面的war然后启动的时候出现 java.lang.NullPointerException???atweblogic.deploy.internal.adminserver.DeploymentManager.g...

NullPointerException的错误？？运行到paint.setColor(Color.BLUE);的时候报NullPointerException的错了！求解？publicclassMyViewextendsView{ Paintpaint; publicMyView(Contextcontext){ super(context); paint.setColor(Color.BL...

NullPointerException'>NullPointerException问题，在线等我有个query.jsp页面还有个OpenDB.java类，OpenDB.java代码如下：packagecom.netshop;importjava.sql.*;publicclassOpenDB{ StringuserName="root"; StringuserPassword...

求助！NullPointerException'>java.lang.NullPointerExceptionjava.lang.NullPointerException'>NullPointerException org.apache.struts2.impl.StrutsActionProxy.getErrorMessage(StrutsActionProxy.java:69) com.ope...

NullPointerException'>NullPointerException在做对两个参数的查询时,有时会出现以下错误:javax.servlet.ServletException:NullPointerException'>java.lang.NullPointerException org.apache.struts2.dispatcher.Dispatcher.serviceActi...

NullPointerException'>NullPointerException相关代码如下，运行时提示“allpersontable.setValueAt(allperson[count].getID(),count+1,count+0);”这行抛出了那个异常，我想了一下，应该是allperson这个对象数组的问题，可是我明明已经对它进行复制了啊，为什么还会出现那个异常呢？请指教。不胜感激：...

NullPointerException'>NullPointerException这是我的代码：request.setCharacterEncoding("gbk"); Connectionconn=null; PreparedStatementpstmt1=null; PreparedStatementpstmt2=null; conn=newconnDB().getConn(); ...

为什么会抛出NUllPointerException？本帖最后由wjpxz于2013-01-2410:44:05编辑异常发生在62行，这是异常代码：Exceptioninthread"main"NullPointerException'>java.lang.NullPointerException atjava.io.Writer.write(UnknownSource) attest.util....

NullPointerException的异常问题 importjava.util.*;importjava.awt.*;importjava.awt.event.*; publicclassStepOneextendsFrameimplementsActionListener{privateButtonenter,quit;TextFieldwei,nwei;pub...

nullpointerexception问题求助！！！ importjava.io.*; publicclassFileOperation{ publicstaticvoidmain(Stringargs[]){ BufferedReaderbr=newBufferedReader(newInputStreamReader(System.in)); Filemyfile...

关于swfupload插件上传报WARNRequestProcessor:509-UnhandledExceptionthrown:classja关于swfupload插件上传报WARNRequestProcessor:509-UnhandledExceptionthrown:classNullPointerException.html'>java.lang.NullPointerExceptio...

关于swfupload插件上传报WARNRequestProcessor:509-UnhandledExceptionthrown:classja关于swfupload插件上传报WARNRequestProcessor:509-UnhandledExceptionthrown:classNullPointerException.html'>java.lang.NullPointerExceptio...

NullPointerException'>NullPointerException该怎么解决<%@pagelanguage="java"%><%@pagesession="true"%><%@pagecontentType="text/html;charser=gb2312"%><%@pagei...

请教为什么会报NullPointerException'>NullPointerExceptionimportjava.io.Console;publicclassNewConsole{ publicstaticvoidmain(String[]args){ Consolec=System.console(); char[]pw=newchar[10]; pw=c.readPassword(...

使用jsmart时报NullPointerException'>NullPointerException异常？？在使用jsmart时，对SmartUpload初始化时报空指针异常：upload.initialize(config,request,response);或者这个upload.initialize(pageContext);都会报空指针异常？？为什么？？怎么解决。。。。。color='#...