莫名其妙空指针Javacode1423'>Exceptioninthread"Timer-21"java.lang.NullPointerExceptionatcom.daily.report.tools.Log.logInfo(Log.java:14)atcom.daily.report.tools.DailyTask.run(DailyTask.java:19)atjava...

hibernateannotation错误，找了好久都没找到解决办法啊log4j:WARNNoappenderscouldbefoundforlogger(org.hibernate.cfg.annotations.Version).log4j:WARNPleaseinitializethelog4jsystemproperly.log4j:WARNSeehttp://logging.apache...

java.lang.NoClassDefFoundError:Sun求解答.在线等java.lang.NoClassDefFoundError:SunCausedby:java.lang.ClassNotFoundException:Sun atjava.net.URLClassLoader$1.run(URLClassLoader.java:200) atjava.security.Access...

java.lang.UnsatisfiedLinkError这个错误怎么解决运行java程序，出现以下错误，求解决方法，谢谢1423'>Exceptioninthread"main"java.lang.UnsatisfiedLinkError:C:\ProgramFiles\MATLAB\R2009a\bin\win32\nativemcl.dll:找不到指定的程序。 atja...

hibernate中报错Unknownentity:org.hibernate.impl.QueryImpl1423'>Exceptioninthread"main"org.hibernate.MappingException:Unknownentity:org.hibernate.impl.QueryImpl atorg.hibernate.impl.SessionFacto...

请教：用Eclipse导出jar文件双击后无法运行双击后显示couldfindthemainclass用命令窗口运行显示D:\ProgramFiles\Javawork\TankWar1.9.10>java-jarNetTankWar_TankServer.jar1423'>Exceptioninthread"main"java.lang.UnsupportedClass...

hibernate方言设置问题使用hibernate操作数据库出现以下错误，怀疑方言没有设置，请问连接oracle应该真设置！log4j:WARNNoappenderscouldbefoundforlogger(org.hibernate.cfg.Environment).log4j:WARNPleaseinitializethelog4jsystemproperly.log4j:WARNSeeh...

求帮看看linux执行javaclass发生异常[root@cs1/]#javacom.magc.jni.HelloWorld1423'>Exceptioninthread"main"java.lang.UnsatisfiedLinkError:/home/cstor/libhello.so:/home/cstor/libhello.so:wrongELFclass:ELFCL...

求教下JSON的时间的问题JavacodepublicstaticObjectgetObject4JsonString(StringjsonString,ClasspojoCalss){Objectpojo;JSONObjectjsonObject=JSONObject.fromObject(jsonString);pojo=JSONObject.toBean(jsonObject,pojoCal...

hibernateannotation问题我原先加的是这三个包[b]"hibernate-annotations.jar，hibernate-commons-annotations.jar，ejb3-persistence.jar"(hibernate-ejb3-persistence.jar我也试过)，现在换成了"hibernate-annotations.jar，...

各位给帮满看一下为啥会报错难道是我写错了还是怎么的importjava.util.*;importjava.io.*;packageexample;publicclassHelloWorld{publicstaticvoidmain(String[]args){PrintWriterout=newPrintWriter("D:\\htdocs\\myfile.txt");Sys...

javaee问题多多，愁一天了！弄来一个web项目，刚修改就发现太多问题，1，在Action里面不能运行main方法，运行就报错：java.lang.NoSuchMethodError:main1423'>Exceptioninthread"main",2.在Action里面使用addActionError("请输入姓名");就报错：java.lang.Ru...

eclipse启动项目过一下就会出错抛异常应该不是程序的问题是我tomcat没有配置好吗？1423'>Exceptioninthread"http-bio-8088-exec-1"java.lang.OutOfMemoryError:PermGenspaceExceptioninthread"http-bio-8088-exec-10"java.lang.O...

为了实现rmi，修改java.rmi.server.codebase出错为了实现rmi分布式系统，需要修改codebase为我的服务器地址，现我尝试将codebase的地址改为我电脑上apache服务器的根目录，但是老是出错，实在不知道为什么我的电脑系统是win7下面是错误代码：C:\ProgramFiles(x86)\ApacheSoftwareFoundation\Apache2.2\htdo...

1423'>Exceptioninthread"Timer-0"怎么解决啊Exceptioninthread"Timer-0"java.lang.UnsupportedOperationException:Notsupportedyet. atnepu.quan.Synchronous_Datetime.run(Synchronous_Datetime.java:38) atj...

帮忙看个错误，什么意思java.lang.NoClassDefFoundError:antlr/ANTLRException atinfo.monitorenter.cpdetector.io.HTMLCodepageDetector.<init>(HTMLCodepageDetector.java:91) atWebEncoding.<clinit>(WebEncodin...

关于java反射的invoke方法报错JavacodepublicvoidinvokeMethod(Objectowner)throwsException{Classobj=owner.getClass();Method[]me=obj.getDeclaredMethods();for(Methodobject:me){object.setAccessible(true);Class[]param...

线程问题，运行时候泡这个异常！1423'>Exceptioninthread"AWT-EventQueue-0"java.lang.IllegalThreadStateException atjava.lang.Thread.start(UnknownSource) atPlayUI.LyricsDisplay(PlayUI.java:509) atPlayUI.playSon...

这个网上下载的答案，编译后运行时却.....//operators/MinMax.java//TIJ4ChapterOperators,Exercise9,page111//Displaythelargestandsmallestnumbersforbothfloatanddouble//exponentialnotation.publicclassMinMax{ publicstaticvoid...

JDBC2.0的批处理删除数据问题importjava.sql.Connection;importjava.sql.DriverManager;importjava.sql.PreparedStatement;publicclassExecuteBathDemo01{ /** *@paramargs */ publicstaticfinalStringDBDRIVER="org.gjt....