环境变量已经配置好了，但为什么eclipse中依然报java.lang.NoClassDefFoundError'>java.lang.NoClassDefFoundError?如题color='#e78608'>------解决方案--------------------这个异常一般来说跟你的环境变量陪没配好没有关系，而是没有发现你使用类定义。最好贴上代码来。

关于java的简单问题publicclasstest{publicstaticvoidmain(String[]args){Personye=newPerson();}}classPerson{intid;Personleft;Personright;}这段程序很怪，我用的jdk1.5在我笔记本上运行报错Exceptioninthread"main"java.lang.Inst...

调用JPanel.getGraphics()出现java.lang.NullPointerException'>java.lang.NullPointerException各位大大，我想画个网格，但是 Graphicsgraphics=panel.getGraphics();这条语句却报出java.lang.NullPointerException？不知什么原因，求解，谢谢.Java">pack...

java.lang.NumberFormatException:Forinputstring:"id"我有一个hibernate映射的树状结构的实体，代码如下Javacode@Entity@Table(name="t_organization")publicclassOrganization{privateintid;privateStringname;pr...

[初学者]为什么这个程序会抛“java.lang.NullPointerException”？MyFirstMIDlet1.java[code]importjavax.microedition.midlet.*;importjavax.microedition.lcdui.*;publicclassMyFirstMIDlet1extendsMIDlet{ privateDisplaymyDispl...

Eclipse3.5热部署WEB程序报java.lang.IllegalArgumentExceptionError ?2010-7-1311:07:33org.apache.catalina.core.AprLifecycleListenerinit信息:TheAPRbasedApacheTomcatNativelibrarywhichallowsoptimalperformanceinprod...

Exceptioninthread"main"java.lang.ArrayIndexOutOfBoundsException:0publicclasshao{publicstaticvoidmain(Stringargs[]){intmonth;month=Short.parseShort(args[0]);switch(month){case1:System.out.pri...

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

java.lang.NullPointerException'>java.lang.NullPointerException高手帮忙看看是什么问题..在线等.代码:publicclasstransferOptionServletextendsHttpServlet{publicvoidinit(ServletConfigconfig)throwsServletException{super.ini...

问题描述 FATALEXCEPTION:main Process:com.virinchi.docopd,PID:19149 java.lang.RuntimeException:Cannotmakecallstoarecycledinstance! atandroid.content.res.TypedArray.getResourceId(TypedArray.java:694) atcom....

求大神帮助java.lang.ClassCastException'>java.lang.ClassCastException问题ArrayListal=(ArrayList)newSqlHelper().executeQuery(sql,paras);这句出错报错是：java.lang.ClassCastException:oracle.jdbc.driver.OracleResultSetIm...

在java文件中启动tomcat6出现java.lang.NoClassDefFoundError'>java.lang.NoClassDefFoundError运行时异常信息大致如下：org/apache/tomcat/util/log/systemLogHandler......某文件x行newEmbedded()......某文件x行getEmbedded().addlifecyclelis...

java.lang.NoSuchMethodException'>java.lang.NoSuchMethodException:Action[/employee]doesnotcontainspecifiedmeSpring配置文件Javacode<beanname="/employee"class="com.petclinic.struts.action.E...

Couldnotloadcom.mysql.jdbc.SQLError.andhasnofunctionalimpact.java.lang.I信息:Illegalaccess:thiswebapplicationinstancehasbeenstoppedalready.Couldnotloadcom.mysql.jdbc.SQLError.Theeventualfollowingstacktr...

MOTOa1200抛java.lang.SecurityException:Applicationnotauthotizedtoaccess点击右边红色标题查看本文完整版：MOTOa1200抛java.lang.SecurityException:ApplicationnotauthotizedtoaccesstherestrictedAPI异常！在真机上运行是抛下面的异常java.lang.Se...

关于Hibernate读取图片问题！！！！！！这是我读取图片的代码！！！！！！publicclassServletIMGextendsHttpServlet{ privateSessionsession; publicvoiddestroy(){ super.destroy();//Justputs"destroy"stringinlog //Putyourcodehere...

Exceptioninthread"main"java.lang.NullPointerException'>java.lang.NullPointerException谁帮我分析分析，我是新手importjavax.swing.JOptionPane;publicclassDemo2{ classMpoint{ doublex,y; Mpoint(){} voidget...

程序代码问题classA{ inty=11; voidf(){ y=y+1; System.out.println(y); }}classBextendsA{ inty=121; voidg(){ y=y+100; System.out.println(y); }}publicclassExample{ publicstaticvoidmain(String[]args){ Bb=n...

androidjava.lang.IllegalStateException异常产生的原因及解决办法Offendingfield:mSpansjava"name="code"> Stringlience=chepai_short.getText().toString()+chepai_number.getText().toString(); openmap.put("lience&...

Exceptioninthread"main"java.lang.ArrayIndexOutOfBoundsException.html'>java.lang.ArrayIndexOutOfBoundsException:Arrayindex我在写连接池程序的时候报如下错误：java">Exceptioninthread"main"java.lang.ArrayIndexOut...