java lang classcastexception

By default, the image display function is not enabled for Tomcat/resin in Linux. You need to add support options.In Linux, when we use Java image packages to process images, we often encounter Java. lang. noclassdeffounderror: Sun. AWT. x11graphicsenvironment, because the Java Virtual Machine needs local X-server suppo

Environment Myeclipse 8.6 + JBoss 6.0 + JDK 1.6.13 + EJB 3.0 Problem The following exception occurs in the entitybean test: Java. Lang. illegalargumentexception: unknownentity user. Solution Place persistence. xml under the SRC \ META-INF directory, if the src directory does not have a META-INF folder, you can create a new one. Error: do not place persistence. xml under \ webroot \ META-INF. References Http

Java. lang. IllegalArgumentException: Illegal character in query at index 261, LoadingPage is used in BaseFragment, while AsyncHttpClient is used for online loading of LoadingPage.Always reported java. lang. IllegalArgumentException: Illegal character in query at index 261If the resolution fails, you can change it to

Android Xposed framework has the java. lang. IllegalAccessError: Class ref in pre-verified class resolved to unexpected implementation problem, android The first time I played the Xposed framework, I wrote a demo in the format of multiple demos and found that public abstract void handleLoadPackage(LoadPackageParam lpparam) throws Throwable; Method, go/Data/de. robv. android. xposed. installer/log/error. log

Java. lang. OutOfMemoryError: GC overhead limit exceeded, limitexceeded The reason for writing it down is that you don't want to find it everywhere next time. Many times the error message is the same, but there are many causes. I tested the adoption of a virtual machine startup:-XX:-UseGCOverheadLimit Write down the original article link and mark it as "thank you; Http://www.cnblogs.com/hucn/p/3572384

1.Warning: Failed to register in JMX: javax. Naming. namingexception: cocould not load resource factory class [root exception is Java. Lang. classnotfoundexception: org. Apache. commons. DBCP. basicdatasourcefactory] 2.Caused by: Java. Lang. noclassdeffounderror: ORG/Apache/commons/pool/impl/genericobjectpool I encou

Java. Lang. illegalaccesserror: tried to access field org. slf4j. impl. staticloggerbinder. Singleton from class org. slf4j. loggerfactory When using hbm2java, using the hibernate-distribution-3.3.1.GA-dist version, after the program and configuration file is completed, the running program appears exception in thread "Main"Java.

Start the Tomcat server on the eclipse server to run the web project. An exception occurs. Java. Lang. classnotfoundexception Information: Set web app root system property:'Webapp. root' =[F: \ work_space_soft \. Metadata \. plugins \ org. Eclipse. WST. server. Core \ tmp0 \ wtpwebapps \ lottes_03_14 \]3:14:43Org. Apache. Catalina. Core. applicationcontext log information: initializing log4j from[F:

ZendStudioforEclipse's java. lang. NullPointerException solution. Of course, this item is very memory-consuming and will not be recommended for configuration. recently, I found that this error occurs when ZendStudioforEclipse is enabled after the PHP project is created. Aninterna is very memory-consuming, and it is not recommended if the configuration is almost complete. Recently, this error occurs when Ze

Java. Lang. illegalargumentexception: Can't find neither a featuretype nor a coverageinfo named... Solution see http://jira.codehaus.org/browse/GEOS-3337 Only on layers we have uploaded ourselves, getfeatureinfoRequest when clicking on a feature yields the following, instead ofTable. Java. Lang. illegalargumentex

Java. Lang. noclassdeffounderror: COM/opensymphony/xwork2/util/textutils This exception occurs when struts 2.1.8 is used with strut2 JSON plug .. Java. Lang. noclassdeffounderror: COM/opensymphony/xwork2/util/textutils The reason is that the JSON plug-in version is not suitable ..Some say that the JSON plug 3.3 is u

Caused by: java. lang. ClassNotFoundException: org. apache. poi. ss. formula. udf. UDFFinder, poiformula get Error Caused by: java. lang. ClassNotFoundException: org. apache. poi. ss. formula. udf. UDFFinder I receive this error because of version differences between poi (3.9) and poi-ooxml (3.10. Check your version.

Atitit. Exception in thread "main" java. lang. Error: Unresolved compilation problem:, atitit Atitit. Exception in thread "main" java. lang. Error: Unresolved compilation problem: 1.1. check whether a class file is generated and the size of the class is 1. 1.2. Observe the ide source file. There is a red cross on the

Java. lang. UnsatisfiedLinkError: % 1 is not a valid Win32 application ., Not a 32-bit valid application When JNA calls the dll library, the following error occurs: //// // Introduce the DLL library through JNA // /// *** ID_FprCap.dll fingerprint collection, fingerprint device initialization, setting, etc. */public interface ID_FprCap extends StdCallLibrary {ID_Fpr fpr = ID_Fpr.INSTANCE; ID_FprCap fprCap =

Problem description: serious: Servlet/Library Management System threw load () exception Java. Lang. classnotfoundexception: org. Apache. Struts. Action. actionservlet At org. Apache. Catalina. loader. webappclassloader. loadclass (webappclassloader. Java: 1714) At org. Apache. Catalina. loader. webappclassloader. loadclass (webappclassloader.

encoding JAVA. lang. numberformatexception: NULL, at java. lang. integer. parseint (integer. java: 415) at java. lang. integer. valueof (integer.

Exception in thread "com. mchange. v2.async. threadpoolasynchronousrunner $ poolthreaD-#2 "Java. Lang. noclassdeffounderror: cocould not initialize class com. MySQL. JDBC. connectionimpl Sqlclientinfoexception is only available in JDK 6.0 The solution to the error is as follows: According to the error message, the "Java/SQL/sqlclientinfoexception" informa

Symptom: It can be compiled by using eclipse and other IDE development tools, but can be run. However, it can be compiled by saving dos in notepad and cannot be run. The error "exception in thread" Main "Java. lang. noclassdeffounderror ". Solution: 1. It is impossible to set environment variables incorrectly because integrated development tools can run 2. I wrote a simple "helloworld" again in no

An error occurred in the production environment of the latest project: At org. hibernate. impl. sessionfactoryimpl. Get (sessionfactoryimpl. Java: 339)At org. hibernate. impl. sessionfactoryimpl. getquery (sessionfactoryimpl. Java: 411)At org. hibernate. impl. sessionimpl. getqueries (sessionimpl. Java: 884)At org. hibernate. impl. sessionimpl. iterate (session

When you use a jxl package to operate an Excel file, an error occurs when copying a large number of cells. The information is as follows: 1 Java. Lang. arrayindexoutofboundsexception: 441 2 Jxl. Biff. indexmapping. getnewindex (indexmapping. Java: 68 ) 3 Jxl. Biff. formattingrecords. rationalize (formattingrecords.