java lang illegalstateexception

First, let's take a look at the exception: Java. Lang. instantiationexception: COM. IBM. msdk. UI. session. View. Actions. simportactionAt java. Lang. Class. newinstance0 (class. Java: 340)At java.

Tomcat outofmemoryerror (permgen space) Solution Recently I have been familiar with a project that has been developed for several years. I need to port the database from MySQL to Oracle. First, I need to point the JDBC connection to MySQL and package it into tomcat to run it. There is no problem, however, when the JDBC connection is directed to Oracle, Tomcat continuously throws Java. lang. outofmemoryerro

Severe: servlet. Service () for servlet JSP threw exception Java. Lang. linkageerror: loader constraints violated when linking javax/El/expressionfactory class At org. Apache. jsp. login_jsp. _ jspinit (login_jsp.java: 23)At org. Apache. Jasper. runtime. httpjspbase. INIT (httpjspbase. Java: 52)At org. Apache. Jasper. servlet. jspservletwrapper. getservlet (jspse

Bug information: 10-16 17:27:20. 250: D/androidruntime (14662): Shutting Down VM10-16 17:27:20. 250: W/dalvikvm (14662): threadid = 1: thread exiting with uncaught exception (group = 0x40a5e228)10-16 17:27:20. 250: E/androidruntime (14662): Fatal exception: Main10-16 17:27:20. 250: E/androidruntime (14662): Java. Lang. illegalargumentexception: parameter must be a descendant of this view10-16 17:27:20. 250:

Spring3.1 startup error: Exception in thread "Main" Java. Lang. noclassdeffounderror: ORG/Apache/commons/logging/logfactory At org. springframework. Core. collectionfactory. At org. springframework. Core. simplealiasregistry. At org. springframework. Beans. Factory. Support. defaultsingletonbeanregistry. At org. springframework. Beans. Factory. Support. factorybeanregistrysupport. At org. springframework. B

My exceptions-java. lang. NullPointerException, nullpointerexception I believe everyone is very familiar with this exception. I believe that everyone has met this exception in their programming career. During the development of 3.1 of colleges and universities, such errors were thrown out again. This is a small bug, but when it comes to it, it will make you sick for half a day, because the program will be s

Severe: servlet. Service () for servlet JSP threw exceptionJava. Lang. linkageerror: loader Constraint Violation: when resolving Interface Method "Javax. servlet. jsp. jspapplicationcontext. getexpressionfactory () ljavax/El/expressionfactory;" The Class Loader (instance Org/Apache/Jasper/servlet/jasperloader) of the current class, org/Apache/JSP/index_jsp, and the class loader (instance Org/Apache/Catalina/loader/standardclassloader) for resolved cla

It is difficult to modify. class. project on the Internet, and sometimes it may not work. The following method is suitable for projects that have referenced jar, but ClassNotFound is used at runtime. Try the following method: Severe: Error Processing ing application listener of class org. springframework. web. context. contextLoaderListenerjava. lang. classNotFoundException: org. springframework. web. context. contextLoaderListenerat org. apache. cat

Package java. Lang. Reflect; Import java. Security. accesscontroller;Import sun. Reflect. langreflectaccess;Import sun. Reflect. reflectionfactory; /**** Used to determine the element type. The element type is an int-type number, and its bit represents different descriptors.** Comment by liqiang** @ Author nakul saraiya* @ Author kenth Russell*/PublicClass modifi

I encountered this depressing problem when I first set up the platform environment: (it has been a long time) The environment I used at the beginning was myeclipse 6.5 (full installation version) + JDK 6 (Update 2) + Tomcat 6.0. This environment should be more appropriate, However, after the environment is set up, the corresponding form cannot be displayed, and the following inexplicable error will be reported: Java.

Severe: exception starting filter struts2 Java. Lang. nullpointerexception At com. opensymphony. xwork2.util. filemanager $ filerevision. needsreloading (filemanager. Java: 209) At com. opensymphony. xwork2.util. filemanager. fileneedsreloading (filemanager. Java: 60) At com. opensymphony. xwork2.config. providers. xml

, such as JBoss and WebLogic, share the same principle. I. java. lang. outofmemoryerror: The full name of permgen space is permanent generation space, which refers to the permanent storage area of the memory. This memory is mainly used by JVM to store class and meta information, when a class is loaded, it will be placed in the permgen space. It is different from the heap region where the class instance is s

Java. lang. String. getBytes (String charsetName) Method Instance, string. getbytes Java. lang. String. getBytes (String charsetName)The encoding method uses the byte sequence of the specified character set and stores the result to a new byte array.Statement Below isJava. lang