java lang exception

An error occurred when Tomcat was started today. Severe: end event threw exceptionJava. Lang. illegalargumentexception: Can't convert argument: NULLAt org. Apache. tomcat. util. introspectionutils. Convert (introspectionutils. Java: 999)At org. Apache. tomcat. util. digester. callmethodrule. End (callmethodrule. Java: 523)At org. Apache. tomcat. util. digester. R

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. factorybe

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.

Java. lang. NoClassDefFoundError: org/jboss/util/file/ArchiveBrowser $ FilterAt org. hibernate. ejb. HibernatePersistence. createEntityManagerFactory (HibernatePersistence. java: 119)At javax. persistence. Persistence. createEntityManagerFactory (Persistence. java: 83)At javax. persistence. Persistence. createEntityMan

When classloader is used to load resources, the following errors often occur: Exception in thread "Main" Java. Lang. noclassdeffounderror: COM/tools/resultAt java. Lang. Class. getdeclaredconstructors0 (native method)At java.

Struts2 java. lang. StackOverflowError org. apache. struts2.json. JSONWriter, struts2printwriter 1. Problem description: The page accesses action asynchronously. The action method encapsulates data through map. The struts result type is set to json, and an error is reported in the background. June 25 6:54:33 org. apache. catalina. core. standardWrapperValve invokeSEVERE: Servlet. service () for servlet [def

Java oci connection oracle throwing java. lang. UnsatisfiedLinkError: ocijdbc11..., ocijdbc11 First, the oracle client is successfully installed. Use the sqlplus tool to connect to the local service name configured by TNSNAMES. ORA, for example: Conn user/pass @ dbName If the connection is successful, the client is successfully installed. To use the oci method t

This error occurs during the first running! Exception Javax. servlet. ServletException: Servlet execution threw an exception Root cause Java. lang. ExceptionInInitializerErrorClassmate. HibernateUtil. Classmate. DbOperate. getUser (DbOperate. java: 25)Classmate.LoginAction.

Java reflection (java. lang. reflect ), 1. Ordinary full and hungry Chinese Package org. bighead. test2; public class TestPrivate {private String str = "strPrivate"; private static final TestPrivate TESTPRIVATE = new TestPrivate (); // full Chinese and hungry Chinese private TestPrivate () {super (); System. out. println (str);} public TestPrivate getInstance ()

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