java lang noclassdeffounderror

We all know that Java can use the new operator to initialize a class, or use the class. forname method to get a class type instance, and then initialize through the newinstance of this class type instance. we call the former Java static loading and the latter dynamic loading. the latter is often used in many frameworks, and the class name is specified by using the property file. for example, we are familiar

Serialization and deserialization in java Development for Web projects developed based on the GAE platform include Json and Gson, I encountered an exception in the deserialization process when using Gson, as shown in: There is no problem in the program, but an error occurs during running. Then, the run as -- configuration is complete. Before modification: Select Bootstrap Entries and click Add JARs to Add several Gson packages introduced in th

Based on the Gae platform for the development of Web projects in Java development serialization and deserialization has Json,gson, etc., I used the Gson development process encountered in the deserialization process did not find the corresponding class exception, as shown in the following figure: Depressed exception, the program is not where there is a problem, but is in the running process error. And then the run As--configuration configurat

The main cause of this error is the package name in the program. The program is as follows: Package imputationrareprob; public class imputationrareprob {public static void main (string [] ARGs) {system. Out. println (ARGs [0]);} Note the package at the top layer of the program. If you run the package as follows, this error will occur. If you run it in the following way, the noclassrareprob error will occur, but if you use eclipse to run it, there will be no error. The reason is that eclipse has

I used to use JSON technology when I was working on a project. However, at that time, the Project Manager configured all the preparations and provided the tools, I also told us how to use it. At that time, I just thought it was very useful and I did not study it. Today, I wrote a JSON example. The following exception is reported when a call occurs: Java. Lang. classnotfoundexception: org. Apache. common

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 jav

the Java VM. Java. Lang. linkageerror Link error. This error and all its subclasses indicate that a class depends on other classes. After the class is compiled, the dependent class changes its class definition and does not recompile all the classes, in this case, an error occurs. Java.

I encountered a problem yesterday. I changed a common project to a web project. I have already discussed how to modify it. Here I will focus on how to handle the java. lang. outofmemoryerror: Java heap space exception I learned from the online query that this is Java. Lang

Environment: eclipse3.3.0 + myeclipse5.5.1ga (spring2.0 + struts1.1 + hibernate3.1) The error is: Java. Lang. nosuchmethoderrorCode:15:20:54, 093 error contextloader: 203-context initialization failedOrg. springframework. beans. factory. beancreationexception: Error creating bean with name 'sessionfactory 'defined in class path resource [applicationcontext. XML]: Invocation of init method failed; Nested exc

Reprinted from: http://www.51edu.com/it/2008/1120/article_3272.html There are several phenomena that need to be summarized:In Java, the base class of the error class is Java. Lang. error, and the base class of the exception class is Java. Lang. Exception.Similarities:

The exception information is as follows: Exception in thread "Main" Java. Lang. noclassdeffounderror: ORG/Apache/WS/commons/Schema/utils/namespaceprefixlistAt org. Apache. cxf. jaxws. jaxwsclientfactorybean. At org. Apache. cxf. jaxws. jaxwsproxyfactorybean. At CN. navidog. Common. webwervice. Client. rankclient. At CN. navidog. Front. Users. testwebservice. Main

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

Spring version 2.5.5 and JUnit version 4.8.1 use Spring TestContext's SpringJUnit4ClassRunner. This version of JUnit has been used for a long time, and no error will be thrown when writing a simple test. The following error is thrown when you try to write the standard JUnit test code today: Java. lang. NoClassDefFoundError: org/junit/Assume $ AssumptionViolatedEx

Java. Lang. outofmemoryerror: Java heap Space========================================================== ============== Use JavaProgramAn exception occurred when querying a large amount of data from the database:Java. Lang. outofmemoryerror: Java heap Space This exception

Author: Xiaolou Original Website: Http://blog.vonno.com/33993/viewspace_1245 17:50:57/personal classification: Knowledge Summary Cause:An exception occurs when a Java program is used to query a large amount of data from the database:Java. Lang. outofmemoryerror: Java heap SpaceThis exception is thrown if 98% is used for GC and the available heap size is less tha

MyCAT reports java. lang. OutOfMemoryError: Java heap space In the morning, my colleague reported that mycat was suspended again. It was estimated that the memory was still overflow and I checked the error log. INFO | jvm 1 | 07:09:06 | java. lang. OutOfMemoryError:

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.exe cute (LoginAction. java: 27)Org. apache.

SummaryAs an Enterprise Java developer, we always need to implement various functions, such as parsing XML, using HTTP, verifying input and processing dates. The objective of using the Jakarta Commons project is to create components responsible for processing all such common tasks, saving time and allowing you to focus on core business solutions. In this article, we will briefly introduce the Jakarta Commons project, and then demonstrate how to use th

Error querying database. Cause: java. lang. IllegalArgumentException: Mapped Statements collection does not contain value ..., Querying After compiling and running the web successfully, you do not need to connect to the database on the accessed page. If you do not call the object class through reflection, no error is reported,The error message is as follows: [WARNING]Org. springframework. web. util. NestedS

Http://blog.csdn.net/jxzxm1_2/article/details/2499751 An exception occurs when a Java program is used to query a large amount of data from the database:Java. Lang. outofmemoryerror: Java heap SpaceThis exception is thrown if 98% is used for GC and the available heap size is less than 2% in JVM.JVM heap setting refers to the setting of memory space that JVM can a