java.lang.InstantiationException

tip

This happens when you try to instantiate a class that can't be instantiated, either because the class object is abstract, an interface, an array class, a primitive type, void, or because the class has no nullary constructor.

You have a different solution? A short tip here would help you and many other users who saw this issue last week.

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    • java.lang.InstantiationException at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:48) at java.lang.reflect.Constructor.newInstance(Constructor.java:525) at java.lang.Class.newInstance0(Class.java:374) at java.lang.Class.newInstance(Class.java:327) at org.openxava.model.impl.POJOPersistenceProviderBase.convertSingleKeyType(POJOPersistenceProviderBase.java:207) at org.openxava.model.impl.POJOPersistenceProviderBase.find(POJOPersistenceProviderBase.java:74) at org.openxava.model.impl.POJOPersistenceProviderBase.find(POJOPersistenceProviderBase.java:60) at org.openxava.model.impl.MapFacadeBean.findEntity(MapFacadeBean.java:1475) at org.openxava.model.impl.MapFacadeBean.findEntity(MapFacadeBean.java:1608) at org.openxava.model.impl.MapFacadeBean.getValuesImpl(MapFacadeBean.java:625) at org.openxava.model.impl.MapFacadeBean.getValues(MapFacadeBean.java:100) at org.openxava.model.MapFacade.getValues(MapFacade.java:396) at org.openxava.actions.SearchByViewKeyAction.execute(SearchByViewKeyAction.java:56) at org.openxava.controller.ModuleManager.executeAction(ModuleManager.java:401) at org.openxava.controller.ModuleManager.executeAction(ModuleManager.java:318) at org.openxava.controller.ModuleManager.executeAction(ModuleManager.java:512) at org.openxava.controller.ModuleManager.executeAction(ModuleManager.java:318) at org.openxava.controller.ModuleManager.execute(ModuleManager.java:278) at org.apache.jsp.xava.execute_jsp._jspService(execute_jsp.java:180) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749) at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:605) at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:544) at org.openxava.web.servlets.Servlets.getURIAsStream(Servlets.java:66) at org.openxava.web.dwr.Module.getURIAsStream(Module.java:204) at org.openxava.web.dwr.Module.request(Module.java:62) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.directwebremoting.impl.ExecuteAjaxFilter.doFilter(ExecuteAjaxFilter.java:34) at org.directwebremoting.impl.DefaultRemoter$1.doFilter(DefaultRemoter.java:428) at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:431) at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:283) at org.directwebremoting.servlet.PlainCallHandler.handle(PlainCallHandler.java:52) at org.directwebremoting.servlet.UrlProcessor.handle(UrlProcessor.java:101) at org.directwebremoting.servlet.DwrServlet.doPost(DwrServlet.java:146) at javax.servlet.http.HttpServlet.service(HttpServlet.java:647) at javax.servlet.http.HttpServlet.service(HttpServlet.java:728) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:947) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1009) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:722)

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