java.lang.NoClassDefFoundError: In Rest API JAVA -

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i using project1's class in rest api project2 in eclipse. have added project1 rest api project2's build path still getting exception:

code have used :

@path("/studentreq/json")     @consumes({ mediatype.application_json })     @produces({ mediatype.application_json })     public response requestbasicreport(student stu) {         operationresult operationresult = new operationresult();         boolean responseflag = false;         try {             if (operationresult.issuccessful()) {                 responseflag = true;             } else {                 responseflag = false;                 // send message             }         } catch (exception ex) {             responseflag = false;         } {             // nullify objects             if (responseflag) {                 return response.ok(stu).build(); //put required object in ok(object)             } else {                 return response.servererror().build();             }         }     }

exception:

<html><head><title>apache tomcat/7.0.40 - error report</title><style><!--h1 {font-family:tahoma,arial,sans-serif;color:white;background-color:#525d76;font-size:22px;} h2 {font-family:tahoma,arial,sans-serif;color:white;background-color:#525d76;font-size:16px;} h3 {font-family:tahoma,arial,sans-serif;color:white;background-color:#525d76;font-size:14px;} body {font-family:tahoma,arial,sans-serif;color:black;background-color:white;} b {font-family:tahoma,arial,sans-serif;color:white;background-color:#525d76;} p {font-family:tahoma,arial,sans-serif;background:white;color:black;font-size:12px;}a {color : black;}a.name {color : black;}hr {color : #525d76;}--></style> </head><body><h1>http status 500 - java.lang.noclassdeffounderror: org/project/common/operationresult</h1><hr size="1" noshade="noshade"><p><b>type</b> exception report</p><p><b>message</b> <u>java.lang.noclassdeffounderror: org/project/common/operationresult</u></p><p><b>description</b> <u>the server encountered internal error prevented fulfilling request.</u></p><p><b>exception</b> <pre>javax.servlet.servletexception: java.lang.noclassdeffounderror: org/project/common/operationresult     com.sun.jersey.spi.container.servlet.webcomponent.service(webcomponent.java:420)     com.sun.jersey.spi.container.servlet.servletcontainer.service(servletcontainer.java:537)     com.sun.jersey.spi.container.servlet.servletcontainer.service(servletcontainer.java:699)     javax.servlet.http.httpservlet.service(httpservlet.java:728) </pre></p><p><b>root cause</b> <pre>java.lang.noclassdeffounderror: org/project/common/operationresult     org.project.basil.service.reportrequest.requestbasicreport(reportrequest.java:131)     sun.reflect.nativemethodaccessorimpl.invoke0(native method)     sun.reflect.nativemethodaccessorimpl.invoke(unknown source)     sun.reflect.delegatingmethodaccessorimpl.invoke(unknown source)     java.lang.reflect.method.invoke(unknown source)     com.sun.jersey.spi.container.javamethodinvokerfactory$1.invoke(javamethodinvokerfactory.java:60)     com.sun.jersey.server.impl.model.method.dispatch.abstractresourcemethoddispatchprovider$responseoutinvoker._dispatch(abstractresourcemethoddispatchprovider.java:205)     com.sun.jersey.server.impl.model.method.dispatch.resourcejavamethoddispatcher.dispatch(resourcejavamethoddispatcher.java:75)     com.sun.jersey.server.impl.uri.rules.httpmethodrule.accept(httpmethodrule.java:288)     com.sun.jersey.server.impl.uri.rules.righthandpathrule.accept(righthandpathrule.java:147)     com.sun.jersey.server.impl.uri.rules.resourceclassrule.accept(resourceclassrule.java:108)     com.sun.jersey.server.impl.uri.rules.righthandpathrule.accept(righthandpathrule.java:147)     com.sun.jersey.server.impl.uri.rules.rootresourceclassesrule.accept(rootresourceclassesrule.java:84)     com.sun.jersey.server.impl.application.webapplicationimpl._handlerequest(webapplicationimpl.java:1469)     com.sun.jersey.server.impl.application.webapplicationimpl._handlerequest(webapplicationimpl.java:1400)     com.sun.jersey.server.impl.application.webapplicationimpl.handlerequest(webapplicationimpl.java:1349)     com.sun.jersey.server.impl.application.webapplicationimpl.handlerequest(webapplicationimpl.java:1339)     com.sun.jersey.spi.container.servlet.webcomponent.service(webcomponent.java:416)     com.sun.jersey.spi.container.servlet.servletcontainer.service(servletcontainer.java:537)     com.sun.jersey.spi.container.servlet.servletcontainer.service(servletcontainer.java:699)     javax.servlet.http.httpservlet.service(httpservlet.java:728)

problem has been solved have add project properties--> deployment assembly--> add--> project


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