Develop Reference

java.lang.NoClassDefFoundError: com/sun/jna/win32/StdCallLibrary after exporting to jar file

I'm trying to write a java application to change my desktop wallpaper using cmd.
The code I have written so far:
package me.kaes3kuch3n.main;
import java.util.HashMap;
import com.sun.jna.Native;
import com.sun.jna.platform.win32.WinDef.UINT_PTR;
import com.sun.jna.win32.*;
public class WallpaperUpdater {
public static void main(String[] args) {
if(args.length != 1) {
System.err.println("Usage: java -jar WallpaperUpdater.jar <path_to_wallpaper>");
} else {
String path = args[0];
SPI.INSTANCE.SystemParametersInfo(
new UINT_PTR(SPI.SPI_SETDESKWALLPAPER),
new UINT_PTR(0),
path,
new UINT_PTR(SPI.SPIF_UPDATEINIFILE | SPI.SPIF_SENDWININICHANGE));
}
}
public interface SPI extends StdCallLibrary {
//from MSDN article
long SPI_SETDESKWALLPAPER = 20;
long SPIF_UPDATEINIFILE = 0x01;
long SPIF_SENDWININICHANGE = 0x02;
SPI INSTANCE = (SPI) Native.loadLibrary("user32", SPI.class, new HashMap<Object, Object>() {
/**
*
*/
private static final long serialVersionUID = 1L;
{
put(OPTION_TYPE_MAPPER, W32APITypeMapper.UNICODE);
put(OPTION_FUNCTION_MAPPER, W32APIFunctionMapper.UNICODE);
}
});
boolean SystemParametersInfo(
UINT_PTR uiAction,
UINT_PTR uiParam,
String pvParam,
UINT_PTR fWinIni
);
}
}
It works just fine when I'm running it using Eclipse but after exporting it to a jar file it throws an error:
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/jna/win32/StdCallLibrary
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at me.kaes3kuch3n.main.WallpaperUpdater.main(WallpaperUpdater.java:17)
Caused by: java.lang.ClassNotFoundException: com.sun.jna.win32.StdCallLibrary
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 13 more
I've added both the jna.jar and the jna-platform.jar to the build path, but it won't work. What am I missing?

java.lang.ClassNotFoundException: org.hibernate.collection.internal.PersistentBag - Not able to find the class that I am looking for [duplicate]

This question already has answers here:
What causes and what are the differences between NoClassDefFoundError and ClassNotFoundException?
(15 answers)
Closed 6 years ago.
I am new at working with JPA and Hibernate so I have some problems with the typequery. I have a function that receives a string and the name of a "Departamento", and retrieves the object ("Carrera") that has that "Departamento" associated with it. In sqldeveloper I have no problem, but in typedquery it has become a bit of a hassle. I am sure that the syntax of my query is wrong, but I don't know how to fix. I would be grateful if someone could help me.
ClientePrueba.java:
public class ClientePrueba {
public static void main(String[] args) throws NamingException {
DepartamentosBeanRemote departamentosBean = (DepartamentosBeanRemote) InitialContext.doLookup("EjemploEJB/DepartamentosBean!com.servicios.DepartamentosBeanRemote");
MateriasBeanRemote materiasBean = (MateriasBeanRemote) InitialContext.doLookup("EjemploEJB/MateriasBean!com.servicios.MateriasBeanRemote");
CarrerasBeanRemote carrerasBean = (CarrerasBeanRemote) InitialContext.doLookup("EjemploEJB/CarrerasBean!com.servicios.CarrerasBeanRemote");
System.out.println("Obtengo todas las carreras del departamento MATEMATICAS");
List<Carrera> carreras = carrerasBean.obtenerPorDepartamento("MATEMATICAS");
for (Carrera car : carreras) {
System.out.println(car.getNombre());
}
}
}
CarrerasBean.java
/**
* Session Bean implementation class CarrerasBean
*/
#Stateless
public class CarrerasBean implements CarrerasBeanRemote {
#PersistenceContext
private EntityManager em;
/**
* Default constructor.
*/
public CarrerasBean() {
// TODO Auto-generated constructor stub
}
#Override
public List<Carrera> obtenerPorDepartamento(String departamento) {
TypedQuery<Carrera> query = em.createQuery("SELECT c FROM Carrera c WHERE c.departamento.nombre = :depto", Carrera.class)
.setParameter("depto", departamento);
return query.getResultList();
}
}
Error:
Exception in thread "main" javax.ejb.EJBException:
java.lang.ClassNotFoundException:
org.hibernate.collection.internal.PersistentBag at
org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:236)
at
org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:181)
at
org.jboss.ejb.client.EJBInvocationHandler.invoke(EJBInvocationHandler.java:144)
at com.sun.proxy.$Proxy4.obtenerPorDepartamento(Unknown Source) at
com.cliente.ClientePrueba.main(ClientePrueba.java:130) Caused by:
java.lang.ClassNotFoundException:
org.hibernate.collection.internal.PersistentBag at
java.net.URLClassLoader$1.run(Unknown Source) at
java.net.URLClassLoader$1.run(Unknown Source) at
java.security.AccessController.doPrivileged(Native Method) at
java.net.URLClassLoader.findClass(Unknown Source) at
java.lang.ClassLoader.loadClass(Unknown Source) at
sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at
java.lang.ClassLoader.loadClass(Unknown Source) at
java.lang.Class.forName0(Native Method) at
java.lang.Class.forName(Unknown Source) at
org.jboss.marshalling.AbstractClassResolver.loadClass(AbstractClassResolver.java:131)
at
org.jboss.marshalling.AbstractClassResolver.resolveClass(AbstractClassResolver.java:112)
at
org.jboss.marshalling.river.RiverUnmarshaller.doReadClassDescriptor(RiverUnmarshaller.java:949)
at
org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1256)
at
org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:276)
at
org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:224)
at
org.jboss.marshalling.river.RiverUnmarshaller.readFields(RiverUnmarshaller.java:1746)
at
org.jboss.marshalling.river.RiverUnmarshaller.doInitSerializable(RiverUnmarshaller.java:1659)
at
org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1286)
at
org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:276)
at
org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:224)
at
org.jboss.marshalling.river.RiverUnmarshaller.doReadCollectionObject(RiverUnmarshaller.java:180)
at
org.jboss.marshalling.river.RiverUnmarshaller.readCollectionData(RiverUnmarshaller.java:777)
at
org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:653)
at
org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:209)
at
org.jboss.marshalling.AbstractObjectInput.readObject(AbstractObjectInput.java:41)
at
org.jboss.ejb.client.remoting.MethodInvocationResponseHandler$MethodInvocationResultProducer.getResult(MethodInvocationResponseHandler.java:103)
at
org.jboss.ejb.client.EJBClientInvocationContext.getResult(EJBClientInvocationContext.java:276)
at
org.jboss.ejb.client.EJBObjectInterceptor.handleInvocationResult(EJBObjectInterceptor.java:64)
at
org.jboss.ejb.client.EJBClientInvocationContext.getResult(EJBClientInvocationContext.java:290)
at
org.jboss.ejb.client.EJBHomeInterceptor.handleInvocationResult(EJBHomeInterceptor.java:88)
at
org.jboss.ejb.client.EJBClientInvocationContext.getResult(EJBClientInvocationContext.java:290)
at
org.jboss.ejb.client.TransactionInterceptor.handleInvocationResult(TransactionInterceptor.java:46)
at
org.jboss.ejb.client.EJBClientInvocationContext.getResult(EJBClientInvocationContext.java:290)
at
org.jboss.ejb.client.ReceiverInterceptor.handleInvocationResult(ReceiverInterceptor.java:129)
at
org.jboss.ejb.client.EJBClientInvocationContext.getResult(EJBClientInvocationContext.java:265)
at
org.jboss.ejb.client.EJBClientInvocationContext.awaitResponse(EJBClientInvocationContext.java:453)
at
org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:202)
... 4 more

It looks like you dont have a hibernate jars in the client classpath.
I mean this dependency:
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
Check your client classpath and add this hibernate jars.

Run testNG programatically in Eclipse using maven without a plugin

I want to run TestNG without using the "TestNG eclipse plugin" in a normal maven quickstart project.
Whatever I read from http://testng.org/doc/documentation-main.html#running-testng-programmatically & other sources, I got idea of using classes as:
MessageUtil.java
package com.mytests.testng;
public class MessageUtil {
private String message;
public MessageUtil(String message){
this.message = message;
}
public String printMessage(){
System.out.println(message);
return message;
}
}
TestNGExample.java
package com.mytests.testng;
import org.testng.Assert;
import org.testng.annotations.Test;
public class TestNGExample {
String message = "Hello World";
MessageUtil messageUtil = new MessageUtil(message);
#Test
public void testPrintMessage() {
Assert.assertEquals(message,messageUtil.printMessage());
}
}
App.java
package com.mytests.testng;
import org.testng.TestListenerAdapter;
import org.testng.TestNG;
public class App
{
public static void main( String[] args )
{
System.out.println( "Hello World!" );
TestListenerAdapter tla = new TestListenerAdapter();
TestNG testNG = new TestNG();
#SuppressWarnings("rawtypes")
Class[] testClasses = new Class[]{
TestNGExample.class
};
testNG.setTestClasses(testClasses);
testNG.addListener(tla);
testNG.run();
}
}
But here I am getting exceptions as:
Exception Box 1
Exception Box 2
Exception in Console
Exception in thread "main" java.lang.NoClassDefFoundError: org/testng/ITestListener
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.privateGetMethodRecursive(Unknown Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at sun.launcher.LauncherHelper.validateMainClass(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.testng.ITestListener
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 7 more
I am not getting why there is a problem even though I don't get any compile time error. The TestNG dependency is successfully downloaded and helps in writing the code. But the class doesn't load on run time I guess. What can be done?
If not using any XML is causing an error, I can use it as well, but not the eclipse plugin for TestNG.
P.S.: I am new to TestNG and this is my first program

This issue is happening because at runtime, testng jar is not available in classpath. You can resolve this by using <scope>compile</scope> instead of <scope>test</scope> in your testng pom dependency.

Java Reflections 'NoClassDef' error

I'm trying to browse all classes that have implemented an interface using the custom libary Reflections. Here is my source :
public static List<IModdable> getAllModClasses() {
Reflections reflections = new Reflections("mod.api.core"); //getting error here
Set<Class<? extends IModdable>> classes = reflections.getSubTypesOf(IModdable.class);
List<IModdable> modList = new ArrayList<IModdable>();
for (Class<? extends IModdable> c : classes)
try {
modList.add((IModdable) c.newInstance());
} catch (Exception ex) {
err(String.format("Could not load mod %s !", c.getName()));
}
return modList;
}
error:
Exception in thread "Client thread" java.lang.NoClassDefFoundError: javassist/bytecode/ClassFile
at org.reflections.adapters.JavassistAdapter.getOfCreateClassObject(JavassistAdapter.java:100)
at org.reflections.adapters.JavassistAdapter.getOfCreateClassObject(JavassistAdapter.java:24)
at org.reflections.scanners.AbstractScanner.scan(AbstractScanner.java:30)
at org.reflections.Reflections.scan(Reflections.java:238)
at org.reflections.Reflections.scan(Reflections.java:204)
at org.reflections.Reflections.<init>(Reflections.java:129)
at org.reflections.Reflections.<init>(Reflections.java:170)
at org.reflections.Reflections.<init>(Reflections.java:143)
at mod.api.core.CoreProvider.getAllModClasses(CoreProvider.java:17)
at mod.api.core.ModCore.onLoad(ModCore.java:13)
at net.minecraft.client.Minecraft.run(Minecraft.java:405)
at net.minecraft.client.main.Main.main(Main.java:114)
at Start.main(Start.java:11)
Caused by: java.lang.ClassNotFoundException: javassist.bytecode.ClassFile
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 13 more
The mod.api.core package exits. So that shouldn't be the error.

java.lang.NoClassDefFoundError: javassist/bytecode/ClassFile
You can fix the issue by adding javassist-3.12.1.GA.jar to your classpath

Eclipse cannot find the main class in JFace?

I'm working though a book SWT/JFace IN ACTION by Manning Press.
When I added JFace, Eclipse for some reason could not find the main class though it is plainly present.
Here is the code
package com.swtjface.ChTwo;
import org.eclipse.jface.window.*;
import org.eclipse.swt.*;
import org.eclipse.swt.widgets.*;
public class HelloSWT_JFace extends ApplicationWindow{
/**
* #param args
*/
public HelloSWT_JFace(){
super(null);
}
protected Control createContents(Composite parent){
Text helloText = new Text(parent, SWT.CENTER);
helloText.setText("Hello SWT and JFace!");
parent.pack();
return parent;
}
public static void main(String[] args) {
// TODO Auto-generated method stub
HelloSWT_JFace awin = new HelloSWT_JFace();
awin.setBlockOnOpen(true);
awin.open();
Display.getCurrent().dispose();
}
}
The reject message I get from Eclipse is...
Could not find the main class: com.swtjface.ChTwo.HelloSWT_JFace.
Program will exit.
Here is the exception...
java.lang.NoClassDefFoundError: org/eclipse/core/runtime/IProgressMonitor
Caused by: java.lang.ClassNotFoundException: org.eclipse.core.runtime.IProgressMonitor
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
Exception in thread "main"

You need at least 2 more jars to use JFace:
org.eclipse.equinox.common
org.eclipse.core.commands
See Using JFace outside the Eclipse platform for more details.

You need to add jar file for "org.eclipse.core.runtime.IProgressMonitor class"
Check this link.