How to Resolve java.lang.NoClassDefFoundError: How to resolve – Part 2

#### NoClassDefFoundErrorSimulator.java
package org.ph.javaee.training1;

import org.ph.javaee.training.util.JavaEETrainingUtil;

/**
 * NoClassDefFoundErrorTraining1
 * @author Pierre-Hugues Charbonneau
 *
 */
public class NoClassDefFoundErrorSimulator {
       
       
        /**
         * @param args
         */
        public static void main(String[] args) {
               System.out.println("java.lang.NoClassDefFoundError Simulator - Training 1");
               System.out.println("Author: Pierre-Hugues Charbonneau");
               System.out.println("http://javaeesupportpatterns.blogspot.com");
              
               // Print current Classloader context
               System.out.println("\nCurrent ClassLoader chain: "+JavaEETrainingUtil.getCurrentClassloaderDetail());
              
               // 1. Create a new instance of CallerClassA
               CallerClassA caller = new CallerClassA();
              
               // 2. Execute method of the caller
               caller.doSomething();
              
               System.out.println("done!");
        }
}

#### CallerClassA.java
package org.ph.javaee.training1;

import org.ph.javaee.training.util.JavaEETrainingUtil;

/**
 * CallerClassA
 * @author Pierre-Hugues Charbonneau
 *
 */
public class CallerClassA {
       
        private final static String CLAZZ = CallerClassA.class.getName();
       
        static {
               System.out.println("Classloading of "+CLAZZ+" in progress..."+JavaEETrainingUtil.getCurrentClassloaderDetail());
        }
       
        public CallerClassA() {
               System.out.println("Creating a new instance of "+CallerClassA.class.getName()+"...");
        }
       
        public void doSomething() {
              
               // Create a new instance of ReferencingClassA
               ReferencingClassA referencingClass = new ReferencingClassA();             
        }
}

#### ReferencingClassA.java
package org.ph.javaee.training1;

import org.ph.javaee.training.util.JavaEETrainingUtil;

/**
 * ReferencingClassA
 * @author Pierre-Hugues Charbonneau
 *
 */
public class ReferencingClassA {

        private final static String CLAZZ = ReferencingClassA.class.getName();
       
        static {
               System.out.println("Classloading of "+CLAZZ+" in progress..."+JavaEETrainingUtil.getCurrentClassloaderDetail());
        }
       
        public ReferencingClassA() {
               System.out.println("Creating a new instance of "+ReferencingClassA.class.getName()+"...");
        }
       
        public void doSomething() {
               //nothing to do...
        }
}


#### JavaEETrainingUtil.java
package org.ph.javaee.training.util;

import java.util.Stack;
import java.lang.ClassLoader;

/**
 * JavaEETrainingUtil
 * @author Pierre-Hugues Charbonneau
 *
 */
public class JavaEETrainingUtil {
       
        /**
         * getCurrentClassloaderDetail
         * @return
         */
        public static String getCurrentClassloaderDetail() {
              
               StringBuffer classLoaderDetail = new StringBuffer();       
               Stack<ClassLoader> classLoaderStack = new Stack<ClassLoader>();
              
               ClassLoader currentClassLoader = Thread.currentThread().getContextClassLoader();
              
               classLoaderDetail.append("\n-----------------------------------------------------------------\n");
              
               // Build a Stack of the current ClassLoader chain
               while (currentClassLoader != null) {
              
                       classLoaderStack.push(currentClassLoader);
                      
                       currentClassLoader = currentClassLoader.getParent();
               }
              
               // Print ClassLoader parent chain
               while(classLoaderStack.size() > 0) {
                      
                       ClassLoader classLoader = classLoaderStack.pop();
                      
                       // Print current                     
                       classLoaderDetail.append(classLoader);
                      
                       if (classLoaderStack.size() > 0) {
                              classLoaderDetail.append("\n--- delegation ---\n");                               
                       } else {
                              classLoaderDetail.append(" **Current ClassLoader**");
                       }
               }
              
               classLoaderDetail.append("\n-----------------------------------------------------------------\n");
              
               return classLoaderDetail.toString();
        }
}