I am about 4 hours into JAVA and am making a big mess of it.

Last night (at home) I installed the latest JAVA and NetBeans and got a "Hello World"

Today I installed the 2 at work and am getting errors involving: "NoClassDefFoundError"

(even with what worked last night at home)

I found an example of an XML parsing code and cut and pasted it as my next example.

Here is the code:

 * To change this template, choose Tools | Templates
 * and open the template in the editor.

import org.w3c.dom.*;
import org.xml.sax.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.DOMSource;

public class GetData{
  static public void main(String[] arg) {
      BufferedReader bf = new BufferedReader(new InputStreamReader(;
      System.out.print("Enter XML file name: ");
      String xmlFile = bf.readLine();
      File file = new File(xmlFile);
      if (file.exists()){
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = factory.newDocumentBuilder();
        Document doc = builder.parse(xmlFile);
//        Create transformer
        Transformer tFormer = TransformerFactory.newInstance().newTransformer();
//        Output text type
        tFormer.setOutputProperty(OutputKeys.METHOD, "text");
//        Write the document to a file
        Source source = new DOMSource(doc);
        Result result = new StreamResult(System.out);
        tFormer.transform(source, result);
        System.out.println("File not found!");
    catch (Exception e){

My directory structure for the files is (Windows 7 here at work / XP at home): C:\Libraries\Documents\NetBeansProjects\GetData

Within my build folder - Classes and within classes is: GetData.class

here is the HTML that is generated:

<?xml version="1.0" encoding="UTF-8" ?> 
- <!--  You may freely edit this file. See commented blocks below for 
- <!--  some examples of how to customize the build. 
- <!--  (If you delete it and reopen the project it will be recreated.) 
- <!--  By default, only the Clean and Build commands use this build script. 
- <!--  Commands such as Run, Debug, and Test only use this build script if 
- <!--  the Compile on Save feature is turned off for the project. 
- <!--  You can turn off the Compile on Save (or Deploy on Save) setting 
- <!--  in the project's Project Properties dialog box.
- <project name="GetData" default="default" basedir=".">
  <description>Builds, tests, and runs the project GetData.</description> 
  <import file="nbproject/build-impl.xml" /> 
- <!-- 
    There exist several targets which are by default empty and which can be 
    used for execution of your tasks. These targets are usually executed 
    before and after some main targets. They are: 

      -pre-init:                 called before initialization of project properties
      -post-init:                called after initialization of project properties
      -pre-compile:              called before javac compilation
      -post-compile:             called after javac compilation
      -pre-compile-single:       called before javac compilation of single file
      -post-compile-single:      called after javac compilation of single file
      -pre-compile-test:         called before javac compilation of JUnit tests
      -post-compile-test:        called after javac compilation of JUnit tests
      -pre-compile-test-single:  called before javac compilation of single JUnit test
      -post-compile-test-single: called after javac compilation of single JUunit test
      -pre-jar:                  called before JAR building
      -post-jar:                 called after JAR building
      -post-clean:               called after cleaning build products

    (Targets beginning with '-' are not intended to be called on their own.)

    Example of inserting an obfuscator after compilation could look like this:

        <target name="-post-compile">
                <fileset dir="${build.classes.dir}"/>

    For list of available properties check the imported 
    nbproject/build-impl.xml file. 

    Another way to customize the build is by overriding existing main targets.
    The targets of interest are: 

      -init-macrodef-javac:     defines macro for javac compilation
      -init-macrodef-junit:     defines macro for junit execution
      -init-macrodef-debug:     defines macro for class debugging
      -init-macrodef-java:      defines macro for class execution
      -do-jar-with-manifest:    JAR building (if you are using a manifest)
      -do-jar-without-manifest: JAR building (if you are not using a manifest)
      run:                      execution of project 
      -javadoc-build:           Javadoc generation
      test-report:              JUnit report generation

    An example of overriding the target for project execution could look like this:

        <target name="run" depends="GetData-impl.jar">
            <exec dir="bin" executable="launcher.exe">
                <arg file="${dist.jar}"/>

    Notice that the overridden target depends on the jar target and not only on 
    the compile target as the regular run target does. Again, for a list of available 
    properties which you can use, check the target you are overriding in the
    nbproject/build-impl.xml file. 


I see from searching that how things are named is key to this error.

Can you explain what I need to look for? (again I am as new as they come today)

The tutorial for this example read as if I could cut and paste the code and go.

(a little frustrated)


It would be a bit difficult to diagnose the problem without having a look at the setup. Do you get the same error for a fresh java project created which contains a single Hello world code? The build file shouldn't be a problem since AFAIK it is auto-generated by Netbeans (unless you have messed around with it). Also paste the complete stack trace you are getting.