title: Applet Trouble : java.lang.NoClassDefFound
body: <p>I'm having a bit of trouble with an applet using the SDK for the u.are.u 4500 biometric fingerprint reader.<br>
  When I test the applet locally using NetBeans, the applet works fine.
  <img src="https://i.stack.imgur.com/ptG6r.png" alt="Applet test. Local"></p>
  
  <p>The problem is when I try to publish the applet.
  <img src="https://i.stack.imgur.com/Qg6Vw.png" alt="Applet web test. Error detail"></p>
  
  <p>I always get the "<strong>java.lang.NoClassDefFound</strong>".
  I modified the java configuration so that the server config and my workstation config matches.</p>
  
  <p>The SDK is installed in <strong>c:\java\jdk1.7.0_07</strong><br>
  The JRE is installed in <strong>c:\java\jre7</strong>
  <img src="https://i.stack.imgur.com/D9chn.png" alt="enter image description here"></p>
  
  <p>The jar files for the biometric fingerprint reader are:</p>
  
  <ul>
  <li>dpfpenrollment.jar</li>
  <li>dpfpverification.jar</li>
  <li>dpotapi.jar</li>
  <li>dpotjni.jar</li>
  </ul>
  
  <p>The CLASSPATH is:</p>
  
  <pre><code>C:\Java\jdk1.7.0_07\jre\lib\ext;
  C:\Java\jdk1.7.0_07\jre\lib\ext\mysql-connector-java-5.1.22-bin.jar;
  C:\Java\jdk1.7.0_07\jre\lib\ext\dpfpenrollment.jar;
  C:\Java\jdk1.7.0_07\jre\lib\ext\dpfpverification.jar;
  C:\Java\jdk1.7.0_07\jre\lib\ext\dpotapi.jar;
  C:\Java\jdk1.7.0_07\jre\lib\ext\dpotjni.jar;
  </code></pre>
  
  <p>JAVA_HOME is:</p>
  
  <pre><code>c:\java\jre7
  </code></pre>
  
  <p>I have tried putting the jar files in the lib folder, put the result is the same.
  I googled for this error, but nothing I find helps me solve this.</p>
  
  <p>Any help is appreciated...<br>
  Thanks</p>