title: java.lang.NoClassDefFoundError: java.awt.Container
body: <p>I am trying to install Visual Paradigm for UML. During the installation it crashes. This is the stack trace:</p>
  
  <pre><code>Unpacking JRE ...
  Preparing JRE ...
  Starting Installer ...
  java.lang.NoClassDefFoundError: java.awt.Container
      at com.install4j.runtime.installer.frontend.headless.AbstractHeadlessScreenExecutor.init(Unknown Source)
      at com.install4j.runtime.installer.frontend.headless.ConsoleScreenExecutor.&lt;init&gt;(Unknown Source)
      at com.install4j.runtime.installer.frontend.headless.InstallerConsoleScreenExecutor.&lt;init&gt;(Unknown Source)
      at com.install4j.runtime.installer.Installer.getScreenExecutor(Unknown Source)
      at com.install4j.runtime.installer.Installer.runInProcess(Unknown Source)
      at com.install4j.runtime.installer.Installer.main(Unknown Source)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      at java.lang.reflect.Method.invoke(Unknown Source)
      at com.exe4j.runtime.LauncherEngine.launch(Unknown Source)
      at com.install4j.runtime.launcher.Launcher.main(Unknown Source)
  java.lang.NoClassDefFoundError: java.awt.Component
      at javax.swing.ImageIcon.&lt;clinit&gt;(Unknown Source)
      at com.install4j.runtime.installer.frontend.GUIHelper.loadIcon(Unknown Source)
      at com.install4j.runtime.installer.frontend.GUIHelper.&lt;clinit&gt;(Unknown Source)
      at com.install4j.runtime.installer.helper.InstallerUtil.reportException(Unknown Source)
      at com.install4j.runtime.installer.Installer.main(Unknown Source)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
      at java.lang.reflect.Method.invoke(Unknown Source)
      at com.exe4j.runtime.LauncherEngine.launch(Unknown Source)
      at com.install4j.runtime.launcher.Launcher.main(Unknown Source)
  </code></pre>
  
  <p>It appears that the installer can't find a class in the WT library. I can't see how how that can be possible. Does anyone know what is causing this, and how I may fix it?</p>
  
  <p>[System Information]</p>
  
  <pre><code>java version "1.6.0_24"
  OpenJDK Runtime Environment (IcedTea6 1.11.5) (6b24-1.11.5-0ubuntu1~12.04.1)
  OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)
  </code></pre>