Bei der Installation von Visual Paradigm für UML wird Folgendes angezeigt: java.lang.NoClassDefFoundError: java.awt.Container

Ich habe kürzlich Visual Paradigm for UML auf mein System heruntergeladen (Ubuntu 12.0.4 LTS).

Als ich versuchte, es zu installieren, schlug es fehl. Hier ist der Stacktrace:

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.<init>(Unknown Source) at com.install4j.runtime.installer.frontend.headless.InstallerConsoleScreenExecutor.<init>(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.<clinit>(Unknown Source) at com.install4j.runtime.installer.frontend.GUIHelper.loadIcon(Unknown Source) at com.install4j.runtime.installer.frontend.GUIHelper.<clinit>(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) 

Es scheint, dass das Installationsprogramm keine Klasse in der WT-Bibliothek finden kann. Ich kann nicht sehen, wie das möglich ist. Weiß jemand, was dies verursacht und wie ich es reparieren kann?

[Aktualisieren]

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)