Sun Java missing javaws - breaks various applications

[Reuben Firmin]

Binary package hint: sun-java6-bin

After installing sweethome3d on a fresh 11.04 install, it won't launch, due to a missing jar in the sun-java JRE:

[warning] /usr/bin/sweethome3d: Unable to locate /usr/lib/jvm/java-6-sun/jre/lib/javaws.jar in /usr/share/java
Exception in thread "main" java.lang.NoClassDefFoundError: javax/jnlp/UnavailableServiceException
Caused by: java.lang.ClassNotFoundException: javax.jnlp.UnavailableServiceException
 at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
 at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
 at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
Could not find the main class: com.eteks.sweethome3d.SweetHome3D. Program will exit.

[ehcpdeveloper (ehcpdeveloper)]

any solution ?

[ehcpdeveloper (ehcpdeveloper)]

aptitude search jre
p default-jre - Standard Java or Java compatible Runtime
p default-jre-headless - Standard Java or Java compatible Runtime (headless)
p docbook-jrefentry - DocBook XML JRefEntry DTD
p gcj-4.4-jre - Java runtime environment using GIJ/classpath
p gcj-4.4-jre-headless - Java runtime environment using GIJ/classpath (headless version)
p gcj-4.4-jre-lib - Java runtime library for use with gcj (jar files)
p gcj-4.5-jre - Java runtime environment using GIJ/classpath
p gcj-4.5-jre-headless - Java runtime environment using GIJ/classpath (headless version)
p gcj-4.5-jre-lib - Java runtime library for use with gcj (jar files)
p gcj-jre - Java runtime environment using GIJ/classpath
p gcj-jre-headless - Java runtime environment using GIJ/classpath (headless version)
i A icedtea-6-jre-cacao - Alternative JVM for OpenJDK, using Cacao
i A icedtea-6-jre-jamvm - Alternative JVM for OpenJDK, using JamVM
v icedtea6-jre-cacao -
i openjdk-6-jre - OpenJDK Java runtime, using Hotspot JIT
i A openjdk-6-jre-headless ...

[ehcpdeveloper (ehcpdeveloper)]

i think this is caused by sweethome, which looks for sun java files directly. trying to find a solution.

[ehcpdeveloper (ehcpdeveloper)]

I put javaws.jar from another package as file to /usr/lib/jvm/java-6-sun/jre/lib/javaws.jar
then, the problem seems solved.
sweethome started.