C:\Programmi\Java\jre6\bin>java -classpath %programfiles\libreoffice\ure\bin JREProperties
Exception in thread "main" java.lang.NoClassDefFoundError: JREProperties
Caused by: java.lang.ClassNotFoundException: JREProperties
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: JREProperties.  Program will exit.