[Libreoffice] Building problem, OpenSuse 10.3, 64bits, javac

I have switched from Ubuntu to OpenSuse.
This OpenSuse is a bare system with the latest update, thus OpenSuse 10.3.
I removed the OpenOffice.

Then I tried:
sudo zypper si -d OpenOffice_org-bootstrap
but that did not work. I say that 10.3 was not yet defined, thus I did the
required installations manually, following the list of 10.2.
With jre/jvm I had problems. I finally installed java-1.6.0-openjdk-1.6.0.
Then it passed the first part of "make" and started building, til:

Entering /home/joost/work/build/build/libreoffice-3.2.99.2/ridljar/com

Making:    com.dpj

/usr/lib64/jvm/jre/bin/javac -source 1.5 -target 1.5 -classpath ".:../
unxlngx6.pro/class:/usr/lib64/jvm/jre/jre/lib/rt.jar:." -d ../
unxlngx6.pro/class  @/tmp/mkq2jhLz
Exception in thread "main" java.lang.NoClassDefFoundError:
com/sun/tools/javac/Main
Caused by: java.lang.ClassNotFoundException: com.sun.tools.javac.Main
        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)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:334)
Could not find the main class: com.sun.tools.javac.Main. Program will exit.
dmake:  Error code 1, while making '../unxlngx6.pro/misc/com_dummy.java'

Must I install another jre/jvm/jdk ?

Joost