Myth
The OpenOffice.org office suite is written in Java.
That is why it is slow.
Reality
FALSE.
Explanations
OpenOffice.org is written in C ++.
Not convinced?
Then completely remove Java (JRE/JVM/JDK) from your computer and run OpenOffice: It works without problems.
The only reason OpenOffice.org needs java is to run Java applets and some plug-ins written in Java.