JAVA upgrade

[domainuniverzum]

Advisable to upgrade from java 1.3 to 1.5 in PLESK 7.5.3 ? Dos it make any confusion in Tomcat or in PLESK? Thanks for yor answer.

Some article:

http://java.sun.com/developer/technicalArticles/J2SE/5reasons.html

http://java.sun.com/performance/reference/whitepapers/5.0_performance.html

download:
http://java.sun.com/j2se/1.5.0/download.jsp