Howtoforge posted a tutorial about installing Tomcat6 with SUN-Java and Apache2 integration on Ubuntu 10.04

Apache Tomcat (or Jakarta Tomcat or simply Tomcat) is an open source servlet container developed by the Apache Software Foundation (ASF). Tomcat implements the Java Servlet and the JavaServer Pages (JSP) specifications from Sun Microsystems, and provides a "pure Java" HTTP web server environment for Java code to run. Tomcat should not be confused with the Apache web server, which is a C implementation of an HTTP web server; these two web servers are not bundled together. Apache Tomcat includes tools for configuration and management, but can also be configured by editing XML configuration files.

  How To Install Tomcat6 With SUN-Java And Apache2 Integration On Ubuntu 10.04 With Virtual Hosts