Install Java 1.5

To check: Run java -version on the command line
If not correct, download the J2SE SDK from:
- http://java.sun.com/j2se/1.5.0/download.jsp
- Mac OS X users will have Java 1.5 by default
Install it to /opt/java
Set environment variable: JAVA_HOME=/opt/java
- Mac users: JAVA_HOME=/Library/Java/Home
- Windows users default: JAVA_HOME=C:\j2sdk1.5.0_xx (where "xx" is the minor version - for example "j2sdk1.5.0_06")
Add $JAVA_HOME/bin to PATH
Set JAVA_OPTS for tomcat in the tomcat/bin/setenv file (see Install Tomcat 5.5)
```
JAVA_OPTS='-server -Xms384m -Xmx768m -XX:NewSize=192m -XX:MaxNewSize=384m 
   -XX:PermSize=96m -XX:MaxPermSize=160m -Djava.awt.headless=true'
```
- These settings are for developers
- More info on JVM tuning: Sakai 2.2 developer JVM tuning