How do I update JAVA_HOME / JRE_HOME on Tomcat on Ubuntu 15.04?

Question

I'm trying to set my JRE_HOME variable in catalina.bat to be where my java is stored (/usr/lib/jvm/default-java) in Ubuntu. I edited catalina.bat and added "set JAVA_HOME=/usr/lib/jvm/default-java" at the very top of the file but when I use "./catalina.sh version" it keeps stating "Using JRE_HOME: /usr". How do I setup my catalina.bat file so that the JRE_HOME will update?

I've tried a few older guides for older versions of Ubuntu but nothing has worked. Any and all help is appreciated I just want to get my computer working for java server side programming. Thanks in advance.

Answer 1

When you starting tomcat using catalina.bat, it searching for file setenv.bat and sourcing it. It is searching in CATALINA_HOME or CATALINA_BASE

So the better way to set JAVA_HOME for the tomcat is:

Create setenv.bat script CATALINA_BASE/bin, if it is not exists already. Add this line to setenv.bat

export JAVA_HOME=/opt/java/jdk1.8.0_05

Make it executable.