Change Tomcat Address on my localhost

Have a look at item 4 of O'Reilly's Tomcat tips:

<Server port="8005" shutdown="SHUTDOWN" debug="0">
    <Service name="Tomcat-Standalone">
        <Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
                port="8080" minProcessors="5" maxProcessors="75"
                enableLookups="true" redirectPort="8443"/>
        <Connector className="org.apache.coyote.tomcat4.CoyoteConnector"
                port="8443" minProcessors="5" maxProcessors="75"
                acceptCount="10" debug="0" scheme="https" secure="true"/>
        <Factory className="org.apache.coyote.tomcat4.CoyoteServerSocketFactory"
                clientAuth="false" protocol="TLS" />
        </Connector>
        <Engine name="Standalone" defaultHost="localhost" debug="0">
        <!-- This Host is the default Host -->
        <Host name="localhost" debug="0" appBase="webapps"
            unpackWARs="true" autoDeploy="true">
            <Context path="" docBase="ROOT" debug="0"/>
            <Context path="/orders" docBase="/home/ian/orders" debug="0"
                        reloadable="true" crossContext="true">
            </Context>
        </Host>

        <!-- This Host is the first "Virtual Host": www.example.com -->
        <Host name="www.example.com" appBase="/home/example/webapp">
            <Context path="" docBase="."/>
        </Host>

        </Engine>
    </Service>
</Server>

The relevant part is where the virtual host is defined (in the last <Host> tag).