EAP 7 requires Java version 1.8 or later (post-installation task would fail with older JDK). Installation should fail immediately if user doesn't use at least version 1.8.
Installer could use the same message as EAP does:
[pkremens@dhcp-10-40-5-125 bin] $ ./standalone.sh ========================================================================= JBoss Bootstrap Environment JBOSS_HOME: /home/pkremens/workspace/jboss-eap-7.0 JAVA: /usr/lib/java/jdk1.7.0_last/bin/java JAVA_OPTS: -server -verbose:gc -Xloggc:"/home/pkremens/workspace/jboss-eap-7.0/standalone/log/gc.log" -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=5 -XX:GCLogFileSize=3M -XX:-TraceClassUnloading -Xms1303m -Xmx1303m -Djava.net.preferIPv4Stack=true -Djboss.modules.system.pkgs=org.jboss.byteman -Djava.awt.headless=true ========================================================================= This application requires Java specification version 1.8 or later to run (this Java virtual machine implements specification version 1.7)