Cannot install Apache ActiveMQ on OS X 10.11.5 (El Capitan)

[Isuru-Nanayakkara]

I'm trying to do the first exercise. In order to do that, I'm installating Apache ActiveMQ. However when I run ./bin/activemq create ~/mobilewebmsg/mybroker command, I get a Unsupported major.minor version error. Full error message below.

INFO: Loading '/Users/Admin/Developer/Web/MQTT/apache-activemq-5.13.3//bin/env'
INFO: Using java '/System/Library/Frameworks/JavaVM.framework/Home/bin/java'
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/activemq/console/Main : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)

I installed the latest JDK 8 version. javac -version shows the installed version as javac 1.8.0_91.

How can I resolve this issue?