org apache activemq ActiveMQConnectionFactory Unsupported major minor version 51 0

org apache activemq ActiveMQConnectionFactory Unsupported major minor version 51 0

If you are using Apache ActiveMQ version 5.11.1 with its client and getting below exception:

Exception in thread “main” java.lang.UnsupportedClassVersionError: org/apache/activemq/ActiveMQConnectionFactory : Unsupported major.minor version 51.0

Exception in thread "main" java.lang.UnsupportedClassVersionError: org/apache/activemq/ActiveMQConnectionFactory : Unsupported major.minor version 51.0
	at java.lang.ClassLoader.defineClass1(Native Method)
	at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
	at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
	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)
	at com.javahonk.ActiveMQHelloWorld.main(ActiveMQHelloWorld.java:20)

Solution: Apache Active 5.11.1 has been compile with JDK 7 so minor major version issue occurs if it JDK version does not match. Change your project compiler to JDK 7.