Actually I tried to install Apache Maven to my system.
I followed these steps:
Downloaded apache-maven-3.3.3 in my Window 8 machine and copied to Program Files.
Then added maven path C:\Program Files\apache-maven-3.3.3 as M2_HOME in system variable and added C:\Program Files\Java\jdk1.8.0_31 as JAVA_HOME.
Then added ;%M2_HOME%\bin to default Path.
Then tried to run as mvn -version in CMD.
But I got the result like:
