Marine Power 1.6 Problems

I just joined Mpgh.net and I went straight to RotMg hacks I knew what MarinePower1.6 was so I downloaded it,and I needed some help using it because whenever I start it for some reason the type of the file is Executable Jar File. Is that right when I run Runner It says Java is not recognized as an external or internal command. Can someone Help me fix this

read the 10,000 other posts with the exact same problem

You need to go to ur host" and put the host files for rotmg in there no one listens/watches the video their just thirsty for hacks...