title: how to make .jar file in Eclipse MARS
body: <p>I'm learning Hadoop under VMware now.(win7, 64) Due to some reason, I can't convert a .java file to .jar file under virtual machine, so I tried to create .jar file under Eclipse.</p>
  
  <p>I'm currently using Eclipse MARS(4.5.1). I need to download something about fat jar, but I can't find it online.</p>
  
  <p>My colleague copied his Eclipse software to me. It is already installed, so I copied the whole package. It is Eclipse Kepler. So I am running two Eclipse software on my computer now. will this cause some problem? (I saved projects seperately)</p>
  
  <p>I can do the convert .jar file thing correctly on Eclipse Kepler now. But I still want to use MARS and delete the extra Eclipse.</p>
  
  <p>thank you ! </p>