how to play .jar games on LG CU515

I have the LG CU515. I have some pretty fantastic demo and trial versions of games on it. I recently downloaded some .jar games, put them on my micro SD card, popped it in my cellphone, and I can't play any of them. Anyone know any trick to getting these to work? All I get is a question mark next to the .jar game files on my memory card.

Thanks a bunch!

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.jar files are compressed files similar to .zip files.
You need to unpack them first. Then, there's the matter if your phone will even run a Java program. Probably not.