Games issue in Samsung mobile!!

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Well, recently I bought a new cellphone of Samsung Star Wi-FI model number GT -S5233W and it is having a really nice appearance , very stylish piece. It has big screen for playing movies and also vista like system for using widgets. But just one thing which I saw missing was the games installation thing. Earlier when I had a sony ericsson mobile I used to search games with jar file which I used to copy in the other files folder in the mobile memory through the pc via the data cable. And it use to install the game into the mobile by clicking it. But the same doesn't work with Samsung mobile since like sony ericsson it is also java supported but when I clicked the jar file of game installation, it showed unsupported file. Does anybody knows how to install games in Samsung mobile or for being specific, in Samsung Star Wi--Fi cellphone?