Install CheckStyle in Eclipse Indigo

Hi..i'm using platform ubuntu natty 11.04 and IDE eclipse indigo 3.7 and i'm trying install CheckStyle that the code created accordance with java code conventions..
how install CheckStyle??add following me..

Open your eclipse
Help -> Eclipse Marketplace

Your can fill "find" Checkstyle,after that wizard appears 

Your check and push button Next> 

check radio buttin I accept and push button finish
after that appears widget 

and restart..

Kemenyan 20:18 (waktu Insan Beriman)