how to call linux command with java ?

hi list, I wanna make java application which call linux command, but I don't know how to call linux command. For example : I wanna display the output of "ps -ax" command in applet. Please, I need some help here. Thx a lot ===== Linux Aremania __________________________________________________ Do you Yahoo!? The New Yahoo! Search - Faster. Easier. Bingo http://search.yahoo.com