i'm just start learning java for the past 6 month and i'm interesting in J2EE..I got 2 question & my question is : for example i've created a LocalSessionBean : public long calCulate(long x, long y){ x + y = long g; return g; } if 1000 users access that bean and give different different value of x and y, did all the user got different value of g? for the 2nd question: what the different between sessionbean and cookies? I'm doing a lot of reserch about this but i can't understand it, for the expert out there..please help me.. thanks, Ibrahim

Yes, all users will get a unique value of 'g' as per their input. Here I am assuming that 'g' is not a variable of your SessionBean. SessionBean contain the business logic to be executed inside application server and Cookies are used to store information on client side.

thanks for the explaination but i need another explaination on web app. I've trying to develope Enterprise Aplication in netbeans, in the sample application there are client app, do i really need to create the client app in my project and what that client app does? thanks, Ibrahim