Multi-user examples of the use of JavaBeans and will not conflict

Multi-user examples of the use of JavaBeans and will not conflict?
I use first.jsp page

above , When users visit first.jsp example of a category known as the conn of the first object.
So my question to a more user at the same time to open this page, are examples of the same object, so many users at the same time in this Input parameters on the request of the page page request for the operation (for example, conn call it a way to get the return value), a multi-user operating at the same time, the results do not affect each other? Their example of a page Object is equal to a right ?? Still exist differences? So specific in what differentiated it?? In fact, this is what I javabean in the example of when the page was not enough to understand the mechanism of a thorough, prawns hope that they look at the help! ! !