如何从arraylist获得价值？

I am trying to fetch an url -where I am getting- and some values whohse I stored into two variables. I put those variables into an arrlist. Now I want to print out that array list on my jsp page. The restriction: I want print out tghe first 50 values at once and after some seconds seconds the next 100 values. But previous values should not display then next 50 value should display and privous not display at the end from starting value should display.I am trying to fetch an url -where I am getting