How do i get 30 values from the list every time using java.

Hi Experts,

I have a list having values
from the list i want to display an average of 30 values
like let suppose
list having 100 values i want to display 3,6,9,.....up to 30 values
is it possible to get 30 values out of list size?

list size i am not sure how much it is?

list size is 100-->30( i need 30 values from the list)

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Something like the following maybe?

int listSize = list.size();
int stepSize = listSize / 30;
for(int i = 0;i<listSize;i+=stepSize) {
  Object o = list.get(i);

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