Hi everybody, I looked at the displaytag source code and realize some things (although I don't understand everything there): - when displaytag gets our list (the one specified in the 'name' attribute of display:table), it creates an iterator. when we go to a particular page, displaytag calculates the start and end postions of the rows that need to be displayed. For example, we are at page 9 and the page size is 10, then start = (9-1)*pagesize + 1 and end = start + pagesize. So, with an iterator, displaytag has only one choice to know which element in the iterator is at the start position. That choice is counting from the beginning of that iterator until we count to 'start". My question is 'why don't we use an ArrayList instead of an Iterator so that we can go to an element at any position directly?'. I created an example where my data (which have 2 columns, one is integer and one is string)contains 60710 rows. I notice that after I sorted by the string column, it took me a long time to go to the next page.
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