Java ArrayList分頁__Java

今天遇到一個問題，需要把資料先取到記憶體中，再進行分頁操作返回指定頁碼的資料。記錄一下通過subList方法來返回資料：

import java.util.ArrayList;import java.util.List;/** * Create by zxb on 2017/5/10 */public class SubListTest {    public static void main(String[] args) throws ClassNotFoundException {        List<Integer> list = new ArrayList<>();        for (int i = 0; i < 22; i++) {            list.add(i);        }        int pageNo = 2;   //從1開始        int pageSize = 15;        int fromIndex = pageSize * (pageNo - 1);        int toIndex = pageSize * pageNo;        if (toIndex > list.size()) {            toIndex = list.size();        }        if (fromIndex > toIndex) {            fromIndex = toIndex;        }        System.out.println(fromIndex+","+toIndex);  //15,22        System.out.println(list.subList(fromIndex, toIndex));  //[15, 16, 17, 18, 19, 20, 21]    }}