public static void main(String[] args) {
        int count = 1000;
        int index = 0;
        List<Integer> list = new ArrayList<Integer>();
        for (int i = 0; i < count; i++) {
            list.add(i+1);
        }
        for (int i = 0; i < 20; i++) {
            List<Integer> temp = list.subList(index, index+count/20);
            index += count/20;
            System.out.println("the data of list " + (i + 1) + "===========>");
            for (int j = 0; j < temp.size(); j++) {
                System.out.println(temp.get(j));
            }
        }
    }

------解决方案--------------------

Java code

List<Integer> list=new ArrayList<Integer>();
        for(int i=1;i<1001;i++)
            list.add(i);
        int count=list.size()/20;
        for(int i=0;i<20;i++){
            List<Integer> subList= list.subList(i*count,count*(i+1));
            System.out.println(subList);
        }