Java分割数组成子数组

 

我有一个 2000多长度的数组，我要分割成40个50长度的子数组，怎么实现 ？

问题补充：

我需要的结果是这样的：
把这个数组 int[] sum = {0,1,2,3,4,5,……,18};
分成
 int[] a = {0,1,2,3,4}; //长度5
 int[] b = {5,6,7,8,9}; //长度5
 int[] c = {10,11,12,13,14}; //长度5
 int[] d = {15,16,17,18}; //长度4

import java.util.ArrayList;
import java.util.List;

public class ABC {

 public static void main(String[] args) {

  int[] ary = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18};//要分割的数组
  int splitSize = 5;//分割的块大小
    
   Object[] subAry = splitAry(ary, splitSize);//分割后的子块数组
   
  for(Object obj: subAry){//打印输出结果
   
   int[] aryItem = (int[]) obj;
   
   for(int i = 0; i < aryItem.length; i++){
    System.out.print(aryItem[i] + ", ");
   }
   System.out.println();
  }


 }

 private static Object[] splitAry(int[] ary, int subSize) {
  int count = ary.length % subSize == 0 ? ary.length / subSize: ary.length / subSize + 1;

  List<List<Integer>> subAryList = new ArrayList<List<Integer>>();

  for (int i = 0; i < count; i++) {
   int index = i * subSize;
   
   List<Integer> list = new ArrayList<Integer>();
   int j = 0;
   while (j < subSize && index < ary.length) {
    list.add(ary[index++]);
    j++;
   }

   subAryList.add(list);
  }
  
  Object[] subAry = new Object[subAryList.size()];
  
  for(int i = 0; i < subAryList.size(); i++){
   List<Integer> subList = subAryList.get(i);
   
   int[] subAryItem = new int[subList.size()];
   for(int j = 0; j < subList.size(); j++){
    subAryItem[j] = subList.get(j).intValue();
   }
   
   subAry[i] = subAryItem;
  }
  
  return subAry;
 }
}

------------------ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,