java将数组切分为指定长度的多个数组

private  List> splitArr(String[] array, int num) {
		int count = array.length % num == 0 ? array.length / num : array.length / num + 1;
		List> arrayList = new ArrayList<>();
 		for(int i=0;i list = new ArrayList<>();
			int j = 0;
			while(j < num && index < array.length) {
				list.add(array[index++]);
				j++;
			}
			arrayList.add(list);
		}
		return arrayList;
}

String s = "1,2,3,4,5,6,7,8,9,10,11,12,13";
String[] array = s.split(",");
System.out.println(Arrays.toString(array));
int num = 4;
List> arrayList = splitArr(array, num);
for(List list : arrayList) {
	System.out.println(Arrays.toString(list.toArray()));
}

执行结果：