根据用户输入将 ArrayList 拆分为多个 ArrayList [英] Split ArrayList into Multiple ArrayLists depending on user input

问题描述

我有这个程序:

public static void main(String[] args){
    System.out.println("Enter number of nodes");
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    for(int i=0;i<=n;i++)
    {
        nodes.add(i);
    }

    System.out.println(nodes);
    System.out.println("How many subnetworks you want? Enter Small(10), Med(30), Large(50)");
    small = sc.nextInt();
    med = sc.nextInt();
    large = sc.nextInt();
    System.out.println("Small = " + small + "med" + med + "large" + large);

现在根据 small、medium 和 large 的值并考虑每个整数的倍数，我想将 ArrayList 拆分为不同的数组列表或数组.例如，small = 100, med = 50, large = 10 应该将主数组列表拆分为 100 个大小为 10 的小数组列表、50 个大小为 30 的 med 数组列表和 10 个大小为 50 的大数组列表.拆分后，我想为 sublsits 中的元素分配一些属性.而且我不确定它是否应该是 arraylist 或 array 或其他任何东西.

Now depending on value of small, medium and large and considering multiples of each of these integers, I want to split ArrayList into different arraylists or array. For example, small = 100, med = 50, large = 10 should split main arraylist into 100 small arraylists each of size 10, 50 med arraylists each of size 30 and 10 large arraylists each of size 50. After the split, I want to assign some properties to elements in sublsits. And I am not sure whether it should be arraylist or array or anything else.

推荐答案

可以使用拆分列表功能.

You can use split list function.

private static List<List<Integer>> splitAndReturn(List<Integer> numbers,
        int size) {
    List<List<Integer>> smallList = new ArrayList<List<Integer>>();
    int i = 0;
    while (i + size < numbers.size()) {
        smallList.add(numbers.subList(i, i + size));
        i = i + size;
    }
    smallList.add(numbers.subList(i, numbers.size()));
    return smallList;
}

该函数将返回一个数组的arrayList，每个原始大小为size.因此，如果您需要 100 个大小为 10 的数组，则

The function will return an arrayList of arrays with each raw of size size. So if you need 100 array with size 10, then

splitAndReturn(yourList, 10).subList(0, 100);

会给你数组列表.

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