java：如何将值元素放入哈希图值数组？

Question

I was trying to put the int result after rolling a dice into the value of a hashmap. IDE shows error on this line:

map.put(1, diceRoll);

its explaination is:

The method put(Integer, ArrayList<Integer>[]) in the type Map<Integer,ArrayList<Integer>[]> is not applicable for the arguments (int, ArrayList<Integer>)

My code is:

Map<Integer, ArrayList<Integer>[]> map = new HashMap<Integer, ArrayList<Integer>[]>();
ArrayList<Integer> diceRoll= new ArrayList<Integer>();
Dice dice = new Dice();
diceRoll.add(dice.getLastRoll());

map.put(1, diceRoll); 
ArrayList<Integer>[] integers = map.get(1);
System.out.print(integers[0]);

Thank you for the help

Answer 1

If you want to store a series of int s, you don't need an array of lists, just a list:

Map<Integer, List<Integer>> map = new HashMap<>();
List<Integer> diceRoll = new ArrayList<>();
Dice dice = new Dice();
diceRoll.add(dice.getLastRoll());

map.put(1, diceRoll);