BlackJack BlackJack - 1 year ago 103
Java Question

Insert int Array to ArrayList

Can I insert array to array and read it afterwards in Java? Something like this:

ArrayList<Integer> array = new ArrayList<>();


{ [1,4,5], [3,7,2] }

And read like:

print(array[0][1]); //prints 4


Answer Source

You could write ArrayList<int[]> and pass values like .add(new int[]{...}).

For example,

List<int[]> list = new ArrayList<>();
list.add(new int[]{1, 2, 3});

To print values out you should get int[] firstly by get(int index) and by [] get a value from the array:

System.out.print(list.get(0)[0]); // 1
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