如何在一行中用0初始化2d ArrayList

Question

How to Initialize all the element of 2d Array List in Java with 0 in single line of code without using for lop.

ArrayList of m rows and n columns.

How to initialise value of all the elements to 0 at the time of defining it.

Answer 1

Not sure what you meant by 2D ArrayList, but you returned type of List instead of ArrayList with help of below:

List<List<Integer>> a=Arrays.asList(Arrays.asList(0));

For normal arrays you can do something:

int[][] b=new int[1][2];