How to make ArrayList that work as two dimentional array in java?

Question

I want to make arrayList object in java that work as two dimentional array. My question is how can we access value from specific dimention from arrayList.

in two diment

Answer 1

List> list = new ArrayList>();
list.add(new ArrayList());
list.add(new ArrayList());
list.get(0).add(5);
list.get(1).add(6);

for(List listiter : list)
{
    for(Integer integer : listiter)
    {
        System.out.println("" + integer);
    }
}

This way you can get the items like

list.get(1).get(0); //second dimension list -> integer

EDIT:

Although it is true that you can use a Map if you are trying to use numeric indices for example for each list, like so:

Map> map = new HashMap>();
map.put(0, new ArrayList());
map.put(5, new ArrayList());
map.get(0).add(new YourObject("Hello"));
map.get(5).add(new YourObject("World"));

for(Integer integer : map.keySet())
{
    for(YourObject yourObject : map.get(integer))
    {
         yourObject.print(); //example method
         System.out.println(" ");
    }
}

Although even then the accessing of Lists would be the same as before,

map.get(0).get(1); //List -> value at index

Obviously you don't need to use Integers as the generic type parameter, that's just a placeholder type.