How do I declare a 2D String arraylist?
arraylist, arrays, java
Solution
You can go with
List<List<String>> ls2d = new ArrayList<List<String>>();
List<String> x = new ArrayList<String>();
x.add("Hello");
x.add("world!");
ls2d.add(x);
System.out.println(Arrays.deepToString(ls2d.toArray()));
Problem
I want to do something like this `ArrayList<String<String>> mylist` How can I create it? How can I add to the external and internal list and how can I convert the internal list to a simple array list?