The declaration ArrayList<ArrayList<>> = new ArrayList<><>(); is not correct in Java. When declaring generic types, you need to specify the type parameter for both the outer and inner ArrayList.

Create a 2D integer array (5x5) and inseart numbers (use the "counter ... You will need to reuse the counter (reinitialize it to equal 1) and an integer ArrayList. A. Using the counter andd 10-15 ...