Question

How do you declare an ArrayList containing room elements in Java?

a. The array has 3 sets of 5 rows with each row containing 8 elements.
b. The array has 2 sets of 6 rows with each row containing 10 elements.
c. The array has 4 sets of 4 rows with each row containing 6 elements.
d. The array has 5 sets of 3 rows with each row containing 7 elements.

Answer 1

To declare an ArrayList containing room elements in Java, you can create an ArrayList of ArrayLists. Each inner ArrayList represents a row and the outer ArrayList contains the rows.

Step-by-step explanation:

To declare an ArrayList containing room elements in Java, you can create an ArrayList of ArrayLists. Each inner ArrayList represents a row and the outer ArrayList contains the rows. Here is an example:

ArrayList<ArrayList<String>> rooms = new ArrayList<>();
ArrayList<String> row1 = new ArrayList<>();
row1.add("element1");
row1.add("element2");
row1.add("element3");
...
rooms.add(row1);
...
ArrayList<String> rowN = new ArrayList<>();
rowN.add("element1");
rowN.add("element2");
rowN.add("element3");
...
rooms.add(rowN);