3 Row 1, column 2 holds the value i + j = 1 + 2 = 3.

Traversing ArrayLists

AP Computer Science A· difficulty 4/5

ArrayList<ArrayList<Integer>> grid = new ArrayList<>();
for (int i = 0; i < 3; i++) {
    ArrayList<Integer> row = new ArrayList<>();
    for (int j = 0; j < 3; j++) row.add(i + j);
    grid.add(row);
}
System.out.println(grid.get(1).get(2));

What is printed?

A
$2$
B
$3$
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C
$4$
D
$1$

Explanation

Row 1, column 2 holds the value i + j = 1 + 2 = 3.

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