2D Arrays in AP Computer Science A

arrayG[3][2]

arrayG[1][2]

arrayG[2][1]

arrayG[2][3]

IllegalArgumentException

ArithmeticException

ArrayIndexOutOfBoundsException

NullPointerException

The length of the inner array represents the number of columns.

2D arrays cannot have varying sizes for their inner arrays.

2D arrays are always pre-initialized with values.

All 2D arrays have the same number of rows and columns.

The inner arrays within a 2D array can vary in size.

The length of the outer array represents the number of columns.

2D arrays can only store integers.

2D arrays are always rectangular in shape.

The row indices of a 2D array range from 0 to firstDimension - 1.

A 2D array can have varying sizes for its inner arrays.

Java uses single-index notation to access elements in a 2D array.

The column indices of a 2D array range from 0 to secondDimension - 1.

int arrayB[3][4] = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}};

int[][] arrayB = new int[3][4];

int[][] arrayB = new int{{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}};

int[][] arrayB = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10, 11, 12}};

Indices of the 2D array.

Columns of the 2D array.

Elements of the 2D array.

Rows of the 2D array.

3

2

4

6

2D arrays are always rectangular in shape.

The length of the outer array represents the number of columns.

2D arrays can only store integers.

The inner arrays within a 2D array can vary in size.

String[2][3] arrayC = new String[][];

String arrayD[2][3] = new String[][];

String[][] arrayA = new String[2][3];

String[][] arrayB = new String[][]{{}, {}};