How to insert a string into a 2D string array in Java?

Question

I\'m new to Java.

String[][] data = new String[][];
data[0][0] = \"Hello\";

This does not work, so can anyone explain why and how to make it wo

Answer 1

You have to specify the number of rows and columns of the array while declaring it:

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

This will initialize an array with 2 rows and 3 columns. In general:

String[][] data = new String[rows][columns];

You can also ommit the number of columns:

String[][] data = new String[2][];

but to be able to fill it, you will have to initialize each row separately:

String[][] data = new String[2][];
data[0] = new String[3];
data[1] = new String[3];