how to use (String [] [] args) in java [closed]

Answer 1

This is a example program that creates a 2d array (called matrix):

public static void main(String[] args) throws Exception {

    // will initialize the matrix with null references
    String[][] matrix = new String[4][3];

    // fill it with some values
    for (int i = 0; i < matrix.length; i++) 
        for (int j = 0; j < matrix[0].length; j++)
            matrix[i][j] = "Hello";

    // set a specific matrix element
    matrix[1][1] = "World";

    // print it
    for (int i = 0; i < matrix.length; i++) 
        System.out.println(Arrays.toString(matrix[i]));
}

It will print:

[Hello, Hello, Hello]
[Hello, World, Hello]
[Hello, Hello, Hello]