How to write user input 2D array?

Question

I am new to java. Trying to make this into a user input 2D array which is 4*4. But when I try scanner, the row and col always got messed up.

public static void main(String[] args) {
        String array = "1 2 2 1,1 3 3 1,1 3 3 2,2 2 2 2"; 
        int[][] input = parseInt(array, 4, 4);
}

And I also want the user input can output as:

Appreciate for everybody's help!

Possible duplicate of trying to fill a 2D array by user-input how to do it? — MSD
– MSD, Commented Mar 31, 2017 at 4:27

kourouma_coder · Accepted Answer · 2017-03-31 04:52:51Z

2

Try this one :

 public static void main(String args[]) {

    String array = "1 2 2 1,1 3 3 1,1 3 3 2,2 2 2 2";
    int[][] input = new int[4][4];//4*4 
    String[] inputs = array.split(",");
    for (int i = 0; i < inputs.length; i++) {
        String[] cols = inputs[i].split(" ");
        for (int j = 0; j < cols.length; j++) {
            input[i][j] = Integer.parseInt(cols[j]);
            System.out.print(input[i][j]);
            System.out.print(" ");// for spacing
        }

        System.out.println();

    }
}

Output :

answered Mar 31, 2017 at 4:52

kourouma_coder

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9spl · Accepted Answer · 2017-03-31 04:42:03Z

-1

Use following method to convert array String in 2D array.

int[][] parseInt(String array, int row, int col) {
    int[][] arr = new int[row][col];

    String[] rowStr = array.split(",");

    for (int i = 0; i < rowStr.length; i++) {
        String[] colStr = rowStr[i].split(" ");
        for (int j = 0; j < colStr.length; j++) {
            arr[i][j] = Integer.parseInt(colStr[j]);
        }
    }
    return arr;
}

answered Mar 31, 2017 at 4:42

9spl

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