creating a 2d array from a String

Question

I am trying to create a 2d array from a String. But i am getting some weird results when i try to set the value of elements in the array. Here String s = 120453678;

public int[][] create2D(String s){
    int[][] puzzle = new int[3][3];
    int a;

    for(int i = 0; i < 3; i++){
        for(int j = 0; j < 3; j++){

            puzzle[i][j] = (int)s.charAt(i*3+j);
            System.out.println(s.charAt(i*3+j));                
            System.out.println(i +"  "+ j+"  "+ puzzle[i][j]);
        }
    }

    return puzzle;      

}

The output i am getting is. Don't know why its 49, 50 , 51 and so on

A character like '3' is represented as the "integer" value 51. Google ASCII code, and so on. — laune
– laune, Commented Aug 5, 2015 at 4:40

Aakash · Accepted Answer · 2015-08-05 04:48:22Z

2

You are converting the character to it's int representation. That's why you are getting this result.

puzzle[i][j] = (int)s.charAt(i*3+j);

ASCII table can be referred below. You can see that 49 is ASCII value of character '1'.

http://www.asciitable.com/

To fix your code, you can use

puzzle[i][j] = Character.getNumericValue(s.charAt(i*3+j));

edited Aug 5, 2015 at 4:48

answered Aug 5, 2015 at 4:39

Aakash

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