when filling a 2d array it gets null values

Issue

Im trying to initialise all the elements of the 2d array into a string "EMPTY". but When ever I try to initialise the array it gets null values. I checked errors in the for loop but couldn't see any

public static void arr_2d(){
    String [][] arr = new String[3][2];
    for (int i = 0; i < arr.length; i++) {
        for (int a = 0; a < arr[i].length; a++) {
            arr[i][a] = "EMPTY";
        }


        for (int b = 0; b < arr.length; b++) {
            for (int j = 0; j < arr[b].length; j++) {
                System.out.print(arr[b][j] + " ");
            }
            System.out.println();
        }
    }
}

Solution

Your loops are nested wrongly, which will result in the filling process not being complete while you're trying to process its results. You need

public static void arr_2d() {
    String[][] arr = new String[3][2];
    for (int i = 0; i < arr.length; i++) {
        for (int a = 0; a < arr[i].length; a++) {
            arr[i][a] = "EMPTY";
        }

    }
    for (int b = 0; b < arr.length; b++) {
        for (int j = 0; j < arr[b].length; j++) {
            System.out.print(arr[b][j] + " ");
        }
        System.out.println();
    }
}

Answered By - g00se