Как заполнить двумерный массив в java?

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int[][] arr = new int[3][3];
arr[0][0] = 1;
arr[0][1] = 2;
arr[0][2] = 3;
arr[1][0] = 4;
arr[1][1] = 5;
arr[1][2] = 6;
arr[2][0] = 7;
arr[2][1] = 8;
arr[2][2] = 9;

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int[][] arr = new int[3][3];
int value = 1;
for (int i = 0; i < arr.length; i++) {
    for (int j = 0; j < arr[i].length; j++) {
        arr[i][j] = value;
        value++;
    }
}

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import java.util.Scanner;

int[][] arr = new int[3][3];
Scanner scanner = new Scanner(System.in);
for (int i = 0; i < arr.length; i++) {
    for (int j = 0; j < arr[i].length; j++) {
        System.out.print("Введите значение для [" + i + "][" + j + "]: ");
        arr[i][j] = scanner.nextInt();
    }
}
scanner.close();