Question

This gives error. Any other method to extract elements from a multi dimensional array one by one ?

I thought that for a foreach loop(variable holding corresponding value : array/Iterable), it is possible to first get the one dimensional array from a multiD. array and then create another foreach loop that extract elements from that array. But it gives all sorts of errors in foreach loop.

1st error: Array2D.java:14: error: not a statement
for(a : arr[] )

Code Behind:

class Array2D {
    public static void main(String[] args) {
        int[][] array = new int[][]
        {
                { 1, 2, 3 },
                { 4, 5, 6 },
                { 7, 8, 9 }
        };

        int a[] = new int[3];

        for(a : array) {
            for(int n : a) {
                System.out.print(n + " ");
            }
        }
    }
}

Answer 1

You need to change the first for statement. Also, you must move the int[] a declaration:

for(int[] a : arr) {
    ...
}