public class DoubleMatrix { public static void main(String[] args) { int array[][] = { {1, 2, 3}, {4, 5, 6}, {7, 8, 9}, }; int n[][] = new int[3][3]; for (int i = 0; i < 3; i++) { for (int j = 0; j < 3; j++) { n[i][j] = array[i][j] * 2; System.out.print(n[i][j] + " "); } System.out.println(); } } }