JAVA

Double matrix

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();
        }
    }
}