public class Demo {
    public static void main(String args[]) {
        // matrix will contain generated odd and even integers
        int matrix[][] = new int[2][];
        for (int i=0;i<2;i++) {
            // populating odd / even integer array
            int tmpArray[] = new int[5];
            for (int j=0;j<tmpArray.length;j++) {
                tmpArray[j] = 2*(j+1) + 1*i;
            }
            matrix[i] = tmpArray;
        }

        int dummyIntArray[] = new int[1];
        dummyIntArray[0] = -1;

        // Get and print an integer stored in dummyIntArray.
        int myInt = dummyIntArray[0];
        System.out.println("Dummy Integer: " + myInt);

        // Get and print odd integers stored in matrix.
        Object oddIntegersObj = matrix[1];
        printIntegerArray("Odd Integers:", (int [])oddIntegersObj);

        // Get and print even integers stored in matrix.
        Object evenIntegersObj = matrix[0];
        printIntegerArray("Even Integers:", (int [])evenIntegersObj);
    }

    private static void printIntegerArray(String text, int array[]) {
        if (array != null) {
            System.out.println(text);
            for (int j=0;j<array.length;j++) {
                System.out.print(array[j] + " ");
            }
            System.out.println();
        }
    }
}