how to output sum of even numbers in java between two user values

1//import classes
2import java.util.*;
3
4public class chapter5no9
5{
6    static Scanner console = new Scanner(System.in);
7
8    public static void main(String[] args)
9    {
10
11    //Part A
12    int firstNum;
13    int secondNum;
14    int sumEven;
15
16    System.out.println("Please enter an integer: ");
17    firstNum = console.nextInt();
18
19    System.out.println("Please enter another integer less than the first integer: ");
20    secondNum = console.nextInt();
21
22    //Part B
23    if (firstNum < secondNum)
24    {
25        System.out.print("Your second number is greater than the first.  So Please re-enter: ");
26        secondNum = console.nextInt();
27    }
28    else
29    {
30        System.out.print("Odd Numbers: ");
31        firstNum++;
32        while (firstNum > secondNum)
33        {
34            if (secondNum % 2 != 0)
35            {
36                System.out.print(" " + secondNum);
37            }
38            secondNum++;
39        }
40
41        System.out.println();
42        System.out.print("Sum of Even Numbers: ");
43        firstNum++;
44        while (firstNum > secondNum)
45        {
46            if (secondNum % 2 != 0)
47            {
48                System.out.print(" " + secondNum);
49            }
50            secondNum++;
51        }
52    }
53}
54