how to output sum of odd numbers in java between two integers

/**
 * @author lautturi.com
 * Java example:get sum of odd numbers between two integers in java
 */

import java.util.*;

public class Lautturi {

	public static void main(String[] args) {

		int firstNum = 30;
		int secondNum = 20;
		if (firstNum > secondNum) {
			int temp = secondNum;
			secondNum = firstNum;
			firstNum = temp;
		}
		int oriFirstNum = firstNum;
		int oriSecondNum = secondNum;
		
		System.out.print("Odd Numbers: ");
		secondNum++;
		while (secondNum > firstNum) {
			if (firstNum % 2 != 0) {
				System.out.print(" " + firstNum);
			}
			firstNum++;
		}

		int sum = 0;
		firstNum = oriFirstNum;
		secondNum = oriSecondNum;
		
		System.out.println();
		System.out.print("Sum of Even Numbers: ");
		secondNum++;
		while (secondNum > firstNum) {
			if (firstNum % 2 != 0) {
				sum++;
			}
			firstNum++;
		}
		System.out.println(sum);
	}
}

output:

Odd Numbers:  21 23 25 27 29
Sum of Odd Numbers: 5