Project eluler problem 2 Even Fibonacci numbers

projecteuler2.java

package euler;

/**
 * @author <a href="http://i88.ca">http://i88.ca</a> 
 * 
 */
public class P2 {

	public static void main(String[] args) {
		int a = 1;
		int b = 1;
		int c = a + b;
		int sum = 0;
		while (c < 4000000) {
        // only c is even. a and b are always odd.  
			sum += c;
			a = b + c;
			b = c + a;
			c = a + b;
		}

		System.out.println(sum);

	}
}