Java: check if number belongs to Fibonacci sequence

I'm supposed to write a code which checks if a given number belongs to the Fibonacci sequence. After a few hours of hard work this is what i came up with:

public class TP2 {

    /**
     * @param args
     */

    public static boolean ehFibonacci(int n) {
        int fib1 = 0;
        int fib2 = 1;
        do {
            int saveFib1 = fib1;
            fib1 = fib2;
            fib2 = saveFib1 + fib2;
            }
        while (fib2 <= n);

        if (fib2 == n)
            return true;
        else
            return false;

    }
    public static void main(String[] args) {
        int n = 8;
        System.out.println(ehFibonacci(n));

    }
}

I must be doing something wrong, because it always returns "false". Any tips on how to fix this?

Solution 1:

You continue the loop while fib2 <= n, so when you are out of the loop, fib2 is always > n, and so it returns false.

Solution 2:

/**
 * @param args
 */

public static boolean ehFibonacci(int n) {
    int fib1 = 0;
    int fib2 = 1;
    do {
        int saveFib1 = fib1;
        fib1 = fib2;
        fib2 = saveFib1 + fib2;
        }
    while (fib2 < n);

    if (fib2 == n)
        return true;
    else
        return false;

}
public static void main(String[] args) {
    int n = 5;
    System.out.println(ehFibonacci(n));

}