Answer :

public static void main(String[] args) {
Scanner console = new Scanner(System.in);
int a = console.nextInt();
int b = console.nextInt();
    gcd (a, b);
} public static void gcd(int a, int b)
{
System.out.print("Type in two numbers and I will print outs its Greatest Common Divisor: ");
int gcdNum1 = console.nextInt();
int gcdNum2 = console.nextInt();
while (gcdNum1 == 0) { gcdNum1 = 0;
}
while (gcdNum2 > gcdNum1)
{
int gcd = gcdNum1 % gcdNum2;
}
System.out.print(gcdNum1 + gcdNum2);
}