java program code

class FindFibonacciAndFactorial 
{
    public static void fibonacciSeries(){
    int f1=0,f2=0,f3=1;
    for(int i=1;i<=5;i++){
        System.out.println(f3);
        f1=f2;
        f2=f3;
        f3=f1+f2;
    }
    }
    public static int findFactorial(int n)
    {
        if (n == 1) {
            return n;
        }
        else {
            return n * findFactorial(n-1);
        }
    }
    public static void main(String[] args) 
    {
    fibonacciSeries();
    System.out.println(findFactorial(5));
    }
}

the program has to display user input and if any has to show any arror message thank atherwise for the information you give me big thanks.