Convert from base-7 to decimal

import java.util.Scanner;

public class ConvertFromBase7ToDecimal {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int n = input.nextInt();
        int fromBase = 7;
        int toBase = 10;
        System.out.println(fromBaseToBase(n, fromBase, toBase));
    }

    public static String fromBaseToBase(int number, int fromBase, int toBase){
        String numStr = Integer.toString(number);
        try {
            return Integer.toString(Integer.parseInt(numStr, fromBase), toBase);
        }catch (Exception ex){
            return "Invalid Entry!";
        }
    }
}