Thread: application that determines and prints the number of odd, even, and zero digits

my code will not read zero's when they are in the number. Please help

import java.util.Scanner;
public class oddevenzero {
	public static void main (String[] args){
 
	int numofOdd = 0, numofEven = 0, numofZero = 0, length, left = 0;
		String num;
	Scanner scan = new Scanner (System.in); //instantiate Scanner object
 
	System.out.println ("This program will tell you how many even, odd, and zeros are in an integer: "); 
	System.out.println("Enter a integer: "); 
		num = scan.next(); 
	System.out.println(""); 
 
	length=num.length();
 
	while (left < length){
 
		num.charAt(left);
 
			if (num.charAt(left) == 0)
				numofZero = numofZero + 1;
			else if (num.charAt(left)%2 == 0)
				numofEven = numofEven + 1;
			else
				numofOdd = numofOdd + 1;
 
			left = left +1; }
 
	System.out.println ("Even Digits: " + numofEven);
	System.out.println ("Odd Digits: " + numofOdd);
	System.out.println ("Zero Digits: " + numofZero);
 
	}
}