Faz a validação do TIA (Terminal Informativo do Aluno) do Mackenzie

TIAValidator.java

package com.validator;

/**
 * Faz a validação do TIA (Terminal Informativo do Aluno) do Mackenzie
 * @author gilson
 */
public class TIAValidator {

    private static final byte[] nums = {8, 7, 6, 5, 4, 3, 2};

    private TIAValidator() {}

    public static boolean validate(int tia) {
        int lastDigit = tia % 10;
        tia /= 10;
        int remainder;
        int sum = 0;
        int i = 6; //Iterate from right to left
        while (tia > 0) {
            remainder = tia % 10;
            sum += (remainder * nums[i--]);
            tia /= 10;
        }
        remainder = sum % 11;
        int calculatedDigit = (remainder <= 1) ? remainder : (11 - remainder);
        return calculatedDigit == lastDigit;
    }
}