从键盘上输入身份证号, 判断出生日期,性别

//从键盘上输入身份证号, 判断出生日期,性别(倒数第二位是奇数表示男,偶数代表女)
public class IdNumber {
    public static void main(String[] args) {
        //1.键盘输入身份证号
        Scanner intput = new Scanner(System.in);
        System.out.println("请输入身份证号码");
        String idNum = intput.next();
        //定义身份证模式规范
        String s = "1[2-9]\\d{15}\\w";
        System.out.println(idNum.matches(s));
        //判断出生日期

        dateOfBirth(idNum);

        //判断性别
        judgeSex(idNum);

    }

    private static void judgeSex(String idNum) {
        String sex = idNum.substring(16, 17);
        //调用Integer.parseInt方法将字符串转换为整数
        int a = Integer.parseInt(sex);

        if (a % 2 == 0) {
            sex = "女";
        } else {
            sex = "男";
        }
        System.out.println("性别是：" + sex);
    }

    private static void dateOfBirth(String idNum) {
        String year = idNum.substring(6, 10);
        String month = idNum.substring(10, 12);
        String day = idNum.substring(12, 14);
        System.out.println("出生日期是：" + year + "年" + month + "月" + day + "日");
    }
}