求个大神帮我解决一下，C币好说，很急

// String birth = "2000-08-05";
String birth = "2000-09-15";
String today = "2011-09-12";
SimpleDateFormat ageFormat = new SimpleDateFormat("yyyy-MM-dd");

 try {
    Date birthDayD = ageFormat.parse(birth);
    Date todayD = ageFormat.parse(today);

    int birthYear = birthDayD.getYear();
    int birthMonth = birthDayD.getMonth();
    int birthDay = birthDayD.getDay();

    int todayYear = todayD.getYear();
    int todayMonth = todayD.getMonth();
    int todayDay = todayD.getDay();

    int age = todayYear - birthYear;

    if(todayMonth - birthMonth < 0){
    age = age - 1;
    } else if(todayMonth - birthMonth == 0){
    if(todayDay - birthDay < 0){
        age = age - 1;
    }
    }
    System.out.println("age=" + age);
} catch (ParseException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

public static void main(String []args){
// String birth = "2000-08-05";
String birth = "2000-09-15";
test(birth);
}
public int test(birth){
String today = "2011-09-12";
SimpleDateFormat ageFormat = new SimpleDateFormat("yyyy-MM-dd");

try {
Date birthDayD = ageFormat.parse(birth);
Date todayD = ageFormat.parse(today);

int birthYear = birthDayD.getYear();
int birthMonth = birthDayD.getMonth();
int birthDay = birthDayD.getDay();

int todayYear = todayD.getYear();
int todayMonth = todayD.getMonth();
int todayDay = todayD.getDay();

int age = todayYear - birthYear;

if(todayMonth - birthMonth < 0){
age = age - 1;
} else if(todayMonth - birthMonth == 0){
if(todayDay - birthDay < 0){
    age = age - 1;
}
}
System.out.println("age=" + age);
    return age;

} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}