JAva年齢の計算

(1991010)のような文字列に出入りするだけで、次の方法を呼び出すと、現在の年齢を計算できます.

 1 //     
 2     public static int getage(String date1) throws ParseException {
 3         int age = 0;
 4         if (!("".equals(date1))) {
 5             SimpleDateFormat myFormat = new SimpleDateFormat("yyyy-MM-dd");
 6             long leapYear = (long) getLY(date1);
 7             Date birthDate = myFormat.parse(date1);
 8             Date nowdate = new Date();
 9             Date Date = myFormat.parse(myFormat.format(nowdate));
10             age = (int) (((Date.getTime() - birthDate.getTime())
11                     / (24 * 60 * 60 * 1000) - leapYear) / 365);
12         }
13         return age;
14     }
15 
16     //         
17     public static int getLY(String data) {
18         int leapYear = 0;
19         if (!("".equals(data))) {
20             SimpleDateFormat myFormat = new SimpleDateFormat("yyyy");
21             Date date = new Date();
22             int birthYear = Integer.parseInt(data.substring(0, 4)); //       ，   Date  
23             int currYear = Integer.parseInt(myFormat.format(date)); //       
24             for (int year = birthYear; year <= currYear; year++) {
25                 if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {
26                     leapYear++; //         ，      +1
27                 }
28             }
29         }
30         return leapYear;
31     }