[Java]Get Week of the Month

import java.util.Calendar;

class Main {   
   public static void main(String[] args) {
       Calendar cal = Calendar.getInstance();
       //Java 中月 1 - 12 月,分別對應是 0 - 11
       //設定目前日期為 2000/02/01(29天)
       //cal.set(2000, 1, 1);
       System.out.println("現在的時間: " + cal.getTime());
       System.out.println("本月共有  : " + cal.getActualMaximum(Calendar.WEEK_OF_MONTH) + "  週");
       int date_Count = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
       //Java 中星期 日、一、二、三、四、五、六,分別對應是 1 - 7
       if ((cal.get(Calendar.DAY_OF_WEEK)) == 1) {
           System.out.println("今天星期天");
       } else if ((cal.get(Calendar.DAY_OF_WEEK)) == 2) {
           System.out.println("今天星期一");
       } else if ((cal.get(Calendar.DAY_OF_WEEK)) == 3) {
           System.out.println("今天星期二");
       } else if ((cal.get(Calendar.DAY_OF_WEEK)) == 4) {
           System.out.println("今天星期三");
       } else if ((cal.get(Calendar.DAY_OF_WEEK)) == 5) {
           System.out.println("今天星期四");
       } else if ((cal.get(Calendar.DAY_OF_WEEK)) == 6) {
           System.out.println("今天星期五");
       } else if ((cal.get(Calendar.DAY_OF_WEEK)) == 7) {
           System.out.println("今天星期六");
       }
   }
}