時間日期

  
public class GregorianCalendarDemo {

   public static void main(String args[]) {
      String months[] = {
      "Jan", "Feb", "Mar", "Apr",
      "May", "Jun", "Jul", "Aug",
      "Sep", "Oct", "Nov", "Dec"};
      
      int year;
      // 初始化 Gregorian 日曆
      // 使用當前時間和日期
      // 默認爲本地時間和時區
      GregorianCalendar gcalendar = new GregorianCalendar();
      // 顯示當前時間和日期的信息
      System.out.print("Date: ");
      System.out.print(months[gcalendar.get(Calendar.MONTH)]);
      System.out.print(" " + gcalendar.get(Calendar.DATE) + " ");
      System.out.println(year = gcalendar.get(Calendar.YEAR));
      System.out.print("Time: ");
      System.out.print(gcalendar.get(Calendar.HOUR) + ":");
      System.out.print(gcalendar.get(Calendar.MINUTE) + ":");
      System.out.println(gcalendar.get(Calendar.SECOND));
      
      // 測試當前年份是否爲閏年
      if(gcalendar.isLeapYear(year)) {
         System.out.println("當前年份是閏年");
      }
      else {
         System.out.println("當前年份不是閏年");
      }
   }
}