HW5.24

 import java.util.Calendar;

 public class Solution
 {
     public static void main(String[] args)
     {
         System.out.println(getCurrentTime());
     }

     public static String getCurrentTime()
     {
         Calendar calendar = Calendar.getInstance();
         int year = calendar.get(Calendar.YEAR);
         int month = calendar.get(Calendar.MONTH);
         int date = calendar.get(Calendar.DATE);
         int hour = calendar.get(Calendar.HOUR_OF_DAY);
         int minute = calendar.get(Calendar.MINUTE);
         int second = calendar.get(Calendar.SECOND);

         return year + "-" + month + "-" + date + "  " + hour + ":" + minute + ":" + second;
     }
 }