بليييييييييييييييز مساعده

ممكن تشرحو لي هذا الكود وكيف يطلع الرن

import java.util.*;
public class date
{
	private int hour,minute,month,year,day,Days,sec;
	private String Minute,Month,Day,AmPm,Year,Sec;
	public date()
	{
	GregorianCalendar now=new GregorianCalendar();
	hour=now.get(Calendar.HOUR_OF_DAY);
	minute=now.get(Calendar.MINUTE);
	Minute=String.valueOf(minute);
	sec=now.get(Calendar.SECOND);
	Sec=String.valueOf(sec);
	month=now.get(Calendar.MONTH);
	year=now.get(Calendar.YEAR);
	Year=String.valueOf(year);
	day=now.get(Calendar.DAY_OF_MONTH);
	Days=now.get(Calendar.DAY_OF_WEEK);
    }
    public String getdate()
    {
 	 switch (month){
 	 case 0:Month="Jan";break;
 	 case 1:Month="Feb";break;
 	 case 2:Month="Mar";break;
 	 case 3:Month="Apr";break;
 	 case 4:Month="May";break;
 	 case 5:Month="Jun";break;
 	 case 6:Month="Jul";break;
 	 case 7:Month="Aug";break;
 	 case 8:Month="Sep";break;
 	 case 9:Month="Oct";break;
 	 case 10:Month="Nov";break;
 	 case 11:Month="Dec";break;

 	 }
 	 switch(Days){
      case 1:Day="Sun";break;
 	 case 2:Day="Mon";break;
 	 case 3:Day="Tue";break;
 	 case 4:Day="Wed";break;
 	 case 5:Day="Thu";break;
 	 case 6:Day="Fri";break;
 	 case 7:Day="Sat";break;
    }
  return Day+" "+String.valueOf(day)+" "+Month+" "+Year;
	}
	public String gettime()
	{
  if(hour>12){hour=hour-12;AmPm="PM";}else{hour=hour;AmPm="AM";}
  if(minute<10){Minute="0"+Minute;}else{Minute=String.valueOf(minute);}
  if(sec<10){Sec="0"+Sec;}else{Sec=String.valueOf(sec);}
  return hour+":"+Minute+":"+Sec+" "+AmPm;
	}

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