随笔档案

java.util.*;

public class ShowDate {

public static void main(String[] args) {
Calendar calendar = new GregorianCalendar();
Date trialTime = new Date();
calendar.setTime(trialTime);

// print out a bunch of interesting things
System.out.println("ERA: " + calendar.get(Calendar.ERA));
System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
System.out.println("DATE: " + calendar.get(Calendar.DATE));
System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
System.out.println("DAY_OF_WEEK_IN_MONTH: " + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));
System.out.println("HOUR: " + calendar.get(Calendar.HOUR));
System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));
System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));
System.out.println("SECOND: " + calendar.get(Calendar.SECOND));
System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));
System.out.println("ZONE_OFFSET: " + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000)));
System.out.println("DST_OFFSET: " + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000)));

System.out.println("Current Time, with hour reset to 3");
calendar.clear(Calendar.HOUR_OF_DAY); // so doesn't override
calendar.set(Calendar.HOUR, 3);
System.out.println("ERA: " + calendar.get(Calendar.ERA));
System.out.println("YEAR: " + calendar.get(Calendar.YEAR));
System.out.println("MONTH: " + calendar.get(Calendar.MONTH));
System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR));
System.out.println("WEEK_OF_MONTH: " + calendar.get(Calendar.WEEK_OF_MONTH));
System.out.println("DATE: " + calendar.get(Calendar.DATE));
System.out.println("DAY_OF_MONTH: " + calendar.get(Calendar.DAY_OF_MONTH));
System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR));
System.out.println("DAY_OF_WEEK: " + calendar.get(Calendar.DAY_OF_WEEK));
System.out.println("DAY_OF_WEEK_IN_MONTH: " + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
System.out.println("AM_PM: " + calendar.get(Calendar.AM_PM));
System.out.println("HOUR: " + calendar.get(Calendar.HOUR));
System.out.println("HOUR_OF_DAY: " + calendar.get(Calendar.HOUR_OF_DAY));
System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE));
System.out.println("SECOND: " + calendar.get(Calendar.SECOND));
System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND));
System.out.println("ZONE_OFFSET: " + (calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000))); // in hours
System.out.println("DST_OFFSET: " + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000))); // in hours
}

}


import java.text.DateFormat;
import java.util.*;

public class JspCalendar {
    Calendar  calendar = null;

    public JspCalendar() {
 calendar = Calendar.getInstance();
 Date trialTime = new Date();
 calendar.setTime(trialTime);
    }

    public int getYear() {
 return calendar.get(Calendar.YEAR);
    }
   
    public String getMonth() {
 int m = getMonthInt();
 String[] months = new String [] { "January", "February", "March",
     "April", "May", "June",
     "July", "August", "September",
     "October", "November", "December" };
 if (m > 12)
     return "Unknown to Man";
 
 return months[m - 1];

    }

    public String getDay() {
 int x = getDayOfWeek();
 String[] days = new String[] {"Sunday", "Monday", "Tuesday", "Wednesday",
          "Thursday", "Friday", "Saturday"};

 if (x > 7)
     return "Unknown to Man";

 return days[x - 1];

    }
   
    public int getMonthInt() {
 return 1 + calendar.get(Calendar.MONTH);
    }

    public String getDate() {
 return getMonthInt() + "/" + getDayOfMonth() + "/" +  getYear();

    }

    public String getTime() {
 return getHour() + ":" + getMinute() + ":" + getSecond();
    }

    public int getDayOfMonth() {
 return calendar.get(Calendar.DAY_OF_MONTH);
    }

    public int getDayOfYear() {
 return calendar.get(Calendar.DAY_OF_YEAR);
    }

    public int getWeekOfYear() {
 return calendar.get(Calendar.WEEK_OF_YEAR);
    }

    public int getWeekOfMonth() {
 return calendar.get(Calendar.WEEK_OF_MONTH);
    }

    public int getDayOfWeek() {
 return calendar.get(Calendar.DAY_OF_WEEK);
    }
    
    public int getHour() {
 return calendar.get(Calendar.HOUR_OF_DAY);
    }
   
    public int getMinute() {
 return calendar.get(Calendar.MINUTE);
    }

    public int getSecond() {
 return calendar.get(Calendar.SECOND);
    }

    public static void main(String args[]) {
 JspCalendar db = new JspCalendar();
 p("date: " + db.getDayOfMonth());
 p("year: " + db.getYear());
 p("month: " + db.getMonth());
 p("time: " + db.getTime());
 p("date: " + db.getDate());
 p("Day: " + db.getDay());
 p("DayOfYear: " + db.getDayOfYear());
 p("WeekOfYear: " + db.getWeekOfYear());
 p("era: " + db.getEra());
 p("ampm: " + db.getAMPM());
 p("DST: " + db.getDSTOffset());
 p("ZONE Offset: " + db.getZoneOffset());
 p("TIMEZONE: " + db.getUSTimeZone());
    }

    private static void p(String x) {
 System.out.println(x);
    }

    public int getEra() {
 return calendar.get(Calendar.ERA);
    }

    public String getUSTimeZone() {
 String[] zones = new String[] {"Hawaii", "Alaskan", "Pacific",
           "Mountain", "Central", "Eastern"};
 
 return zones[10 + getZoneOffset()];
    }

    public int getZoneOffset() {
 return calendar.get(Calendar.ZONE_OFFSET)/(60*60*1000);
    }

    public int getDSTOffset() {
 return calendar.get(Calendar.DST_OFFSET)/(60*60*1000);
    }

   
    public int getAMPM() {
 return calendar.get(Calendar.AM_PM);
    }
}