隨筆檔案

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);
??? }
}