Admin: 1 версия

2010-05-31T15:29:00Z

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== Add AM PM to time using SimpleDateFormat ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();
String strDateFormat = "HH:mm:ss a";
SimpleDateFormat sdf = new SimpleDateFormat(strDateFormat);
System.out.println(sdf.format(date));
}
}
//10:20:12 AM</source>



== Check if a String is a valid date ==



<source lang="java">
import java.text.ParseException;
import java.text.SimpleDateFormat;
public class Main {
public static boolean isValidDate(String inDate) {
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
dateFormat.setLenient(false);
try {
dateFormat.parse(inDate.trim());
} catch (ParseException pe) {
return false;
}
return true;
}
public static void main(String[] args) {
System.out.println(isValidDate("2004-02-29"));
System.out.println(isValidDate("2005-02-29"));
}
}
/*
true
false
*/</source>



== Date Formatting and Localization ==



<source lang="java">
import java.text.DateFormat;
import java.text.SimpleDateFormat;
public class Main {
public static void main(String[] args) {
DateFormat df = DateFormat.getDateInstance();
if (df instanceof SimpleDateFormat) {
SimpleDateFormat sdf = (SimpleDateFormat) df;
System.out.println(sdf.toPattern());
} else {
System.out.println("sorry");
}
}
}</source>



== Format date in dd/mm/yyyy format ==



<source lang="java">
import java.util.Date;
import java.text.SimpleDateFormat;
public class Main {
public static void main(String[] args) {
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yy");
String strDate = sdf.format(date);
System.out.println("formatted date in mm/dd/yy : " + strDate);

sdf = new SimpleDateFormat("dd/MM/yyyy");
strDate = sdf.format(date);
System.out.println("formatted date in dd/MM/yyyy : " + strDate);
}
}</source>



== Format date in mm-dd-yyyy hh:mm:ss format ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yy");
String strDate = sdf.format(date);
System.out.println("formatted date in mm/dd/yy : " + strDate);
sdf = new SimpleDateFormat("MM-dd-yyyy hh:mm:ss");
strDate = sdf.format(date);
System.out.println("formatted date in mm-dd-yyyy hh:mm:ss : " + strDate);
}
}</source>



== Format hour in H (ormat like 0, 1...23. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("H");
System.out.println("hour in H format : " + sdf.format(date));
}
}
//hour in h format : 11</source>



== Format hour in h (n AM/PM) format like 1, 2..12. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

String strDateFormat = "h";
SimpleDateFormat sdf = new SimpleDateFormat(strDateFormat);
System.out.println("hour in h format : " + sdf.format(date));
}
}
//hour in h format : 11</source>



== Format hour in HH (ormat like.23. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("HH");
System.out.println("hour in HH format : " + sdf.format(date));
}
}
//hour in h format : 11</source>



== Format hour in hh (n AM/PM) format like.12. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("hh");
System.out.println("hour in hh format : " + sdf.format(date));
}
}
//hour in h format : 11</source>



== Format hour in K (n AM/PM) format like 0, 1..11. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("K");
System.out.println("hour in K format : " + sdf.format(date));
}
}
//hour in h format : 11</source>



== Format hour in k (ormat like 1, 2..24. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("k");
System.out.println("hour in k format : " + sdf.format(date));
}
}
//hour in h format : 11</source>



== Format hour in KK (ormat like..11. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("KK");
System.out.println("hour in KK format : " + sdf.format(date));
}
}
// hour in h format : 11</source>



== Format hour in kk (ormat like.24. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("kk");
System.out.println("hour in kk format : " + sdf.format(date));
}
}
//hour in h format : 11</source>



== Format minutes in mm format liketc. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("mm");
System.out.println("minutes in mm format : " + sdf.format(date));
}
}
// minutes in m format : 35</source>



== Format month in M format like 1,2 etc ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("M");
System.out.println("Current Month in M format : " + sdf.format(date));
}
}
//Current Month in M format : 2</source>



== Format Month in MM format liketc. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("MM");
System.out.println("Current Month in MM format : " + sdf.format(date)); }
}
//Current Month in M format : 02</source>



== Format Month in MMM format like Jan, Feb etc. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("MMM");
System.out.println("Current Month in MMM format : " + sdf.format(date));
}
}
//Current Month in MMM format : Feb</source>



== Format Month in MMMM format like January, February etc. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("MMMM");
System.out.println("Current Month in MMMM format : " + sdf.format(date));

}
}
//Current Month in MMMM format : February</source>



== Format seconds in s format like 1,2 etc. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("s");
System.out.println("seconds in s format : " + sdf.format(date));
}
}
//seconds in s format : 40</source>



== Format seconds in ss format liketc. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("ss");
System.out.println("seconds in ss format : " + sdf.format(date));
}
}
//seconds in ss format : 14</source>



== Format TimeZone in z (General time zone) format like EST. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("zzz");
System.out.println("TimeZone in z format : " + sdf.format(date));
}
}
//TimeZone in z format : PST</source>



== Format TimeZone in Z (RFC ormat like -8000. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("Z");
System.out.println("TimeZone in Z format : " + sdf.format(date));
}
}
//TimeZone in Z format : -0800</source>



== Format TimeZone in zzzz format Eastern Standard Time. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("zzzz");
System.out.println("TimeZone in zzzz format : " + sdf.format(date));
}
}
//TimeZone in zzzz format : Pacific Standard Time</source>



== Formatting a Date Using a Custom Format ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("yy");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== Formatting date with full day and month name and show time up to milliseconds with AM/PM ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("EEEE, dd MMMM yyyy, hh:mm:ss.SSS a");
String today = formatter.format(new Date());
System.out.println("Today : " + today);
}
}</source>



== Formatting day in dd format liketc. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
String strDateFormat = "dd";
SimpleDateFormat sdf = new SimpleDateFormat(strDateFormat);
System.out.println("Current day in dd format : " + sdf.format(new Date()));
}
}</source>



== Formatting day in d format like 1,2 etc ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();
String strDateFormat = "d";
SimpleDateFormat sdf = new SimpleDateFormat(strDateFormat);
System.out.println("Current day in d format : " + sdf.format(date));
}
}</source>



== Formatting day of week in EEEE format like Sunday, Monday etc. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {

String strDateFormat = "EEEE";
SimpleDateFormat sdf = new SimpleDateFormat(strDateFormat);
System.out.println("Current day of week in EEEE format : " + sdf.format(new Date()));
}
}</source>



== Formatting day of week using SimpleDateFormat ==



<source lang="java">
//Formatting day of week in E format like Sun, Mon etc.
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();
String strDateFormat = "E";
SimpleDateFormat sdf = new SimpleDateFormat(strDateFormat);
System.out.println("Current day of week in E format : " + sdf.format(date));
}
}</source>



== Formatting minute in m format like 1,2 etc. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();

SimpleDateFormat sdf = new SimpleDateFormat("m");
System.out.println("minutes in m format : " + sdf.format(date));

}
}
//minutes in m format : 35</source>



== Format year in yy format liketc ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yy");
System.out.println("Current year in yy format : " + sdf.format(date));
}
}
//Current year in yy format : 09</source>



== Format year in yyyy format like etc. ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) {
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy");
System.out.println("Current year in yyyy format : " + sdf.format(date));
}
}
//Current year in yyyy format : 2009</source>



== Full day name: SimpleDateFormat("EEEE") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("EEEE");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== Full length of month name: SimpleDateFormat("MMMM") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("MMMM");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== Get Today"s Date ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Calendar;
public class Main {
public static void main(String[] args) throws Exception {
Calendar calendar = Calendar.getInstance();
SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
System.out.println(dateFormat.format(calendar.getTime()));
}
}
//17/02/2009</source>



== new SimpleDateFormat("a"): The am/pm marker ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("a");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== new SimpleDateFormat("hh") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("hh");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== new SimpleDateFormat("HH.mm.ss") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("HH.mm.ss");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== new SimpleDateFormat("hh:mm:ss a") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Date date = new Date();
Format formatter = new SimpleDateFormat("hh:mm:ss a");
String s = formatter.format(date);
System.out.println(s);
}
}</source>



== new SimpleDateFormat("HH:mm:ss Z") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("HH:mm:ss Z");
Date date = (Date) formatter.parseObject("22:14:02 -0500");
System.out.println(date);
}
}</source>



== new SimpleDateFormat("H") // The hour (0-23) ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("H");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== new SimpleDateFormat("mm") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("mm");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== new SimpleDateFormat("m"): The minutes ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("m");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== new SimpleDateFormat("ss") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("ss");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== new SimpleDateFormat("s"): The seconds ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("s");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== new SimpleDateFormat("Z") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("Z");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== new SimpleDateFormat("z"): The time zone ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("z");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== new SimpleDateFormat("zzzz") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("zzzz");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== Parsing custom formatted date string into Date object using SimpleDateFormat ==



<source lang="java">
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] args) throws Exception {
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yy");
Date date = sdf.parse("31/12/06");
System.out.println(date);
}
}
//Sun Dec 31 00:00:00 PST 2006</source>



== SimpleDateFormat("dd-MMM-yy") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("dd-MMM-yy");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== SimpleDateFormat("E, dd MMM yyyy HH:mm:ss Z") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("E, dd MMM yyyy HH:mm:ss Z");
String s = formatter.format(new Date());
}
}</source>



== SimpleDateFormat("MM/dd/yy") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Date date = new Date();
Format formatter = new SimpleDateFormat("MM/dd/yy");
String s = formatter.format(date);
System.out.println(s);
}
}</source>



== SimpleDateFormat("MM"): number based month value ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("MM");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== SimpleDateFormat("yyyy") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("yyyy");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== The day in week: SimpleDateFormat("E") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("E");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== The day number: SimpleDateFormat("d") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("d");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== The month: SimpleDateFormat("M") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("M");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== Three letter-month value: SimpleDateFormat("MMM") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("MMM");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>



== Two digits day number: SimpleDateFormat("dd") ==



<source lang="java">
import java.text.Format;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Main {
public static void main(String[] argv) throws Exception {
Format formatter = new SimpleDateFormat("dd");
String s = formatter.format(new Date());
System.out.println(s);
}
}</source>

Java Tutorial/Development/SimpleDateFormat - История изменений

в 17:44, 31 мая 2010

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