Friday, March 20, 2009

Java Date and Time

Get the current Date and Time

import java.util.Calendar;
import java.text.SimpleDateFormat;

public class DateUtils {
public static final String DATE_FORMAT_NOW = "yyyy-MM-dd HH:mm:ss";

public static String now() {
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT_NOW);
return sdf.format(cal.getTime());

}

public static void main(String arg[]) {
System.out.println("Now : " + DateUtils.now());
}
}

Here some formatting possibilities available through the SimpleDateFormat class.

import java.util.Calendar;
import java.text.SimpleDateFormat;

public class DateUtils {


public static String now(String dateFormat) {
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
return sdf.format(cal.getTime());

}

public static void main(String arg[]) {
System.out.println(DateUtils.now("dd MMMMM yyyy"));
System.out.println(DateUtils.now("yyyyMMdd"));
System.out.println(DateUtils.now("dd.MM.yy"));
System.out.println(DateUtils.now("MM/dd/yy"));
System.out.println(DateUtils.now("yyyy.MM.dd G 'at' hh:mm:ss z"));
System.out.println(DateUtils.now("EEE, MMM d, ''yy"));
System.out.println(DateUtils.now("h:mm a"));
System.out.println(DateUtils.now("H:mm:ss:SSS"));
System.out.println(DateUtils.now("K:mm a,z"));
System.out.println(DateUtils.now("yyyy.MMMMM.dd GGG hh:mm aaa"));
}
}

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