Program
import java.util.Date;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
public class FormatInstant
{
public static void main(String[] args)
{
DateTimeFormatter DATE_TIME_FORMATTER = DateTimeFormatter.ofPattern(“yyyy-MM-dd HH:mm:ss”).withZone(ZoneId.systemDefault());
System.out.println(DATE_TIME_FORMATTER.format(new Date().toInstant()));
}
}
Output
2021-04-12 11:29:47
Description
public static DateTimeFormatter ofPattern(String pattern)
Creates a formatter using the specified pattern.
This method will create a formatter based on a simple pattern of letters and symbols as described in the class documentation. For example, d MMM uuuu will format 2011-12-03 as ‘3 Dec 2011’.
The formatter will use the default FORMAT locale. This can be changed using withLocale(Locale) on the returned formatter. Alternatively use the ofPattern(String, Locale) variant of this method.
The returned formatter has no override chronology or zone. It uses SMART resolver style.
Parameters:
pattern – the pattern to use, not null
Returns:
the formatter based on the pattern, not null
Throws:
IllegalArgumentException – if the pattern is invalid
public String format(TemporalAccessor temporal)
Formats a date-time object using this formatter.
This formats the date-time to a String using the rules of the formatter.
Parameters:
temporal – the temporal object to format, not null
Returns:
the formatted string, not null
Throws:
DateTimeException – if an error occurs during formatting
