ChronoField
Description
ChronoField enum defines
a standard set of fields, such as
AMPM_OF_DAY, DAY_OF_MONTH, DAY_OF_WEEK, DAY_OF_YEAR, ERA,
HOUR_OF_DAY, MINUTE_OF_HOUR, MONTH_OF_YEAR,
SECOND_OF_MINUTE, YEAR, YEAR_OF_ERA.
Example
The following code shows how to use a ChronoField to extract the field value from a datetime.
import java.time.LocalDateTime;
import java.time.temporal.ChronoField;
/* ww w.j av a2 s.c o m*/
public class Main {
public static void main(String[] args) {
LocalDateTime now = LocalDateTime.now();
System.out.println(now.get(ChronoField.YEAR));
System.out.println(now.get(ChronoField.MONTH_OF_YEAR));
System.out.println(now.get(ChronoField.DAY_OF_MONTH));
System.out.println(now.get(ChronoField.HOUR_OF_DAY));
System.out.println(now.get(ChronoField.HOUR_OF_AMPM));
System.out.println(now.get(ChronoField.AMPM_OF_DAY));
}
}
The code above generates the following result.
Example 2
The following code shows how to check if a data time object supports a ChronoField.
import java.time.LocalDateTime;
import java.time.temporal.ChronoField;
/*w ww . j a v a 2s . c o m*/
public class Main {
public static void main(String[] args) {
LocalDateTime now = LocalDateTime.now();
System.out.println(now.isSupported(ChronoField.YEAR));
System.out.println(now.isSupported(ChronoField.HOUR_OF_DAY));
System.out.println(ChronoField.YEAR.isSupportedBy(now));
System.out.println(ChronoField.HOUR_OF_DAY.isSupportedBy(now));
}
}
The code above generates the following result.
