public abstract boolean isSupported (TemporalField field)

Checks if the specified field is supported.

This checks if the date-time can be queried for the specified field. If false, then calling the range and get methods will throw an exception.

field    the field to check, null returns false

Returns:  true if this date-time can be queried for the field, false if not

@implSpec Implementations must check and handle all fields defined in ChronoField. If the field is supported, then true must be returned, otherwise false must be returned.

If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.isSupportedBy(TemporalAccessor) passing this as the argument.

Implementations must ensure that no observable state is altered when this read-only method is invoked.