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package javax.swing.text;
import java.awt.event.*;
import java.text.*;
import java.util.*;
import javax.swing.*;
import javax.swing.text.*;
DateFormatter is an InternationalFormatter that does its
formatting by way of an instance of java.text.DateFormat.
Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing. As of 1.4, support for long term storage
of all JavaBeans™
has been added to the java.beans package. Please see XMLEncoder.
See Also: Since: 1.4
/**
* DateFormatter is an <code>InternationalFormatter</code> that does its
* formatting by way of an instance of <code>java.text.DateFormat</code>.
* <p>
* <strong>Warning:</strong>
* Serialized objects of this class will not be compatible with
* future Swing releases. The current serialization support is
* appropriate for short term storage or RMI between applications running
* the same version of Swing. As of 1.4, support for long term storage
* of all JavaBeans™
* has been added to the <code>java.beans</code> package.
* Please see {@link java.beans.XMLEncoder}.
*
* @see java.text.DateFormat
*
* @since 1.4
*/
public class DateFormatter extends InternationalFormatter {
This is shorthand for
new DateFormatter(DateFormat.getDateInstance()).
/**
* This is shorthand for
* <code>new DateFormatter(DateFormat.getDateInstance())</code>.
*/
public DateFormatter() {
this(DateFormat.getDateInstance());
}
Returns a DateFormatter configured with the specified
Format instance.
Params: - format – Format used to dictate legal values
/**
* Returns a DateFormatter configured with the specified
* <code>Format</code> instance.
*
* @param format Format used to dictate legal values
*/
public DateFormatter(DateFormat format) {
super(format);
setFormat(format);
}
Sets the format that dictates the legal values that can be edited
and displayed.
If you have used the nullary constructor the value of this property
will be determined for the current locale by way of the
Dateformat.getDateInstance() method.
Params: - format – DateFormat instance used for converting from/to Strings
/**
* Sets the format that dictates the legal values that can be edited
* and displayed.
* <p>
* If you have used the nullary constructor the value of this property
* will be determined for the current locale by way of the
* <code>Dateformat.getDateInstance()</code> method.
*
* @param format DateFormat instance used for converting from/to Strings
*/
public void setFormat(DateFormat format) {
super.setFormat(format);
}
Returns the Calendar that DateFormat is associated with,
or if the Format is not a DateFormat
Calendar.getInstance is returned.
/**
* Returns the Calendar that <code>DateFormat</code> is associated with,
* or if the <code>Format</code> is not a <code>DateFormat</code>
* <code>Calendar.getInstance</code> is returned.
*/
private Calendar getCalendar() {
Format f = getFormat();
if (f instanceof DateFormat) {
return ((DateFormat)f).getCalendar();
}
return Calendar.getInstance();
}
Returns true, as DateFormatterFilter will support
incrementing/decrementing of the value.
/**
* Returns true, as DateFormatterFilter will support
* incrementing/decrementing of the value.
*/
boolean getSupportsIncrement() {
return true;
}
Returns the field that will be adjusted by adjustValue.
/**
* Returns the field that will be adjusted by adjustValue.
*/
Object getAdjustField(int start, Map attributes) {
Iterator attrs = attributes.keySet().iterator();
while (attrs.hasNext()) {
Object key = attrs.next();
if ((key instanceof DateFormat.Field) &&
(key == DateFormat.Field.HOUR1 ||
((DateFormat.Field)key).getCalendarField() != -1)) {
return key;
}
}
return null;
}
Adjusts the Date if FieldPosition identifies a known calendar
field.
/**
* Adjusts the Date if FieldPosition identifies a known calendar
* field.
*/
Object adjustValue(Object value, Map attributes, Object key,
int direction) throws
BadLocationException, ParseException {
if (key != null) {
int field;
// HOUR1 has no corresponding calendar field, thus, map
// it to HOUR0 which will give the correct behavior.
if (key == DateFormat.Field.HOUR1) {
key = DateFormat.Field.HOUR0;
}
field = ((DateFormat.Field)key).getCalendarField();
Calendar calendar = getCalendar();
if (calendar != null) {
calendar.setTime((Date)value);
int fieldValue = calendar.get(field);
try {
calendar.add(field, direction);
value = calendar.getTime();
} catch (Throwable th) {
value = null;
}
return value;
}
}
return null;
}
}