我使用了我在互联网上找到的这个代码，我想知道为什么只有突出显示器的“秒”部分可以使用键盘输入覆盖。使用的时间格式是HH：mm：ss。
如果“小时”或“分钟”部分突出显示，我按下小键盘上的数字，则没有任何反应。我在这里错过了什么吗？
由于
import javax.swing.*;
import javax.swing.text.DefaultFormatter;
import javax.swing.text.InternationalFormatter;
import java.text.DateFormat;
import java.text.Format;
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
/**
* <code>DateSpinner</code> is a spinner that is specialized in displaying or editing a a date or time.
* <p/>
* To change the value, you can use {@link #setValue(Object)} and pass in a Date. To get the
* Date, using {@link #getValue()}.
*/
public class DateSpinner extends JSpinner {
/**
*
*/
private static final long serialVersionUID = 1L;
public DefaultFormatter _formatter;
public DateEditor _timeEditor;
public DateFormat _format;
/**
* Creates a date spinner using "hh:mm:ss" as the format string.
*/
public DateSpinner() {
this("hh:mm:ss");
}
/**
* Creates a date spinner using the specified format string.
*
* @param format the format string as defined in {@link java.text.SimpleDateFormat}.
*/
public DateSpinner(String format) {
this(format, new Date());
}
/**
* Creates a date spinner using the specified format string and an initial value.
*
* @param format the format string as defined in {@link java.text.SimpleDateFormat}.
* @param date initial value
*/
public DateSpinner(String format, Date date) {
super(new SpinnerDateModel(date, null, null, Calendar.HOUR_OF_DAY));
setFormat(format);
customizeSpinner();
}
private void customizeDateEditor() {
JFormattedTextField.AbstractFormatter formatter = _timeEditor.getTextField().getFormatter();
if (formatter instanceof DefaultFormatter) {
_formatter = (DefaultFormatter) formatter;
}
else {
throw new IllegalStateException("The formatter is not an instance of DefaultFormatter.");
}
if (formatter instanceof InternationalFormatter) {
Format f = ((InternationalFormatter) formatter).getFormat();
if (f instanceof DateFormat) {
_format = ((DateFormat) f);
}
}
if (_format == null) {
throw new IllegalStateException("The format is not an instance of SimpleDateFormat.");
}
}
/**
* Sets the date format string used by this DateSpinner. Please note, this method call
* will recreate the DateEditor used by DateSpinner.
*
* @param format
*/
public void setFormat(String format) {
_timeEditor = createDateEditor(format);
customizeDateEditor();
setEditor(_timeEditor);
}
/**
* Customizes the spinner.
*/
protected void customizeSpinner() {
setLenient(false);
setCommitsOnValidEdit(true);
setAllowsInvalid(false);
setOverwriteMode(true);
//SpinnerWheelSupport.installMouseWheelSupport(this);
}
/**
* Creates the DateEditor.
*
* @param format
* @return the DateEditor.
*/
protected DateEditor createDateEditor(String format) {
return new DateEditor(this, format);
}
/**
* Sets when edits are published back to the
* <code>JFormattedTextField</code>. If true, <code>commitEdit</code>
* is invoked after every valid edit (any time the text is edited). On
* the other hand, if this is false than the <code>DefaultFormatter</code>
* does not publish edits back to the <code>JFormattedTextField</code>.
* As such, the only time the value of the <code>JFormattedTextField</code>
* will change is when <code>commitEdit</code> is invoked on
* <code>JFormattedTextField</code>, typically when enter is pressed
* or focus leaves the <code>JFormattedTextField</code>.
*
* @param commit Used to indicate when edits are committed back to the
* JTextComponent
*/
public void setCommitsOnValidEdit(boolean commit) {
_formatter.setCommitsOnValidEdit(commit);
}
/**
* Returns when edits are published back to the
* <code>JFormattedTextField</code>.
*
* @return true if edits are committed after every valid edit
*/
public boolean getCommitsOnValidEdit() {
return _formatter.getCommitsOnValidEdit();
}
/**
* Configures the behavior when inserting characters. If
* <code>overwriteMode</code> is true (the default), new characters
* overwrite existing characters in the model.
*
* @param overwriteMode Indicates if overwrite or overstrike mode is used
*/
public void setOverwriteMode(boolean overwriteMode) {
_formatter.setOverwriteMode(overwriteMode);
}
/**
* Returns the behavior when inserting characters.
*
* @return true if newly inserted characters overwrite existing characters
*/
public boolean getOverwriteMode() {
return _formatter.getOverwriteMode();
}
/**
* Sets whether or not the value being edited is allowed to be invalid
* for a length of time (that is, <code>stringToValue</code> throws
* a <code>ParseException</code>).
* It is often convenient to allow the user to temporarily input an
* invalid value.
*
* @param allowsInvalid Used to indicate if the edited value must always
* be valid
*/
public void setAllowsInvalid(boolean allowsInvalid) {
_formatter.setAllowsInvalid(allowsInvalid);
}
/**
* Returns whether or not the value being edited is allowed to be invalid
* for a length of time.
*
* @return false if the edited value must always be valid
*/
public boolean getAllowsInvalid() {
return _formatter.getAllowsInvalid();
}
/**
* Sets the time zone for the calendar of this DateFormat object.
*
* @param zone the given new time zone.
*/
public void setTimeZone(TimeZone zone) {
_format.setTimeZone(zone);
}
/**
* Gets the time zone.
*
* @return the time zone associated with the calendar of DateFormat.
*/
public TimeZone getTimeZone() {
return _format.getTimeZone();
}
/**
* Specify whether or not date/time parsing is to be lenient. With
* lenient parsing, the parser may use heuristics to interpret inputs that
* do not precisely match this object's format. With strict parsing,
* inputs must match this object's format.
*
* @param lenient when true, parsing is lenient
* @see java.util.Calendar#setLenient
*/
public void setLenient(boolean lenient) {
_format.setLenient(lenient);
}
/**
* Tell whether date/time parsing is to be lenient.
*/
public boolean isLenient() {
return _format.isLenient();
}
}
答案 0 :(得分：0)
从event dispatch thread启动时，example可以使用任意箭头键，数字键盘上的数字键正常工作。
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new DateSpinner());
f.pack();
f.setVisible(true);
}
});
}