Java 当框架在Swing中加载时，如何在JDateChooser上设置焦点？

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

加载帧时如何在日期选择器上显示焦点

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

如何验证用户只能输入日期和格式的文本字段

如何在swing中设置jdatechooser图标的焦点 代码

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

源代码

public class welcome extends javax.swing.JFrame {

    public static final String DATE_FORMAT_NOW = "dd/MMM/YYYY ";
    Calendar cal = Calendar.getInstance();
    SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT_NOW);
    Date date = new Date();



    /**
     * Creates new form welcome
     */
    public welcome() {
        initComponents();



         sdf.setLenient(false);

         String dt = sdf.format(cal.getTime());
         System.out.println(dt);


            try  
            {  
                date = sdf.parse(dt); 
                 System.out.println(date);
            }  
            catch(ParseException pe)  
            {  
                System.out.println("pe: " + pe.getMessage());  
                Toolkit.getDefaultToolkit().beep();  
            }  
            jLabel3.setText(dt);
            jTextField1.setText(dt);
     }

private void jTextField1KeyPressed(java.awt.event.KeyEvent evt) {                                       
        // TODO add your handling code here:
   //   System.out.println("guihgio");
      if (evt.getKeyCode() == KeyEvent.VK_ENTER) {

            System.out.println("enter press key");


              this code is not working//

      char c = evt.getKeyChar();
      if (!((c >= '0') && (c <= '9') ||
         (c == KeyEvent.VK_BACK_SPACE) ||
         (c == KeyEvent.VK_DELETE) || (c == KeyEvent.VK_SLASH)))        
      {

           JOptionPane.showMessageDialog(null, "Please Enter Valid");
           evt.consume();
      }
  }

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

私有void jSpinner1StateChanged（javax.swing.event.ChangeEvent evt）{
//TODO在此处添加您的处理代码： System.out.println（“gijjhbip”）； System.out.println（“Source:+evt.getSource（））； }

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

私有void jFormattedTextField1KeyPressed（java.awt.event.KeyEvent evt）{
//TODO在此处添加您的处理代码：

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

    System.out.println(evt.getKeyChar());

   if (evt.getKeyCode() == KeyEvent.VK_ENTER) {

       Date date = (Date) evt.getSource();
      if(!(date.equals(format)))
      {
          evt.consume();
      }
   }

---

我不知道你用的是什么图书馆，但为什么不试试这个呢

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

第一个问题： 您可以使用JFormattedTextField，JTextField的实例

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

    DateFormat format = new SimpleDateFormat("dd/MM/yyyy");
    DateFormatter formatter = new DateFormatter(format);  
    format.setLenient(false);  
    formatter.setAllowsInvalid(false);  
    formatter.setOverwriteMode(true);  
    JFormattedTextField formattedTextField = new JFormattedTextField(formatter);
    formattedTextField.setValue(new Date());
    formattedTextField.addKeyListener(new KeyAdapter() {

        @Override
        public void keyPressed(KeyEvent evt) {
            //System.out.println(evt.getKeyChar());
            //TODO
        }
    });

第二个问题： getFocuse的唯一方法是更改JDateChoose的源代码； 因为源代码是

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

    protected JButton calendarButton;
    ...
    calendarButton = new JButton(icon) {

        public boolean isFocusable() {
            return false;
        }
    };

“如何验证用户只能输入日期和格式的文本字段？”

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

IMHO获取用户输入的日期是一个坏主意。验证输入将成为一个头痛的问题，对程序来说效率低下，因为用户可以输入任何字符组合。相反，您可以使用

JSpinner

使用

DateListModel

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

public static void main(String[] args) {
    Date date = new Date();
    JSpinner spinner = new JSpinner();
    spinner.setModel(new SpinnerDateModel(date, null, null, Calendar.DAY_OF_WEEK));
    JOptionPane.showConfirmDialog(null, spinner, "Spinner:"
            ,JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);

}

见|

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

---

但话说回来，为什么还要允许输入今天的日期呢？除了从用户那里获取输入之外，可以通过多种方式检索数据

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

---

如果您真的坚持按自己的方式输入文本字段并希望进行验证，则始终可以捕获

ParseException

。但在这种情况下，您需要向用户指定需要输入的格式，并在用户输入的格式不正确或不正确时发出某种通知真正的约会

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

SimpleDateFormat formatter = new SimplDateFormat(DATE_FORMAT_NOW);
String dateString = textField.getText();
Date date;
try {
    date = formatter.parse(dateString);
} catch (ParseException) {
    statusLabel.setText("Please enter a valid date");
    // or JOptionPane.showMessageDialog(null, "Please Enter a valid Date");
}

但同样的问题是，用户可以输入一个随机日期，如2102中的某个日期。因此，我建议使用

JSpinner

或不可编辑的文本字段，只显示今天的日期

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

---

更新试试这个

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

导入java.util.Date； 导入java.text.simpleDataFormat； 导入javax.swing.*

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

public class SpinnerDateTest {

    public static void main(String[] args) {
        Date date = new Date();
        JSpinner spinner = new JSpinner();
        SimpleDateFormat formatter = new SimpleDateFormat("dd/MMM//yyyy");
        String dateString = formatter.format(date);
        spinner.setModel(new SpinnerListModel(new String[]{dateString}));
        JOptionPane.showConfirmDialog(null, spinner, "Spinner:"
                ,JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);

    }
}

或者使用

SpinnerDateModel

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

public static void main(String[] args) {
    Date date = new Date();
    JSpinner spinner = new JSpinner();
    spinner.setModel(new SpinnerDateModel(date, null, null, Calendar.DAY_OF_WEEK));
    JOptionPane.showConfirmDialog(null, spinner, "Spinner:"
            ,JOptionPane.OK_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE);

}

---

你可以用它来聚焦

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

jDateChooser.getDateEditor().getUiComponent().requestFocusInWindow();

如果你想控制一些事件

     how could  I check THAT date Enterd by user in date format in JFormattedTextField...please help  IN KEY PRESSED EVENT

       my code is here

jDateChooser.getDateEditor().getUiComponent().addKeyListener(new listenerClass());

---

一旦获得焦点，请求焦点就没有意义了。我应该使用什么事件来单击datechooser图标？我已经尝试过了，但没有成功。请给我发送问题代码如何验证TextField可能这有助于jDateChooser2.requestFocusInWindow（）；无法专注于日期选择器图标加载框架时，我如何在图标日期选择器上设置foucs有人可以回答第二个问题。我如何验证日期格式的文本字段…如何在JFormattedTextField中检查用户以日期格式输入的日期…请帮助！！！！如果我专注于日期，请解释第二个问题选择器我可以从calenader中选择日期。我可以轻松解决问题。对不起，我从未使用过

JDateChooser

，所以我不知道它是如何工作的。请将SPINNER的当前日期代码发送给我，请将新bie发送给spinnerSpinnerModel snd=新SpinnerDateModel（新日期（），null，null，Calendar.DAY\u OF_MONTH）；JSpinner spnDate=new JSpinner（snd）；如何添加微调器标签请提供帮助。如果使用NETBAENS添加到SPIINER CALSS OBJ IM错误：未知符号错误。