小编典典

如何使用DefaultEditor方法检查JSpinner字段上的手动编辑

java

我正在从这里改编代码:

值更改侦听器到JTextField

编辑2

当我按下向上微调箭头时,以下代码给我一个无限循环的对话框:

STRING:STRING:10个变量:10 STRING:STRING:10个变量:10 STRING:STRING:10个变量:10 .....

警告您将需要使用taskmanager杀死它。

    public static void main(String[] args) {
    // TODO Auto-generated method stub

    JFrame F = new JFrame();
    F.setVisible(true);
    JPanel p = new JPanel();


    final JSpinner spin2 = new JSpinner();
    spin2.setModel(new SpinnerNumberModel(10, 10, 100, 1));

    JComponent comp = spin2.getEditor();
    JFormattedTextField field = (JFormattedTextField) comp.getComponent(0);
    DefaultFormatter formatter = (DefaultFormatter) field.getFormatter();
    formatter.setCommitsOnValidEdit(true);


    ((JSpinner.DefaultEditor)spin2.getEditor()).getTextField().getDocument().addDocumentListener(new DocumentListener() {
          public void changedUpdate(DocumentEvent e) {
                warn();
              }
              public void removeUpdate(DocumentEvent e) {
                warn();
              }
              public void insertUpdate(DocumentEvent e) {
                warn();
              }

              public void warn() {
                  String text = ((JSpinner.DefaultEditor)spin2.getEditor()).getTextField().getText();
                  JOptionPane.showMessageDialog(null,   "STRING: "+text, "Error Massage",     JOptionPane.ERROR_MESSAGE);
                  if (text != null && !text.trim().isEmpty()) {
                      int stringValue = Integer.parseInt(((JSpinner.DefaultEditor)spin2.getEditor()).getTextField().getText());
                      JOptionPane.showMessageDialog(null,
                              "VALS: "+spin2.getValue(), "Error Massage",
                              JOptionPane.ERROR_MESSAGE);
                     if (stringValue<10 || stringValue >100){
                       JOptionPane.showMessageDialog(null,
                          "Error: Number outside bounds", "Error Massage",
                          JOptionPane.ERROR_MESSAGE);
                     }

                  }
              }
            });


    p.add(spin2);


    F.add(p);
    F.pack();
    F.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


}

编辑3

当无效时,它将背景更改为红色;当字段失去焦点时,BUT值将恢复为先前的值(如果无效)。我希望能够在此时建立一个JOptionPane,说值仍然无效,而不是恢复到以前的值:

        ((JSpinner.DefaultEditor)Position.getEditor()).getTextField().addPropertyChangeListener(new PropertyChangeListener() {

            @Override
            public void propertyChange(PropertyChangeEvent evt) {
                //LOG.info("" + evt);
                if ("editValid".equals(evt.getPropertyName())) {
                    if (Boolean.FALSE.equals(evt.getNewValue())) {
                        SpinnerNumberModel model = (SpinnerNumberModel) Position.getModel();

                        ((JSpinner.DefaultEditor)Position.getEditor()).getTextField().setBackground(Color.RED);
                        ((JSpinner.DefaultEditor)Position.getEditor()).getTextField().setToolTipText("Amount must be in range [ " + model.getMinimum() + " ... " + model.getMaximum() + " ] for this symbol");

                    }
                    else{
                        ((JSpinner.DefaultEditor)Position.getEditor()).getTextField().setBackground(Color.WHITE);
                    }
                }

            }
        });

/////////////////////////////////////////////////////
/////////////////////////////////////////////////////

原始问题

但是,如果我使用微调器将值设置为低于下限。我在文本字段中得到“(”,并且出现此错误:

线程“ AWT-
EventQueue-0”中的异常java.lang.NumberFormatException:对于输入字符串:java.lang.Integer.parseInt(Integer.java:java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)处的异常:
504),网址为com.NResearch.ValueAtRisk.Sigma $
7.warn(Sigma.java:626),网址为com.NResearch.ValueAtRisk.Sigma $
7.removeUpdate(Sigma.java),网址为com.NResearch.ValueAtRisk.Sigma $
7.warn(Sigma.java:626)
:619)在javax.swing.text.AbstractDocument.fireRemoveUpdate(AbstractDocument.java:260)在javax.swing.text.AbstractDocument.handleRemove(AbstractDocument.java:623)在javax.swing.text.AbstractDocument.remove(AbstractDocument。
javax.swing.text.AbstractDocument.replace(AbstractDocument.java:667)的javax.swing.text.JTextComponent.setText(JTextComponent.java:1718)的javax.swing.text.AbstractDocument.replace(AbstractDocument.java:667)。javax.swing.text.DefaultFormatter.install(DefaultFormatter.java:124)处的JFormattedTextField
$ AbstractFormatter.install(JFormattedTextField.java:949)at
javax.swing处的javax.swing.text.InternationalFormatter.install(InternationalFormatter.java:285)
javax.swing的.JFormattedTextField.setFormatter(JFormattedTextField.java:465)在java.awt.Component.processEvent(JFormattedTextField.setValue(JFormattedTextField.java:789)在javax.swing.JFormattedTextField.processFocusEvent(JFormattedTextField.java:636)组件java.awt.Container.processEvent(Container.java:2229)上的Component.java:6261)java.awt.Container.dispatchEventImpl(Container.java:2287)上java.awt.Component.dispatchEventImpl(Component.java:4861)的)在java.awt.KeyboardFocusManager处的java.awt.Component.dispatchEvent(Component.java:4687)。java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:938)上的redispatchEvent(KeyboardFocusManager.java:1895)java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:570)上的java.awt.Component.dispatchEventImpl
:4731)at java.awt.Container.dispatchEventImpl(Container.java:2287)at
java.awt.Component.dispatchEvent(Component.java:4687)at
java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)at java
.awt.EventQueue.access $ 200(EventQueue.java:103)at java.awt.EventQueue $
3.run(EventQueue.java:694)at java.awt.EventQueue $
3.run(EventQueue.java:692)at java.security
java.security.ProtectionDomain的.AccessController.doPrivileged(本机方法)$
java.security的.doIntersectionPrivilege(ProtectionDomain.java:76)。java.awt.EventQueue
$ 4.run(EventQueue.java:708)处的ProtectionDomain $
1.doIntersectionPrivilege(ProtectionDomain.java:87)在java.security.AccessController处的java.awt.EventQueue
$ 4.run(EventQueue.java:706)中。
java.security.ProtectionDomain上的doPrivileged(本机方法)$
1.doIntersectionPrivilege(ProtectionDomain.java:76)在java.awt.EventQueue.dispatchEvent(EventQueue.java:705)在java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
)的java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)的java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)的java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)的Java
.EventDispatchThread.pumpEvents(EventDispatchThread.java:138),位于java.awt.EventDispatchThread。运行(EventDispatchThread.java:91)

final JSpinner spin2 = new JSpinner();
spin2.setModel(new SpinnerNumberModel(10, 10, 100, 1));

JComponent comp = spin2.getEditor();
JFormattedTextField field = (JFormattedTextField) comp.getComponent(0);
DefaultFormatter formatter = (DefaultFormatter) field.getFormatter();
formatter.setCommitsOnValidEdit(true);


((JSpinner.DefaultEditor)spin2.getEditor()).getTextField().getDocument().addDocumentListener(new DocumentListener() {
          public void changedUpdate(DocumentEvent e) {
                warn();
              }
              public void removeUpdate(DocumentEvent e) {
                warn();
              }
              public void insertUpdate(DocumentEvent e) {
                warn();
              }

              public void warn() {
                  int stringValue = Integer.parseInt(((JSpinner.DefaultEditor)spin2.getEditor()).getTextField().getText());
                  JOptionPane.showMessageDialog(null,
                          "VALS: "+spin2.getValue(), "Error Massage",
                          JOptionPane.ERROR_MESSAGE);
                 if (stringValue<10 || stringValue >100){
                   JOptionPane.showMessageDialog(null,
                      "Error: Please enter number bigger than 0", "Error Massage",
                      JOptionPane.ERROR_MESSAGE);
                 }

              }
            });

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2020-11-30

共1个答案

小编典典

自定义DocumentListeners和formattedTextField不能很好地配合使用,最好不要混用。而是在侦听其editValid属性更改的文本字段上使用PropertyChangeListener:每当更改为false时,您就可以通知用户

field.addPropertyChangeListener(new PropertyChangeListener() {

    @Override
    public void propertyChange(PropertyChangeEvent evt) {
        LOG.info("" + evt);
        if ("editValid".equals(evt.getPropertyName()) 
            &&  Boolean.FALSE.equals(evt.getNewValue())) {
          SpinnerNumberModel model = (SpinnerNumberModel) spin2.getModel();  
          JOptionPane.showMessageDialog(null,
          "Error: Number must be in range [" + model.getMinimum() + " ..." + model.getMaximum() + "]",
           "Error Massage",
          JOptionPane.ERROR_MESSAGE);

        }

    }
});

顺便说一句,就我个人而言,我同意Mad的看法-这样的侵入性通知会惹恼我,也可能会惹恼您的用户。

2020-11-30