InputVerifier不显示每个组件图标（lable）

Question

我有一个表单，它设置了一个输入验证器。

我想当一个用户为一个文本字段键入一个正确的值，并想要转到其他文本字段时，除了文本字段之外，还应该显示一个勾选图标。但现在在我的代码中，当用户在第一个文本字段上键入正确的值并转到其他时，两个图标一起显示！

public class UserDialog extends JDialog {

JButton cancelBtn, okBtn;
JTextField fNameTf, lNameTf;
JRadioButton maleRb, femaleRb;
ButtonGroup group;
JLabel fNameLbl, fNamePicLbl, lNameLbl, lNamePicLbl, genderLbl, tempBtn, temp3;

    public UserDialog() {
    add(createForm(), BorderLayout.CENTER);
    setDefaultCloseOperation(DISPOSE_ON_CLOSE);
    setLocation(400, 100);
    pack();
    setVisible(true);
}
    public JPanel createForm() {
    JPanel panel = new JPanel();
    ImageIcon image = new ImageIcon("Check.png");

    okBtn = new JButton("Ok");
    cancelBtn = new JButton("Cancel");
    tempBtn = new JLabel();
    fNameLbl = new JLabel("First Name");
    fNamePicLbl = new JLabel(image);
    fNamePicLbl.setVisible(false);
    lNameLbl = new JLabel("Last Name");
    lNamePicLbl = new JLabel(image);
    lNamePicLbl.setVisible(false);
    genderLbl = new JLabel("Gender");

    maleRb = new JRadioButton("Male");
    femaleRb = new JRadioButton("Female");
    temp3 = new JLabel();
    group = new ButtonGroup();
    group.add(maleRb);
    group.add(femaleRb);

    fNameTf = new JTextField(10);
    fNameTf.setName("FnTF");
    fNameTf.setInputVerifier(new MyVerifier(new JComponent[]{maleRb, femaleRb, okBtn}));
    lNameTf = new JTextField(10);
    lNameTf.setName("LnTF");
    lNameTf.setInputVerifier(new MyVerifier(new JComponent[]{maleRb, femaleRb, okBtn}));

    panel.add(fNameLbl);
    panel.add(fNameTf);
    panel.add(fNamePicLbl);
    panel.add(lNameLbl);
    panel.add(lNameTf);
    panel.add(lNamePicLbl);
    panel.add(genderLbl);
    JPanel radioPanel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    radioPanel.add(maleRb);
    radioPanel.add(femaleRb);
    panel.add(radioPanel);
    panel.add(temp3);
    panel.add(okBtn);
    panel.add(cancelBtn);
    panel.add(tempBtn);

    panel.setLayout(new SpringLayout());
    SpringUtilities.makeCompactGrid(panel, 4, 3, 50, 10, 80, 60);
    return panel;
}
    public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run() {
            new UserDialog();
        }
    });
}

public class MyVerifier extends InputVerifier {
    private JComponent[] component;

    public MyVerifier(JComponent[] components) {
        component = components;
    }

    @Override
    public boolean verify(JComponent input) {
        String name = input.getName();

        if (name.equals("FnTF")) {
            String text = ((JTextField) input).getText().trim();
            if (text.matches(".*\\d.*") || text.length() == 0) {
                //disable dependent components
                for (JComponent r : component) {
                    r.setEnabled(false);
                }
                return false;
            }
        } else if (name.equals("LnTF")) {
            String text = ((JTextField) input).getText();
            if (text.matches(".*\\d.*") || text.length() == 0) {
                //disable dependent components
                for (JComponent r : component) {
                    r.setEnabled(false);
                }
                return false;
            }
        }
        //enable dependent components
        for (JComponent r : component) {
            r.setEnabled(true);
        }
        fNamePicLbl.setVisible(true);
        lNamePicLbl.setVisible(true);
        return true;
    }
}
}
}

已更新

 public class MyVerifier extends InputVerifier {
    private JComponent[] component;

    public MyVerifier(JComponent[] components) {
        component = components;
    }

    @Override
    public boolean verify(JComponent input) {
        String name = input.getName();

        if (name.equals("FnTF")) {
            String text = ((JTextField) input).getText().trim();
            if (text.matches(".*\\d.*") || text.length() == 0) {
                return false;
            }
        } else if (name.equals("LnTF")) {
            String text = ((JTextField) input).getText();
            if (text.matches(".*\\d.*") || text.length() == 0) {
                return false;
            }
        }
        return true;
    }

    @Override
    public boolean shouldYieldFocus(JComponent input) {
        boolean isValidDate = verify(input);
        if (isValidDate) {
            for (JComponent r : component) {
                r.setEnabled(true);
            }
        } else {
            for (JComponent r : component) {
                r.setEnabled(false);
            }
        }
        return isValidDate;
    }

Answer 1

但现在在我的代码中，当用户在第一个文本字段上键入正确的值并转到其他时，两个图标一起显示！

因为你这样做了：（阅读评论）

public boolean verify(JComponent input) {
        String name = input.getName();

        if (name.equals("FnTF")) {
            // your code
            }
        } else if (name.equals("LnTF")) {
            // your code

        }
        //enable dependent components
        for (JComponent r : component) {
            r.setEnabled(true);
        }
        /* And Now we are here */
        fNamePicLbl.setVisible(true); 
        lNamePicLbl.setVisible(true);
         // making visible two of them at once as soon as verify is called 
            // on any one of the components, verifier is registered

        return true;
    }

setVisible也应由if-else条件控制。为了更好地理解，您需要做以下事情：

      if (text.matches(".*\\d.*") || text.length() == 0) {
           // your code
        }
        else
        {
            fNamePicLbl.setVisible(true);

        } 

    fNameTf.setInputVerifier(new MyVerifier(new JComponent[]{maleRb, femaleRb, okBtn}));
    lNameTf = new JTextField(10);
    lNameTf.setName("LnTF");
    lNameTf.setInputVerifier(new MyVerifier(new JComponent[]{maleRb, femaleRb, okBtn}));

verify函数只用于验证数据：在用户要求的条件下数据是否有效。它不应该再做什么了。InputVerifier有另一个函数Boolean ShouldYieldFocus(Jcomponent):在将焦点转移到请求它的另一个Swing组件之前，调用输入验证器的ShouldYieldFocus方法，该方法决定被验证的组件应该在哪里失去焦点。只有当此方法返回true时，才会转移焦点。但是，您应该在此函数中编写所需的组件状态更改。

public boolean shouldYieldFocus(JComponent input) {
    boolean isDataValid =  verify(input);

    if(isDataValid); //do stuff

    return isDataValid; // if verify is true(valid) return true;
 }