JFormattedTextField上的Formatter.setCommitsOnValidEd

我有一个jFormattedTextField ，我设置setCommitsOnValidEdit true那么我添加了一个事件监听器上的“价值”属性“属性更改”。

在那第一焦点jFormattedTextField它打字的时候它不调用事件侦听器的方法。但在“focusLost”它调用事件侦听器后，当它再次接收集中在打字的时候调用事件侦听器。

我想事件监听器被调用，在任何时候任何更改后jFormattedTextField （即使在拳头焦点）。

有什么问题？我怎样才能解决这个问题？

Answer 1:

probably you have to look at DocumentListener example here

EDIT:

I know this issue from my 1st touch of JFormattedTextField, here comings example that isn't works at firts focusLost :-) and probably demonstrated your issue

minimum limit is there set at 10.000,- for both JFormattedTextField,

1st. JFormattedTextField handling FocusListener (output must be delayed into invokeLater)

2nd. JFormattedTextField handling DocumentListener (works every...)

inital look

here is same problem, because I put here only 500,- and on focusLost nothing changed, correct amount must be >= 10.000,-

on 2dn. focusLost works ....

no idea how is that possible, but solved by wrapping into invokeLater(), then works on 1st. focusLost (you have to uncomment these code lines)

from code

import java.awt.*;
import java.awt.event.*;
import java.math.RoundingMode;
import java.text.NumberFormat;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;

public class FormatterLimit {

    private JFrame frame = new JFrame();
    private JPanel pnl = new JPanel();
    private JLabel focusLabel = new JLabel(" focusLost Handle ");
    private JFormattedTextField formTextField;
    private JLabel docLabel = new JLabel(" document Handle ");
    private JFormattedTextField formTextField1;
    private NumberFormat formTextFieldFormat;
    private double amount = 10000.00;

    public FormatterLimit() {
        formTextFieldFormat = NumberFormat.getNumberInstance();
        formTextFieldFormat.setMinimumFractionDigits(2);
        formTextFieldFormat.setMaximumFractionDigits(2);
        formTextFieldFormat.setRoundingMode(RoundingMode.HALF_UP);

        focusLabel.setFont(new Font("Serif", Font.BOLD, 14));
        focusLabel.setForeground(Color.blue);
        focusLabel.setPreferredSize(new Dimension(120, 27));
        formTextField = new JFormattedTextField(formTextFieldFormat);
        formTextField.setValue(amount);
        formTextField.setFont(new Font("Serif", Font.BOLD, 22));
        formTextField.setForeground(Color.black);
        formTextField.setBackground(Color.yellow);
        formTextField.setPreferredSize(new Dimension(120, 27));
        formTextField.setHorizontalAlignment(SwingConstants.RIGHT);
        formTextField.addFocusListener(new FocusListener() {

            @Override
            public void focusGained(FocusEvent e) {
                formTextField.requestFocus();
                formTextField.setText(formTextField.getText());
                formTextField.selectAll();
            }

            @Override
            public void focusLost(FocusEvent e) {
                //Runnable doRun = new Runnable() {

                //@Override
                //public void run() {
                double t1a1 = (((Number) formTextField.getValue()).doubleValue());
                if (t1a1 < 1000) {
                    formTextField.setValue(amount);
                }
                //}
                // };
                //SwingUtilities.invokeLater(doRun);

            }
        });

        docLabel.setFont(new Font("Serif", Font.BOLD, 14));
        docLabel.setForeground(Color.blue);
        docLabel.setPreferredSize(new Dimension(120, 27));

        formTextField1 = new JFormattedTextField(formTextFieldFormat);
        formTextField1.setValue(amount);
        formTextField1.setFont(new Font("Serif", Font.BOLD, 22));
        formTextField1.setForeground(Color.black);
        formTextField1.setBackground(Color.yellow);
        formTextField1.setPreferredSize(new Dimension(120, 27));
        formTextField1.setHorizontalAlignment(SwingConstants.RIGHT);
        formTextField1.addFocusListener(new FocusListener() {

            @Override
            public void focusGained(FocusEvent e) {
                formTextField1.requestFocus();
                formTextField1.setText(formTextField1.getText());
                formTextField1.selectAll();
            }

            @Override
            public void focusLost(FocusEvent e) {
            }
        });
        formTextField1.getDocument().addDocumentListener(docListener);

        pnl = new JPanel();
        pnl.setBorder(new EmptyBorder(2, 2, 2, 2));
        pnl.setLayout(new GridLayout(2, 2));
        pnl.add(focusLabel);
        pnl.add(formTextField);
        pnl.add(docLabel);
        pnl.add(formTextField1);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(pnl, BorderLayout.CENTER);
        frame.setLocation(200, 200);
        frame.pack();
        frame.setVisible(true);
        formTextFieldFocus1();
    }
    //
    private DocumentListener docListener = new DocumentListener() {

        @Override
        public void changedUpdate(DocumentEvent documentEvent) {
            printIt(documentEvent);
        }

        @Override
        public void insertUpdate(DocumentEvent documentEvent) {
            printIt(documentEvent);
        }

        @Override
        public void removeUpdate(DocumentEvent documentEvent) {
            printIt(documentEvent);
        }

        private void printIt(DocumentEvent documentEvent) {
            DocumentEvent.EventType type = documentEvent.getType();
            double t1a1 = (((Number) formTextField1.getValue()).doubleValue());
            if (t1a1 < 1000) {
                Runnable doRun = new Runnable() {

                    @Override
                    public void run() {
                        formTextField1.setValue(amount);
                    }
                };
                SwingUtilities.invokeLater(doRun);
            }
        }
    };

    private void formTextFieldFocus1() {
        Runnable doRun = new Runnable() {

            @Override
            public void run() {
                formTextField1.grabFocus();
                formTextField1.requestFocus();
                formTextField1.setText(formTextField1.getText());
                formTextField1.selectAll();
            }
        };
        SwingUtilities.invokeLater(doRun);
    }

    private void formTextFieldFocus() {
        Runnable doRun = new Runnable() {

            @Override
            public void run() {
                formTextField.grabFocus();
                formTextField.requestFocus();
                formTextField.setText(formTextField.getText());
                formTextField.selectAll();
                formTextFieldFocus1();
            }
        };
        SwingUtilities.invokeLater(doRun);
    }

    public static void main(String args[]) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                FormatterLimit fl = new FormatterLimit();
            }
        });
    }
}

Answer 2:

其实，setCommitOnValidEdit应该总是工作像您期望的（并且确实在下面的代码片段），无需使用的DocumentListener，毕竟，该方法正是为了这个目的。所以我怀疑其他的东西是错的在你的环境。或者由于某种原因，第一个编辑不会被解析到任何有效？

    NumberFormatter numberFormatter = new NumberFormatter( 
            NumberFormat.getIntegerInstance());
    // allow or not doesn't make a difference
    numberFormatter.setAllowsInvalid(false);  
    numberFormatter.setCommitsOnValidEdit(true);
    JFormattedTextField readTimeOut = new JFormattedTextField(numberFormatter);
    PropertyChangeListener l = new PropertyChangeListener() {

        @Override
        public void propertyChange(PropertyChangeEvent evt) {
            LOG.info("got new value: " + evt.getNewValue());
        }
    };
    readTimeOut.addPropertyChangeListener("value", l);
    readTimeOut.setColumns(20);
    readTimeOut.setHorizontalAlignment(SwingConstants.RIGHT);    

    JFormattedTextField other = new JFormattedTextField(numberFormatter);
    other.addPropertyChangeListener("value", l);
    other.setColumns(20);
    other.setHorizontalAlignment(SwingConstants.RIGHT);    
    JPanel box = new JPanel();
    box.add(readTimeOut);
    box.add(other);