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Problems Using SimpleDateFormat

Apparently, I am missing something fundamental. I am having a problem formatting a jspinner value. I tried a couple of different ways and keep getting the error, did not track them, except this is due to the way I am trying to grab the value from jspinner.

Here is the counter code:

//setup date format for both spinners
SimpleDateFormat datePattern = new SimpleDateFormat("MM/dd/yyyy");
JSpinner dateFrom = new JSpinner(new SpinnerDateModel());
dateFrom.setEditor(new JSpinner.DateEditor(dateFrom, datePattern.toPattern()));
JPanel dateFromPanel = new JPanel(new GridLayout());
dateFromPanel.add(dateFrom);
dateFromPanel.setBorder(new TitledBorder("Date - From"));

This is how I am trying to get the format now:

SimpleDateFormat sdfSource = new SimpleDateFormat("MM/dd/yyyy");
Date from = sdfSource.parse(dateFrom.getValue().toString());
SimpleDateFormat sdfDestination = new SimpleDateFormat("MM/dd/yyyy");           
String dosFrom = sdfDestination.format(from);

Current error: Exception in thread "main" java.text.ParseException: Unmatched date: "Mon Oct 23 00:00:00 EDT 2006"

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4 answers

I suspect the problem is this:

dateFrom.getValue().toString()

, dateFrom.getValue() Date - , , . , , :

Date from = (Date) dateFrom.getValue();

, ... .

+4

JSpinners SpinnerDateModel JSpinner instace, Date instance JSpinner

SpinnerDateModel

enter image description here

import java.awt.*;
import java.text.SimpleDateFormat;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;

public class TimeZoneSpinners {

    private final String[] zones = {"Asia/Tokyo", "Asia/Hong_Kong",
        "Asia/Calcutta", "Europe/Paris", "Europe/London",
        "America/New_York", "America/Los_Angeles"
    };
    private final JLabel[] labels = new JLabel[zones.length];
    private final SimpleDateFormat[] formats = new SimpleDateFormat[zones.length];
    private JSpinner spinner;
    private SpinnerDateModel model;
    private SimpleDateFormat format;
    private JPanel panel;
    private JFrame frame = new JFrame();

    public void makeUI() {
        Calendar cal = Calendar.getInstance();
        Date date = cal.getTime();
        model = new SpinnerDateModel();
        model.setValue(date);
        spinner = new JSpinner(model);
        spinner.addChangeListener(new ChangeListener() {

            @Override
            public void stateChanged(ChangeEvent e) {
                Date date = (Date) ((JSpinner) e.getSource()).getValue();
                for (int i = 0; i < labels.length; i++) {
                    labels[i].setText(formats[i].format(date));
                }
            }
        });
        format = ((JSpinner.DateEditor) spinner.getEditor()).getFormat();
        format.setTimeZone(TimeZone.getTimeZone(zones[0]));
        format.applyPattern("yyyy-MM-dd HH:mm:ss");
        panel = new JPanel(new GridLayout(zones.length, 2, 10, 10));
        for (int i = 0; i < zones.length; i++) {
            formats[i] = new SimpleDateFormat("yyyy-MMM-dd HH:mm:ss");
            formats[i].setTimeZone(TimeZone.getTimeZone(zones[i]));
            JLabel label = new JLabel(zones[i]);
            labels[i] = new JLabel(formats[i].format(date));
            panel.add(label);
            panel.add(labels[i]);
        }
        frame.setLayout(new BorderLayout(10, 10));
        frame.add(spinner, BorderLayout.NORTH);
        frame.add(panel, BorderLayout.CENTER);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setVisible(true);
    }

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

            @Override
            public void run() {
                new TimeZoneSpinners().makeUI();
            }
        });
    }
}
+4

, JSpinner#getValue() Date, .

Date from = (Date) dateFrom.getValue();

The call Date.toString()always returns the date in the same default format for the current locale ("Mon Oct 23 00:00:00 ..."), so you get an exception when you try to parse it.

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You have to use

String dosFrom = sdfDestination.format((Date) dateFrom.getValue());

The problem is that dateFrom actually returns the selected date, and Date.toString () does not return the date in the format you use.

+2
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