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/**
* @version 1.10 1999-10-14
* @author Cay Horstmann
*/
import java.awt.Component;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.text.DateFormat;
import java.text.ParseException;
import java.util.Date;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;
public class DateFormatTest {
public static void main(String[] args) {
JFrame frame = new DateFormatFrame();
frame.show();
}
}
class DateFormatFrame extends JFrame {
public DateFormatFrame() {
setSize(400, 200);
setTitle("DateFormatTest");
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
getContentPane().setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.fill = GridBagConstraints.NONE;
gbc.anchor = GridBagConstraints.EAST;
add(new JLabel("Locale"), gbc, 0, 0, 1, 1);
add(new JLabel("Date style"), gbc, 0, 1, 1, 1);
add(new JLabel("Time style"), gbc, 2, 1, 1, 1);
add(new JLabel("Date"), gbc, 0, 2, 1, 1);
add(new JLabel("Time"), gbc, 0, 3, 1, 1);
gbc.anchor = GridBagConstraints.WEST;
add(localeCombo, gbc, 1, 0, 2, 1);
add(dateStyleCombo, gbc, 1, 1, 1, 1);
add(timeStyleCombo, gbc, 3, 1, 1, 1);
add(dateParseButton, gbc, 3, 2, 1, 1);
add(timeParseButton, gbc, 3, 3, 1, 1);
add(lenientCheckbox, gbc, 0, 4, 2, 1);
gbc.fill = GridBagConstraints.HORIZONTAL;
add(dateText, gbc, 1, 2, 2, 1);
add(timeText, gbc, 1, 3, 2, 1);
locales = DateFormat.getAvailableLocales();
for (int i = 0; i < locales.length; i++)
localeCombo.addItem(locales[i].getDisplayName());
localeCombo.setSelectedItem(Locale.getDefault().getDisplayName());
currentDate = new Date();
currentTime = new Date();
updateDisplay();
ActionListener listener = new ActionListener() {
public void actionPerformed(ActionEvent event) {
updateDisplay();
}
};
localeCombo.addActionListener(listener);
dateStyleCombo.addActionListener(listener);
timeStyleCombo.addActionListener(listener);
dateParseButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
String d = dateText.getText();
try {
currentDateFormat.setLenient(lenientCheckbox.isSelected());
Date date = currentDateFormat.parse(d);
currentDate = date;
updateDisplay();
} catch (ParseException e) {
dateText.setText("Parse error: " + d);
} catch (IllegalArgumentException e) {
dateText.setText("Argument error: " + d);
}
}
});
timeParseButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
String t = timeText.getText();
try {
currentDateFormat.setLenient(lenientCheckbox.isSelected());
Date date = currentTimeFormat.parse(t);
currentTime = date;
updateDisplay();
} catch (ParseException e) {
timeText.setText("Parse error: " + t);
} catch (IllegalArgumentException e) {
timeText.setText("Argument error: " + t);
}
}
});
}
public void add(Component c, GridBagConstraints gbc, int x, int y, int w,
int h) {
gbc.gridx = x;
gbc.gridy = y;
gbc.gridwidth = w;
gbc.gridheight = h;
getContentPane().add(c, gbc);
}
public void updateDisplay() {
Locale currentLocale = locales[localeCombo.getSelectedIndex()];
int dateStyle = dateStyleCombo.getValue();
currentDateFormat = DateFormat
.getDateInstance(dateStyle, currentLocale);
String d = currentDateFormat.format(currentDate);
dateText.setText(d);
int timeStyle = timeStyleCombo.getValue();
currentTimeFormat = DateFormat
.getTimeInstance(timeStyle, currentLocale);
String t = currentTimeFormat.format(currentTime);
timeText.setText(t);
}
private Locale[] locales;
private Date currentDate;
private Date currentTime;
private DateFormat currentDateFormat;
private DateFormat currentTimeFormat;
private JComboBox localeCombo = new JComboBox();
private EnumCombo dateStyleCombo = new EnumCombo(DateFormat.class,
new String[] { "Default", "Full", "Long", "Medium", "Short" });
private EnumCombo timeStyleCombo = new EnumCombo(DateFormat.class,
new String[] { "Default", "Full", "Long", "Medium", "Short" });
private JButton dateParseButton = new JButton("Parse date");
private JButton timeParseButton = new JButton("Parse time");
private JTextField dateText = new JTextField(30);
private JTextField timeText = new JTextField(30);
private JTextField parseText = new JTextField(30);
private JCheckBox lenientCheckbox = new JCheckBox("Parse lenient", true);
}
class EnumCombo extends JComboBox {
public EnumCombo(Class cl, String[] labels) {
for (int i = 0; i < labels.length; i++) {
String label = labels[i];
String name = label.toUpperCase().replace(' ', '_');
int value = 0;
try {
java.lang.reflect.Field f = cl.getField(name);
value = f.getInt(cl);
} catch (Exception e) {
label = "(" + label + ")";
}
table.put(label, new Integer(value));
addItem(label);
}
setSelectedItem(labels[0]);
}
public int getValue() {
return ((Integer) table.get(getSelectedItem())).intValue();
}
private Map table = new HashMap();
}
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