MassBot1: Created page with "/** * @version 1.10 1999-10-14 * @author Cay Horstmann / import java.awt.; import java.awt.event.*; import java..."

2013-11-07T19:35:38Z

Created page with "<syntaxhighlight lang="java" line start="1" enclose="div">* * @version 1.10 1999-10-14 * @author Cay Horstmann: import java.awt.*; import java.awt.event.*; import java..."

New page

<syntaxhighlight lang="java" line start="1" enclose="div">/**
* @version 1.10 1999-10-14
* @author Cay Horstmann
*/

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

public class DateFormat00 {
public static void main(String[] args) {
JFrame frame = new DateFormatFrame();
frame.show();
}
}

class DateFormatFrame extends JFrame {
public DateFormatFrame() {
setSize(400, 200);
setTitle("DateFormat00");

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 Hashtable table = new Hashtable();
}
</syntaxhighlight>

Yurttas/PL/OOL/Java/F/05/01/05/03/DateFormat00.java - Revision history

MassBot1: Created page with "/** * @version 1.10 1999-10-14 * @author Cay Horstmann */ import java.awt.*; import java.awt.event.*; import java..."

MassBot1: Created page with "/** * @version 1.10 1999-10-14 * @author Cay Horstmann / import java.awt.; import java.awt.event.*; import java..."