图片说明
package ceshi;
/**
- Created by Administrator on 2017/4/26 0026. / import java.awt.; import java.awt.event.*;
import java.text.*;
import java.util.*;
import javax.swing.*;
public class DateFormatTest {
public static void main(String args[])
{
JFrame frame=new DateFormatFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.show();
}
}
class DateFormatFrame extends JFrame
{
public DateFormatFrame()
{
setSize(WIDTH,HEIGHT);
setTitle("DateFormatTest");
getContentPane().setLayout(new GridBagLayout());
GridBagConstraints gbc=new GridBagConstraints();
gbc.fill=GridBagConstraints.NONE;
gbc.anchor=GridBagConstraints.EAST;
add(new JLabel("Local"),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);
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() {
@Override
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);
private static final int WIDTH=400;
private static final int HEIGHT=200;
class EnumCombo extends JComboBox
{
public EnumCombo(Class c1,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=c1.getField(name);
value=f.getInt(c1);
}
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();
}
}!
