Java calendar Coding

// Jcalendar. java

Import java. awt. BorderLayout;

Import java. awt. Color;
Import java. awt. Dimension;
Import java. awt. GridLayout;
Import java. awt. SystemColor;
Import java. awt. event. ActionEvent;
Import java. awt. event. KeyEvent;
Import java. awt. event. MouseEvent;
Import java. util. Calendar;
Import java. util. GregorianCalendar;
Import java. util. Locale;
Import java. util. Date;
Import java. util. StringTokenizer;

Import javax. swing. BorderFactory;
Import javax. swing. JButton;
Import javax. swing. JFrame;
Import javax. swing. JLabel;
Import javax. swing. JPanel;
Import javax. swing. JTextField;
Import javax. swing. JToggleButton;
Import javax. swing. SwingConstants;
Import javax. swing. UIManager;

/**
* <P> Title: Swing calendar </p>
* <P> Description: operation date </p>
* @ Author duxu2004
* @ Version 1.0.1
*/

Class JCalendar extends JPanel {
// Dynamically represents the year, month, and day
Private int year = 0;
Private int month = 0;
Private int day = 0;
// Main panel
Private JPanel Main = new JPanel ();
// Daily panel
Private JPanel jPanelDay = new JPanel ();
// Monthly panel
Private JPanel jPanelMonth = new JPanel ();
// Year input location
Private JTextField Year = new JTextField ();
// Input location of the month
Private JTextField Month = new JTextField ();
// Reduce the month
Private JButton MonthDown = new JButton ();
// Add a month
Private JButton MonthUp = new JButton ();

Private JPanel jPanelButton = new JPanel ();
// Reduce the year
Private JButton YearDown = new JButton ();
// Add year
Private JButton YearUp = new JButton ();
// Display the date position
Private JLabel Out = new JLabel ();
// China time zone. You can extend the time zone setting function from here.
Private Locale l = Locale. CHINESE;
// Main Calendar
Private GregorianCalendar cal = new GregorianCalendar (l );
// Weekly panel
Private JPanel weekPanel = new JPanel ();
// Day button group
Private JToggleButton [] days = new JToggleButton [42];
// Day panel
Private JPanel Days = new JPanel ();
// Mark
Private JLabel jLabel1 = new JLabel ();
Private JLabel jLabel2 = new JLabel ();
Private JLabel jLabel3 = new JLabel ();
Private JLabel jLabel4 = new JLabel ();
Private JLabel jLabel5 = new JLabel ();
Private JLabel jLabel6 = new JLabel ();
Private JLabel jLabel7 = new JLabel ();
// The number of days selected
Private JToggleButton cur = null;
// Array of the number of days of the month, used to obtain the number of days of the month
// 1 2 3 4 5 6 7 8 9 10 11 12
Private int [] mm = {, 30, 31 };

// Empty date Constructor
Public JCalendar (){
Try {
JbInit ();
}
Catch (Exception e ){
E. printStackTrace ();
}

}
// Constructor with Date settings
Public JCalendar (int year, int month, int day ){
Cal. set (year, month, day );
Try {
JbInit ();
}
Catch (Exception e ){
E. printStackTrace ();
}
}
// Constructor with calendar Input
Public JCalendar (GregorianCalendar calendar ){
Cal = calendar;
Try {
JbInit ();
}
Catch (Exception e ){
E. printStackTrace ();
}
}
// Constructor with Date input
Public JCalendar (Date date ){
Cal. setTime (date );
Try {
JbInit ();
}
Catch (Exception e ){
E. printStackTrace ();
}
}
// Initialize the component
Private void jbInit () throws Exception {
// Initialize year, month, and day
IniCalender ();

This. setLayout (new BorderLayout ());
This. setBorder (BorderFactory. createRaisedBevelBorder ());
This. setMaximumSize (new Dimensions (200,200 ));
This. setMinimumSize (new Dimension (200,200 ));
This. setPreferredSize (new Dimension (200,200 ));

Main. setLayout (new BorderLayout ());
Main. setBackground (SystemColor.info );
Main. setBorder (null );

Out. setBackground (Color. lightGray );
Out. setHorizontalAlignment (SwingConstants. CENTER );
Out. setMaximumSize (new Dimension (100, 19 ));
Out. setMinimumSize (new Dimension (100, 19 ));
Out. setPreferredSize (new Dimension (100, 19 ));

JLabel1.setForeground (Color. red );
JLabel1.setHorizontalAlignment (SwingConstants. CENTER );
JLabel1.setHorizontalTextPosition (SwingConstants. CENTER );
JLabel1.setText ("day ");
JLabel2.setForeground (Color. blue );
JLabel2.setHorizontalAlignment (SwingConstants. CENTER );
JLabel2.setHorizontalTextPosition (SwingConstants. CENTER );
JLabel2.setText ("6 ");
JLabel3.setHorizontalAlignment (SwingConstants. CENTER );
JLabel3.setHorizontalTextPosition (SwingConstants. CENTER );
JLabel3.setText ("5 ");
JLabel4.setHorizontalAlignment (SwingConstants. CENTER );
JLabel4.setHorizontalTextPosition (SwingConstants. CENTER );
JLabel4.setText ("4 ");
JLabel5.setHorizontalAlignment (SwingConstants. CENTER );
JLabel5.setHorizontalTextPosition (SwingConstants. CENTER );
JLabel5.setText ("3 ");
JLabel6.setBorder (null );
JLabel6.setHorizontalAlignment (SwingConstants. CENTER );
JLabel6.setHorizontalTextPosition (SwingConstants. CENTER );
JLabel6.setText ("2 ");
JLabel7.setBackground (Color. lightGray );
JLabel7.setForeground (Color. black );
JLabel7.setBorder (null );
JLabel7.setHorizontalAlignment (SwingConstants. CENTER );
JLabel7.setHorizontalTextPosition (SwingConstants. CENTER );
JLabel7.setText ("1 ");

WeekPanel. setBackground (UIManager. getColor ("InternalFrame. activeTitleGradient "));
WeekPanel. setBorder (BorderFactory. createEtchedBorder ());
WeekPanel. setLayout (new GridLayout (1, 7 ));
WeekPanel. add (jLabel1, null );
WeekPanel. add (jLabel7, null );
WeekPanel. add (jLabel6, null );
WeekPanel. add (jLabel5, null );
WeekPanel. add (jLabel4, null );
WeekPanel. add (jLabel3, null );
WeekPanel. add (jLabel2, null );

MonthUp. setAlignmentX (float) 0.0 );
MonthUp. setActionMap (null );

JPanelMonth. setBackground (SystemColor.info );
JPanelMonth. setLayout (new BorderLayout ());
JPanelMonth. setBorder (BorderFactory. createEtchedBorder ());

Month. setBorder (null );
Month. setHorizontalAlignment (SwingConstants. CENTER );
Month. addMouseListener (new java. awt. event. MouseAdapter (){
Public void mouseClicked (MouseEvent e ){
Month_mouseClicked (e );
}
});
Month. addKeyListener (new java. awt. event. KeyAdapter (){
Public void keyPressed (KeyEvent e ){
Month_keyPressed (e );
}
});

MonthDown. setBorder (null );
MonthDown. setText ("\ u25C4 ");
MonthDown. addActionListener (new java. awt. event. ActionListener (){
Public void actionreceivmed (ActionEvent e ){
Monthdown_actionreceivmed (e );
}
});
MonthUp. setBorder (null );
MonthUp. setText ("\ u25BA ");
MonthUp. addActionListener (new java. awt. event. ActionListener (){
Public void actionreceivmed (ActionEvent e ){
Monthup_actionreceivmed (e );
}
});

JPanelButton. setLayout (null );
JPanelButton. setBorder (null );
JPanelButton. addComponentListener (new java. awt. event. ComponentAdapter (){
Public void componentResized (java. awt. event. ComponentEvent evt ){
JPanelButtonComponentResized (evt );
}
});

Year. setBorder (BorderFactory. createEtchedBorder ());
Year. setMaximumSize (new Dimension (80, 25 ));
Year. setMinimumSize (new Dimension (80, 25 ));
Year. setPreferredSize (new Dimension (80, 25 ));
Year. setHorizontalAlignment (SwingConstants. CENTER );
Year. addMouseListener (new java. awt. event. MouseAdapter (){
Public void mouseClicked (MouseEvent e ){
Year_mouseClicked (e );
}
});
Year. addKeyListener (new java. awt. event. KeyAdapter (){
Public void keyPressed (KeyEvent e ){
Year_keyPressed (e );
}
});

YearDown. setBorder (null );
YearDown. setMaximumSize (new Dimension (16, 16 ));
YearDown. setMinimumSize (new Dimension (16, 16 ));
YearDown. setPreferredSize (new Dimension (16, 16 ));
YearDown. setSize (new Dimension (16, 16 ));
YearDown. setText ("success ");
YearDown. addActionListener (new java. awt. event. ActionListener (){
Public void actionreceivmed (ActionEvent e ){
Yeardown_actionreceivmed (e );
}
});
YearUp. setBorder (null );
YearUp. setMaximumSize (new Dimension (16, 16 ));
YearUp. setMinimumSize (new Dimension (16, 16 ));
YearUp. setPreferredSize (new Dimension (16, 16 ));
YearUp. setSize (new Dimension (16, 16 ));
YearUp. setText ("▲ ");
YearUp. addActionListener (new java. awt. event. ActionListener (){
Public void actionreceivmed (ActionEvent e ){
Yearup_actionreceivmed (e );
}
});

JPanelDay. setLayout (new BorderLayout ());

Days. setLayout (new GridLayout (6, 7 ));
Days. setBackground (SystemColor.info );

For (int I = 0; I <42; I ++ ){
Days [I] = new JToggleButton ();
Days [I]. setBorder (null );
Days [I]. setBackground (SystemColor.info );
Days [I]. setHorizontalAlignment (SwingConstants. CENTER );
Days [I]. setHorizontalTextPosition (SwingConstants. CENTER );
// Days [I]. setSize (l, l );
Days [I]. addActionListener (new java. awt. event. ActionListener (){
Public void actionreceivmed (ActionEvent e ){
Day = Integer. parseInt (JToggleButton) e. getSource (). getText ());
ShowDate ();
ShowDays ();
}
});
Days. add (days [I]);
}

This. add (Main, BorderLayout. NORTH );
This. add (jPanelDay, BorderLayout. CENTER );
This. add (jPanelMonth, BorderLayout. SOUTH );

Main. add (Year, BorderLayout. CENTER );
Main. add (Out, BorderLayout. WEST );
Main. add (jPanelButton, BorderLayout. EAST );

JPanelButton. add (YearUp );
JPanelButton. add (YearDown );

JPanelDay. add (weekPanel, BorderLayout. NORTH );
JPanelDay. add (Days, BorderLayout. CENTER );

JPanelMonth. add (Month, BorderLayout. CENTER );
JPanelMonth. add (MonthDown, BorderLayout. WEST );
JPanelMonth. add (MonthUp, BorderLayout. EAST );

ShowMonth ();
ShowYear ();
ShowDate ();
ShowDays ();
}

// Customize the year Selection Panel
Void jPanelButtonComponentResized (java. awt. event. ComponentEvent evt ){
YearUp. setLocation (0, 0 );
YearDown. setLocation (0, YearUp. getHeight ());
JPanelButton. setSize (YearUp. getWidth (), YearUp. getHeight () * 2 );
JPanelButton. setPreferredSize (new Dimension (YearUp. getWidth (), YearUp. getHeight () * 2 ));
JPanelButton. updateUI ();
}

// For testing
Public static void main (String [] args ){
JFrame f = new JFrame ();
F. setContentPane (new JCalendar ());
F. pack ();
// F. setResizable (false );
F. show ();
}

// Add year
Void yearup_actionreceivmed (ActionEvent e ){
Year ++;
ShowYear ();
ShowDate ();
ShowDays ();
}

// Reduce the year
Void yeardown_actionreceivmed (ActionEvent e ){
Year --;
ShowYear ();
ShowDate ();
ShowDays ();
}

// Reduce the month
Void monthdown_actionreceivmed (ActionEvent e ){
Month --;
If (month <0 ){
Month = 11;
Year --;
ShowYear ();
}
ShowMonth ();
ShowDate ();
ShowDays ();
}

// Add a month
Void monthup_actionreceivmed (ActionEvent e ){
Month ++;
If (month = 12 ){
Month = 0;
Year ++;
ShowYear ();
}
ShowMonth ();
ShowDate ();
ShowDays ();
}

// Initialize year, month, and day
Void iniCalender (){
Year = cal. get (Calendar. YEAR );
Month = cal. get (Calendar. MONTH );
Day = cal. get (Calendar. DAY_OF_MONTH );
}

// Refresh the month
Void showMonth (){
Month. setText (Integer. toString (month + 1) + "Month ");
}

// Refresh year
Void showYear (){
Year. setText (Integer. toString (year) + "Year ");
}

// Refresh date
Void showDate (){
Out. setText (Integer. toString (year) + "-" + Integer. toString (month + 1) + "-" + Integer. toString (day ));
}

// Select the number of days for re-painting.
Void showDays (){
Cal. set (year, month, 1 );
Int firstDayOfWeek = cal. get (Calendar. DAY_OF_WEEK );
Int n = mm [month];
If (cal. isLeapYear (year) & month = 1) n ++;
Int I = 0;
For (; I <firstDayOfWeek-1; I ++ ){
Days [I]. setEnabled (false );
Days [I]. setSelected (false );
Days [I]. setText ("");
}
Int d = 1;
For (; d <= n; d ++ ){
Days [I]. setText (Integer. toString (d ));
Days [I]. setEnabled (true );
If (d = day) days [I]. setSelected (true );
Else days [I]. setSelected (false );;
I ++;
}
For (; I <42; I ++ ){
Days [I]. setEnabled (false );
Days [I]. setSelected (false );
Days [I]. setText ("");
}
}

// Click the year panel to select the entire year string
Void SelectionYear (){
Year. setSelectionStart (0 );
Year. setSelectionEnd (Year. getText (). length ());
}

// Click the month panel to select the entire month string
Void SelectionMonth (){
Month. setSelectionStart (0 );
Month. setSelectionEnd (Month. getText (). length ());
}

// The month panel responds to the mouse-Click Event
Void Month_mouseClicked (MouseEvent e ){
// SelectionMonth ();
InputMonth ();
}

// Check the input month
Void inputMonth (){
String s;
If (Month. getText (). endsWith ("Month "))
{
S = Month. getText (). substring (0, Month. getText (). length ()-1 );
}
Else s = Month. getText ();
Month = Integer. parseInt (s)-1;
This. showMe ();
}

// Response to the keyboard hitting event on the month panel
Void Month_keyPressed (KeyEvent e ){
If (e. getKeyChar () = 10)
InputMonth ();
}

// The year panel responds to the mouse click event
Void Year_mouseClicked (MouseEvent e ){
// SelectionYear ();
InputYear ();
}

// Year keyboard strike Event Response
Void Year_keyPressed (KeyEvent e ){
// System. out. print (new Integer (e. getKeyChar (). byteValue ());
If (e. getKeyChar () = 10)
InputYear ();
}

// Check the input year string
Void inputYear (){
String s;
If (Year. getText (). endsWith ("Year "))
{
S = Year. getText (). substring (0, Year. getText (). length ()-1 );
}
Else s = Year. getText ();
Year = Integer. parseInt (s );
This. showMe ();
}

// Returns the date in string format, yyyy-mm-dd
Public String getDate () {return Out. getText ();}

// Enter the date in string format, yyyy-mm-dd
Public void setDate (String date ){
If (date! = Null ){
StringTokenizer f = new StringTokenizer (date ,"-");
If (f. hasMoreTokens ())
Year = Integer. parseInt (f. nextToken ());
If (f. hasMoreTokens ())
Month = Integer. parseInt (f. nextToken ());
If (f. hasMoreTokens ())
Day = Integer. parseInt (f. nextToken ());
Cal. set (year, month, day );
}
This. showMe ();
}

// Enter a date as a date object
Public void setTime (Date date ){
Cal. setTime (date );
This. iniCalender ();
This. showMe ();
}

// Returns the date object.
Public Date getTime () {return cal. getTime ();}

// Returns the current day
Public int getDay (){
Return day;
}

// Set the current day
Public void setDay (int day ){
This. day = day;
Cal. set (this. year, this. month, this. day );
This. showMe ();
}

// Set the current year
Public void setYear (int year ){
This. year = year;
Cal. set (this. year, this. month, this. day );
This. showMe ();
}

// Returns the current year.
Public int getYear (){
Return year;
}

// Returns the current month.
Public int getMonth (){
Return month;
}

// Set the current month
Public void setMonth (int month ){
This. month = month;
Cal. set (this. year, this. month, this. day );
This. showMe ();
}

// Refresh
Public void showMe (){
This. showDays ();
This. showMonth ();
This. showYear ();
This. showDate ();
}
}

Test code

JFrame f = new JFrame ();
F. setContentPane (new JCalendar ());
F. pack ();
// F. setResizable (false );
// F. show ();
F. setVisible (true );