SDate部分：
class SDate {
public static int accountDays(int year,int month) {
switch (month) {
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
return 31;
case 2:
if(isLeap(year))
return 29;
else return 28;
default:
return 30;
}
}
public static boolean isLeap(int year) {
if (year%4 == 0 && year%100 != 0)
return true;
else if (year%100 == 0 && year%400 == 0)
return true;
else
return false;
}
public static int fixDay(int year,int month) {
int base_year = 1;
int[] base_month = {0,0,3,3,6,1,4,0,3,5,0,3,5};
if (isLeap(year)) {
base_year++;
for (int i = 3; i<=6; i++) {
base_month[i] += 1;
if (base_month[i] == 7) {
base_month[i] = 0;
}
}
for (int i = 9; i <= 12; i++) {
base_month[i] += 1;
if (base_month[i] == 7) {
base_month[i] = 0;
}
}
}
return (year+year/4+year/400-year/100-base_year+base_month[month]+1)%7;
}
}
DateGrid部分：
import Javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.border.*;
import java.util.*;
public class DateGrid extends JWindow implements ActionListener {
//DateGrid的構造方法
public DateGrid() {
super();
this.design();
}
//整體布局設計：
Calendar c = Calendar.getInstance();
JPanel calendar_ym = null;
Color deepblue = new Color(19,63,164);
JButton left = new JButton("<<");
JButton right = new JButton(">>");
Label year = new Label();
Label month = new Label();
int year_now = c.get(Calendar.YEAR);
int month_now = c.get(Calendar.MONTH);
JPanel calendar_wd = null;//是caledar_week和calendar_days的總包容體
JPanel calendar_week = null;
JPanel calendar_exit = null;
JButton quit = new JButton("關閉");
Border empty = BorderFactory.createEmptyBorder();
public void design() {
calendar_ym = new JPanel(new BorderLayout());
MatteBorder m_left = BorderFactory.createMatteBorder(1, 1, 1, 0, new Color(186,223,254));
MatteBorder m_right = BorderFactory.createMatteBorder(1, 0, 1, 1, new Color(186,223,254));
JPanel l = new JPanel(new FlowLayout(FlowLayout.LEFT));
l.setBorder(m_left);
l.add(left);
left.setBorder(empty);
left.setBackground(deepblue);
left.setForeground(Color.WHITE);
left.addActionListener(this);
JPanel r = new JPanel(new FlowLayout(FlowLayout.RIGHT));
r.setBorder(m_right);
r.add(right);
right.setBorder(empty);
right.setBackground(deepblue);
right.setForeground(Color.WHITE);
right.addActionListener(this);
JPanel c = new JPanel(new FlowLayout(FlowLayout.CENTER));
c.add(year);
year.setText(String.valueOf(year_now));
c.add(new Label("/"));
c.add(month);
if (month_now == 0) {
month_now += 1;
}
month.setText(String.valueOf(month_now));
Border line = BorderFactory.createLineBorder(new Color(186,223,254));
c.setBorder(line);
l.setBackground(deepblue);
r.setBackground(deepblue);
c.setBackground(deepblue);
c.setForeground(Color.WHITE);
calendar_ym.add(l,BorderLayout.WEST);
calendar_ym.add(r,BorderLayout.EAST);
calendar_ym.add(c,BorderLayout.CENTER);
calendar_wd = new JPanel(new BorderLayout());
JPanel calendar_week = new JPanel(new GridLayout(1,7));
calendar_week.setBackground(Color.WHITE);
calendar_week.setForeground(Color.BLACK);
MatteBorder m_fix = BorderFactory.createMatteBorder(0, 1, 0, 1, Color.BLACK);
calendar_week.setBorder(m_fix);
Label sunday = new Label("日",Label.CENTER);
sunday.setForeground(Color.RED);
calendar_week.add(sunday);
calendar_week.add(new Label("一",Label.CENTER));
calendar_week.add(new Label("二",Label.CENTER));
calendar_week.add(new Label("三",Label.CENTER));
calendar_week.add(new Label("四",Label.CENTER));
calendar_week.add(new Label("五",Label.CENTER));
Label six = new Label("六",Label.CENTER);
six.setForeground(Color.green);
calendar_week.add(six);
calendar_wd.add(calendar_week,BorderLayout.NORTH);
calendar_wd.add(changeDays(),BorderLayout.CENTER);
calendar_exit = new JPanel(new FlowLayout(FlowLayout.CENTER));
calendar_exit.setBackground(Color.WHITE);
MatteBorder m_close = BorderFactory.createMatteBorder(0, 1, 1, 1, Color.BLACK);
calendar_exit.setBorder(m_close);
calendar_exit.add(quit);
quit.setBorder(empty);
quit.setBackground(Color.WHITE);
quit.setForeground(Color.BLUE);
quit.addActionListener(this);
this.setLayout(new BorderLayout());
this.add(calendar_ym,BorderLayout.NORTH);
this.add(calendar_wd,BorderLayout.CENTER);
this.add(calendar_exit,BorderLayout.SOUTH);
this.pack();
this.setLocation(
(int)this.getToolkit().getScreenSize().getWidth() - this.getWidth(),
100
);
this.setVisible(true);
}
//針對日期列的布局
JPanel calendar_days = null;
public JPanel changeDays() {
//日期列版面的基本設計：
calendar_days = new JPanel(new GridLayout(6,7));
Border line = BorderFactory.createLineBorder(Color.BLACK);
calendar_days.setBorder(line);
calendar_days.setBackground(Color.WHITE);
calendar_days.setForeground(Color.BLACK);
//日期的排列方法：
int first = SDate.fixDay(Integer.parseInt(year.getText()),Integer.parseInt(month.getText()));
int count = SDate.accountDays(Integer.parseInt(year.getText()),Integer.parseInt(month.getText()));
int days = 1;
int space_length = 0; //空白處的長度
for (int i = 0; i < 42; i++) {
if (i == first) {
count += i;
space_length = i-1;
}
if ( i>=first && i<count)
calendar_days.add(new JLabel(String.valueOf(days++),JLabel.CENTER));
else
calendar_days.add(new JLabel("")); //其他的空白處為空白表示
}
//對現在日期的標注：
c.setTimeZone(TimeZone.getTimeZone("GMT+8"));
Border b = BorderFactory.createLineBorder(Color.BLUE);
int now_day_position = space_length+c.get(Calendar.DAY_OF_YEAR);
int ym_year = Integer.parseInt(year.getText());
int ym_month = Integer.parseInt(month.getText());
int real_year = c.get(Calendar.YEAR);
int real_month = c.get(Calendar.MONTH);
if (real_month == 0) {
real_month += 1;
}
if (real_year == ym_year && real_month == ym_month) {
((JComponent)calendar_days.getComponent(now_day_position)).setBorder(b);
}
//返回當前日期列版面
return calendar_days;
}
public void actionPerformed(ActionEvent e) {
if (e.getSource() == left e.getSource() == right) {
if (e.getSource() == left) {
month_now -= 1;
if (month_now == 0) {
month_now = 12;
year_now -= 1;
month.setText(String.valueOf(month_now));
year.setText(String.valueOf(year_now));
} else {
month.setText(String.valueOf(month_now));
}
}
if (e.getSource() == right) {
month_now += 1;
if (month_now == 13) {
month_now = 1;
year_now += 1;
month.setText(String.valueOf(month_now));
year.setText(String.valueOf(year_now));
} else
month.setText(String.valueOf(month_now));
}
calendar_days.removeAll();
calendar_wd.add(changeDays());
setVisible(true);
}
if (e.getSource() == quit) {
dispose();
}
}
public static void main(String[] args) {
new DateGrid();
}
}
由於只作為例子，故寫的較為粗糙，還可以優化，並且只實現主要功能
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本文出自 “博遠至靜” 博客，請務必保留此出處http://sunspot.blog.51cto.com/372554/126810
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