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以下是两个类，请楼主分别存成两个java文件:
前锋网站制作公司哪家好，找创新互联！从网页设计、网站建设、微信开发、APP开发、成都响应式网站建设公司等网站项目制作，到程序开发，运营维护。创新互联自2013年起到现在10年的时间，我们拥有了丰富的建站经验和运维经验，来保证我们的工作的顺利进行。专注于网站建设就选创新互联。
其中
MainFrame.java是显示日历程序，Clock.java是日历计算程序。编译后运行MainFrame这个类即可。
1.MainFrame.java
---
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Date;
import java.util.Calendar;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class MainFrame extends JFrame {
/** *//**
*
*/
private static final long serialVersionUID = 1L;
JPanel panel = new JPanel(new BorderLayout());
JPanel panel1 = new JPanel();
JPanel panel2 = new JPanel(new GridLayout(7, 7));
JPanel panel3 = new JPanel();
JLabel[] label = new JLabel[49];
JLabel y_label = new JLabel("年份");
JLabel m_label = new JLabel("月份");
JComboBox com1 = new JComboBox();
JComboBox com2 = new JComboBox();
int re_year, re_month;
int x_size, y_size;
String year_num;
Calendar now = Calendar.getInstance(); // 实例化Calendar
MainFrame() {
super("万年历");
setSize(300, 350);
x_size = (int) (Toolkit.getDefaultToolkit().getScreenSize().getWidth());
y_size = (int) (Toolkit.getDefaultToolkit().getScreenSize().getHeight());
setLocation((x_size - 300) / 2, (y_size - 350) / 2);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
panel1.add(y_label);
panel1.add(com1);
panel1.add(m_label);
panel1.add(com2);
for (int i = 0; i 49; i++) {
label[i] = new JLabel("", JLabel.CENTER);// 将显示的字符设置为居中
panel2.add(label[i]);
}
panel3.add(new Clock(this));
panel.add(panel1, BorderLayout.NORTH);
panel.add(panel2, BorderLayout.CENTER);
panel.add(panel3, BorderLayout.SOUTH);
panel.setBackground(Color.white);
panel1.setBackground(Color.white);
panel2.setBackground(Color.white);
panel3.setBackground(Color.white);
Init();
com1.addActionListener(new ClockAction());
com2.addActionListener(new ClockAction());
setContentPane(panel);
setVisible(true);
setResizable(false);
}
class ClockAction implements ActionListener {
public void actionPerformed(ActionEvent arg0) {
int c_year, c_month, c_week;
c_year = Integer.parseInt(com1.getSelectedItem().toString()); // 得到当前所选年份
c_month = Integer.parseInt(com2.getSelectedItem().toString()) - 1; // 得到当前月份，并减1,计算机中的月为0－11
c_week = use(c_year, c_month); // 调用函数use，得到星期几
Resetday(c_week, c_year, c_month); // 调用函数Resetday
}
}
public void Init() {
int year, month_num, first_day_num;
String log[] = { "日", "一", "二", "三", "四", "五", "六" };
for (int i = 0; i 7; i++) {
label[i].setText(log[i]);
}
for (int i = 0; i 49; i = i + 7) {
label[i].setForeground(Color.red); // 将星期日的日期设置为红色
}
for (int i = 6; i 49; i = i + 7) {
label[i].setForeground(Color.green);// 将星期六的日期设置为绿色
}
for (int i = 1; i 10000; i++) {
com1.addItem("" + i);
}
for (int i = 1; i 13; i++) {
com2.addItem("" + i);
}
month_num = (int) (now.get(Calendar.MONTH)); // 得到当前时间的月份
year = (int) (now.get(Calendar.YEAR)); // 得到当前时间的年份
com1.setSelectedIndex(year - 1); // 设置下拉列表显示为当前年
com2.setSelectedIndex(month_num); // 设置下拉列表显示为当前月
first_day_num = use(year, month_num);
Resetday(first_day_num, year, month_num);
}
public int use(int reyear, int remonth) {
int week_num;
now.set(reyear, remonth, 1); // 设置时间为所要查询的年月的第一天
week_num = (int) (now.get(Calendar.DAY_OF_WEEK));// 得到第一天的星期
return week_num;
}
@SuppressWarnings("deprecation")
public void Resetday(int week_log, int year_log, int month_log) {
int month_day_score; // 存储月份的天数
int count;
month_day_score = 0;
count = 1;
Date date = new Date(year_log, month_log + 1, 1); // now
Calendar cal = Calendar.getInstance();
cal.setTime(date);
cal.add(Calendar.MONTH, -1); // 前个月
month_day_score = cal.getActualMaximum(Calendar.DAY_OF_MONTH);// 最后一天
for (int i = 7; i 49; i++) { // 初始化标签
label[i].setText("");
}
week_log = week_log + 6; // 将星期数加6，使显示正确
month_day_score = month_day_score + week_log;
for (int i = week_log; i month_day_score; i++, count++) {
label[i].setText(count + "");
}
}
public static void main(String[] args) {
JFrame.setDefaultLookAndFeelDecorated(true);
new MainFrame();
}
}
2.Clock.java
-----
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Date;
import java.util.Calendar;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
//显示时间的类：Clock
/** *//**
* Clock.java
* Summary 数字时间显示
* Created on
* @author
* remark
*/
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.text.SimpleDateFormat;
import java.util.Calendar;
class Clock extends Canvas implements Runnable{
/** *//**
*
*/
private static final long serialVersionUID = 3660124045489727166L;
MainFrame mf;
Thread t;
String time;
public Clock(MainFrame mf){
this.mf=mf;
setSize(280,40);
setBackground(Color.white);
t=new Thread(this); //实例化线程
t.start(); //调用线程
}
public void run(){
while(true){
try{
Thread.sleep(1000); //休眠1秒钟
}catch(InterruptedException e){
System.out.println("异常");
}
this.repaint(100);
}
}
public void paint(Graphics g){
Font f=new Font("宋体",Font.BOLD,16);
SimpleDateFormat SDF=new SimpleDateFormat("yyyy'年'MM'月'dd'日'HH:mm:ss");//格式化时间显示类型
Calendar now=Calendar.getInstance();
time=SDF.format(now.getTime()); //得到当前日期和时间
g.setFont(f);
g.setColor(Color.orange);
g.drawString(time,45,25);
}
}
首先，控制台输入肯定要是形如2013-03-06这样的格式，这是SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-DD")所要求的。输入2013-03会进入异常处理提示输入格式不正确。至于打印日历，你可以算出该月的第一号是星期几，然后按顺序排下去，满7天换行就是了
详细代码
//CalendarWindow类：
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
public class CalendarWindow extends JFrame implements ActionListener,
MouseListener,FocusListener{
int year,month,day;
CalendarMessage calendarMessage;
CalendarPad calendarPad;
NotePad notePad;
JTextField showYear,showMonth;
JTextField [] showDay;
CalendarImage calendarImage;
Clock clock;
JButton nextYear,previousYear,nextMonth,previousMonth;
JButton saveDailyRecord,deleteDailyRecord,readDailyRecord;
File dir;
Color backColor=Color.gray;
public CalendarWindow(){
dir=new File("./dailyRecord");
dir.mkdir();
showDay=new JTextField[42];
for(int i=0;ishowDay.length;i++){
showDay[i]=new JTextField();
showDay[i].setBackground(backColor);
showDay[i].setLayout(new GridLayout(3,3));
showDay[i].addMouseListener(this);
showDay[i].addFocusListener(this);
}
calendarMessage=new CalendarMessage();
calendarPad=new CalendarPad();
notePad=new NotePad();
Calendar calendar=Calendar.getInstance();
calendar.setTime(new Date());
year=calendar.get(Calendar.YEAR);
month=calendar.get(Calendar.MONTH)+1;
day=calendar.get(Calendar.DAY_OF_MONTH);
calendarMessage.setYear(year);
calendarMessage.setMonth(month);
calendarMessage.setDay(day);
calendarPad.setCalendarMessage(calendarMessage);
calendarPad.setShowDayTextField(showDay);
notePad.setShowMessage(year,month,day);
calendarPad.showMonthCalendar();
doMark(); //给有日志的号码做标记,见后面的doMark()方法
calendarImage=new CalendarImage();
calendarImage.setImageFile(new File("sea.jpg"));
clock=new Clock();
JSplitPane splitV1=
new JSplitPane(JSplitPane.VERTICAL_SPLIT,calendarPad,calendarImage);
JSplitPane splitV2=
new JSplitPane(JSplitPane.VERTICAL_SPLIT,notePad,clock);
JSplitPane splitH=new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,splitV1,splitV2);
add(splitH,BorderLayout.CENTER);
showYear=new JTextField(""+year,6);
showYear.setFont(new Font("TimesRoman",Font.BOLD,12));
showYear.setHorizontalAlignment(JTextField.CENTER);
showMonth=new JTextField(" "+month,4);
showMonth.setFont(new Font("TimesRoman",Font.BOLD,12));
showMonth.setHorizontalAlignment(JTextField.CENTER);
nextYear=new JButton("下年");
previousYear=new JButton("上年");
nextMonth=new JButton("下月");
previousMonth=new JButton("上月");
nextYear.addActionListener(this);
previousYear.addActionListener(this);
nextMonth.addActionListener(this);
previousMonth.addActionListener(this);
showYear.addActionListener(this);
JPanel north=new JPanel();
north.add(previousYear);
north.add(showYear);
north.add(nextYear);
north.add(previousMonth);
north.add(showMonth);
north.add(nextMonth);
add(north,BorderLayout.NORTH);
saveDailyRecord=new JButton("保存日志") ;
deleteDailyRecord=new JButton("删除日志");
readDailyRecord=new JButton("读取日志");
saveDailyRecord.addActionListener(this);
deleteDailyRecord.addActionListener(this);
readDailyRecord.addActionListener(this);
JPanel pSouth=new JPanel();
pSouth.add(saveDailyRecord);
pSouth.add(deleteDailyRecord);
pSouth.add(readDailyRecord);
add(pSouth,BorderLayout.SOUTH);
setVisible(true);//根据参数 b 的值显示或隐藏此 Window
setBounds(60,60,660,480);
validate();//验证此容器及其所有子组件
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //设置用户在此窗体上发起 "close" 时默认执行的操作
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==nextYear){
year++;
showYear.setText(""+year);
calendarMessage.setYear(year);
calendarPad.setCalendarMessage(calendarMessage);
calendarPad.showMonthCalendar();
notePad.setShowMessage(year,month,day);
doMark();
}
else if(e.getSource()==previousYear){
year--;
showYear.setText(""+year);
calendarMessage.setYear(year);
calendarPad.setCalendarMessage(calendarMessage);
calendarPad.showMonthCalendar();
notePad.setShowMessage(year,month,day);
doMark();
}
else if(e.getSource()==nextMonth){
month++;
if(month12) month=1;
showMonth.setText(" "+month);
calendarMessage.setMonth(month);
calendarPad.setCalendarMessage(calendarMessage);
calendarPad.showMonthCalendar();
notePad.setShowMessage(year,month,day);
doMark();
}
else if(e.getSource()==previousMonth){
month--;
if(month1) month=12;
showMonth.setText(" "+month);
calendarMessage.setMonth(month);
calendarPad.setCalendarMessage(calendarMessage);
calendarPad.showMonthCalendar();
notePad.setShowMessage(year,month,day);
doMark();
}
else if(e.getSource()==showYear){
String s=showYear.getText().trim();
char a[]=s.toCharArray();
boolean boo=false;
for(int i=0;ia.length;i++)
if(!(Character.isDigit(a[i])))
boo=true;
if(boo==true) //弹出“警告”消息对话框
JOptionPane.showMessageDialog(this,"您输入了非法年份","警告", JOptionPane.WARNING_MESSAGE);
else if(boo==false)
year=Integer.parseInt(s);
showYear.setText(""+year);
calendarMessage.setYear(year);
calendarPad.setCalendarMessage(calendarMessage);
calendarPad.showMonthCalendar();
notePad.setShowMessage(year,month,day);
doMark();
}
else if(e.getSource()==saveDailyRecord){
notePad.save(dir,year,month,day);
doMark();
}
else if(e.getSource()==deleteDailyRecord){
notePad.delete(dir,year,month,day);
doMark();
}
else if(e.getSource()==readDailyRecord)
notePad.read(dir,year,month,day);
}
public void mousePressed(MouseEvent e){
JTextField text=(JTextField)e.getSource();
String str=text.getText().trim();
try{ day=Integer.parseInt(str);
}
catch(NumberFormatException exp){
}
calendarMessage.setDay(day);
notePad.setShowMessage(year,month,day);
}
public void mouseReleased(MouseEvent e){}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
public void mouseClicked(MouseEvent e) {}
public void focusGained(FocusEvent e){
Component com=(Component)e.getSource();
com.setBackground(Color.red);
}
public void focusLost(FocusEvent e){
Component com=(Component)e.getSource();
com.setBackground(backColor);
}
public void doMark(){
for(int i=0;ishowDay.length;i++){
showDay[i].removeAll();
String str=showDay[i].getText().trim();
try{
int n=Integer.parseInt(str);
if(isHaveDailyRecord(n)==true){ //见后面的isHaveDailyRecord()方法
JLabel mess=new JLabel("存");
mess.setFont(new Font("TimesRoman",Font.PLAIN,11));
mess.setForeground(Color.black) ;
showDay[i].add(mess);
} }
catch(Exception exp){}
}
calendarPad.repaint();
calendarPad.validate();
}
public boolean isHaveDailyRecord(int n){
String key=""+year+""+month+""+n;
String [] dayFile=dir.list();
boolean boo=false;
for(int k=0;kdayFile.length;k++){
if(dayFile[k].equals(key+".txt")){
boo=true;
break;
} }
return boo;
}
public static void main(String args[]){
new CalendarWindow();
}
}
//CalendarPad类：
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class CalendarPad extends JPanel{
int year,month,day;
CalendarMessage calendarMessage;
JTextField [] showDay;
JLabel title[];
String [] 星期={"SUN/日","MON/一","TUE/二","WED/三","THU/四","FRI/五","SAT/六"};
JPanel north,center;
public CalendarPad(){
setLayout(new BorderLayout());
north=new JPanel();
north.setLayout(new GridLayout(1,7));
center=new JPanel();
center.setLayout(new GridLayout(6,7));
add(center,BorderLayout.CENTER);
add(north,BorderLayout.NORTH);
title=new JLabel[7];
for(int j=0;j7;j++){
title[j]=new JLabel();
title[j].setFont(new Font("TimesRoman",Font.BOLD,12));
title[j].setText(星期[j]);
title[j].setHorizontalAlignment(JLabel.CENTER);
title[j].setBorder(BorderFactory.createRaisedBevelBorder());
north.add(title[j]);
}
title[0].setForeground(Color.red);
title[6].setForeground(Color.blue);
}
public void setShowDayTextField(JTextField [] text){
showDay=text;
for(int i=0;ishowDay.length;i++){
showDay[i].setFont(new Font("TimesRoman",Font.BOLD,15));
showDay[i].setHorizontalAlignment(JTextField.CENTER);
showDay[i].setEditable(false);
center.add(showDay[i]);
}
}
public void setCalendarMessage(CalendarMessage calendarMessage){
this.calendarMessage=calendarMessage;
}
public void showMonthCalendar(){
String [] a=calendarMessage.getMonthCalendar();
for(int i=0;i42;i++)
showDay[i].setText(a[i]);
validate();
}
}