本篇文章给大家谈谈java弹出日历，以及日历 java对应的知识点，希望对各位有所帮助，不要忘了收藏本站喔。
本文目录一览：
1、用java图形用户界面实现: 编写一个日历程序，能实现显示日历等简单功能。 (运行后有窗体出现的那2、java如何在窗口中显示日历3、java怎么实现日历日程提醒
用java图形用户界面实现: 编写一个日历程序，能实现显示日历等简单功能。 (运行后有窗体出现的那
import javax.swing.JOptionPane;
public class NewClass{
public static void main(String[] args){
int year,month;
Calender cal=new Calender(2008,10);
cal.showCalender();
year=Integer.parseInt(JOptionPane.showInputDialog(“Year:”));
month=Integer.parseInt(JOptionPane.showInputDialog(“Month:”));
cal.setYear(year);
cal.setMonth(month);
cal.showCalender();
}
}
class Calender{
private int year,month;
public Calender(){
year=0;
month=1;
}
public Calender(int year){
this.year=year;
month=1;
}
public Calender(int year,int month){
this.year=year;
if(month12)
this.month=month%12;
else
this.month=month;
}
public void setYear(int year){
this.year=year;
}
public void setMonth(int month){
if(month12)
this.month=month%12;
else
this.month=month;
}
private int dayOfMonth(){
int days=0;
switch(month){
case 1:days=31;break;
case 2:{
if(((year%4==0)(year%100!=0))||(year%400==0))
days=29;
else
days=28;
break;
}
case 3:days=31;break;
case 4:days=30;break;
case 5:days=31;break;
case 6:days=30;break;
case 7:days=31;break;
case 8:days=31;break;
case 9:days=30;break;
case 10:days=31;break;
case 11:days=30;break;
case 12:days=31;break;
default:
days=0;
}
return days;
}
private int dayOfWeek(){
int Y=year;
int M=month;
int D=1;
int A;
A = Y0?(5+(Y+1)+(Y-1)/4-(Y-1)/100+(Y-1)/400)%7:(5+Y+Y/4-Y/100+Y/400)%7;
A = M2?(A+2*(M+1)+3*(M+1)/5)%7:(A+2*(M+2)+3*(M+2)/5)%7;
if (((Y%4 == 0 Y%100 != 0)|| Y%400 == 0) M2) A =(A+1)%7;
A=(A+D)%7;
return A;
}
public void showCalender(){
String str=new String();
str=” “;
str+=year+”年”+month+”月”;
str+=”\n\n”;
str+=”日 一 二 三 四 五 六\n”;
int week=this.dayOfWeek();
for(int i=0,j=1;i7;i++){
if(iweek)
str+=” “;
else{
str+=” “+j+” “;
j++;
}
}
str+=”\n”;
end:
for(int i=7-week+1;i=this.dayOfMonth();){
for(int j=0;j7;j++){
if(i10)
str+=” “+i+” “;
else
str+=i+” “;
i++;
if(ithis.dayOfMonth())
break end;
}
str+=”\n”;
}
JOptionPane.showMessageDialog(null,str);
}
}
java如何在窗口中显示日历
MainFrame.java是显示日历程序，Clock.java是日历计算程序（可以不要）。
编译后运行MainFrame这个类即可。
swing窗口显示万年历，jdk1.4以上环境编译运行。
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133 package org.test;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 = -306484324260972141L; 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, 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(); }}
12345678910111213141516171819202122232425262728293031323334353637383940414243 package org.test;import java.awt.Color;import java.util.Calendar;import java.awt.Canvas;import java.awt.Font;import java.awt.Graphics;import java.text.SimpleDateFormat;public 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); }}
java怎么实现日历日程提醒
用数据库吧
首先，保存事件的表mem
create table mem(
mid varchar(10) not null prmary key,
mdate date not null,
mem varchar(255),
userid varchar(20) not null
)
— 如果是简单的单用户的话可以不要这个。
— 然后用户登录的时候你就可以使用select mem from mem where userid=’当前用户’ and m_date=’今天的日期’就可以查询出这个用户添加的日程提醒了。
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