「java添加日历」java怎么做日历
今天给各位分享java添加日历的知识，其中也会对java怎么做日历进行解释，如果能碰巧解决你现在面临的问题，别忘了关注本站，现在开始吧！
本文目录一览：
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); }}
如何用JAVA写日历？
按照你的要求编写的Java日历验证程序如下
UI.java
import java.util.Scanner;
public class UI {
static Scanner sc=new Scanner(System.in);
public static int askInt(String s){
System.out.print(s);
return sc.nextInt();
}
public static void println(String s){
System.out.println(s);
}
}
EE.java
public class EE {
public void validateDateCore(){
int year =UI.askInt("Enter the year: ");
int month=UI.askInt("Enter the month: ");
int day=UI.askInt("Enter the day: ");
if(year 1){
UI.println("The year is not a valid number.");
return;
}
if(month1 || month12){
UI.println("The month is not a valid number.");
return;
}
int monthDay=0;
switch(month){
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:monthDay=31;break;
case 4:
case 6:
case 9:
case 11:monthDay=30;break;
case 2:
if((year%4==0 year%100!=0) || year%400==0){
monthDay=29;
}else{
monthDay=28;
}
break;
}
if(day1 || daymonthDay){
UI.println("The day is not a valid number.");
return;
}else{
UI.println("It is "+day+"/"+month+"/"+year+".");
}
}
public static void main(String[] args) {
new EE().validateDateCore();
}
}
运行结果
如何用java做日历
看看下面代码：
import java.awt.*;
import java.awt.event.*;
import java.util.Calendar;
import javax.swing.JOptionPane;
class CalendarBean
{
String day[];
int year=2011,month=0;
public void setYear(int year)
{ this.year=year;
}
public int getYear()
{ return year;
}
public void setMonth(int month)
{ this.month=month;
}
public int getMonth()
{ return month;
}
public String[] getCalendar()
{ String a[]=new String[42];
Calendar 日历=Calendar.getInstance();
日历.set(year,month-1,1);
int 星期几=日历.get(Calendar.DAY_OF_WEEK)-1;
int day=0;
if(month==1||month==3||month==5||month==7||month==8||month==10||month==12)
{ day=31;
}
if(month==4||month==6||month==9||month==11)
{ day=30;
}
if(month==2)
{ if(((year%4==0)(year%100!=0))||(year%400==0))
{ day=29;
}
else
{ day=28;
}
}
for(int i=星期几,n=1;i星期几+day;i++)
{
a[i]=String.valueOf(n) ;
n++;
}
return a;
}
}
class CalendarFrame extends Frame implements ActionListener
{
Label labelDay[]=new Label[42];
Button titleName[]=new Button[7];
String name[]={"日","一","二","三", "四","五","六"};
TextField text1,text2;Button nextMonth,previousMonth,Enter;Label lab1,lab2,lab3;
int year=2012,month=5;
CalendarBean calendar;
Label showMessage=new Label("",Label.CENTER);
public CalendarFrame()
{ Panel pCenter=new Panel();
pCenter.setLayout(new GridLayout(7,7));
for(int i=0;i7;i++)
{ titleName[i]=new Button(name[i]);
pCenter.add(titleName[i]);
}
for(int i=0;i42;i++)
{
labelDay[i]=new Label("",Label.CENTER);
pCenter.add(labelDay[i]);
}
calendar=new CalendarBean();
calendar.setYear(year);
calendar.setMonth(month);
String day[]=calendar.getCalendar();
for(int i=0;i42;i++)
{ labelDay[i].setText(day[i]);
}
lab1=new Label("请输入日期");
lab2=new Label("年份");
lab3=new Label("月份");
Enter=new Button("确定");
text1=new TextField(10);
text2=new TextField(5);
nextMonth=new Button("下月");
previousMonth=new Button("上月");
Enter.addActionListener(this);
nextMonth.addActionListener(this);
previousMonth.addActionListener(this);
Panel pNorth=new Panel(),
pSouth=new Panel();
pNorth.add( lab1);
pNorth.add(lab2);
pNorth.add( text1);
pNorth.add(lab3);
pNorth.add(text2);
pNorth.add(Enter);
pNorth.add(previousMonth);
pNorth.add(nextMonth);
pSouth.add(showMessage);
showMessage.setText("日历："+calendar.getYear()+"年"+ calendar.getMonth()+"月" );
ScrollPane scrollPane=new ScrollPane();
scrollPane.add(pCenter);
add(scrollPane,BorderLayout.CENTER);
add(pNorth ,BorderLayout.NORTH);
add(pSouth ,BorderLayout.SOUTH);
}
public void actionPerformed(ActionEvent e)
{ if(e.getSource()==nextMonth)
{ month=month+1;
if(month12)
month=1;
calendar.setMonth(month);
String day[]=calendar.getCalendar();
for(int i=0;i42;i++)
{ labelDay[i].setText(day[i]);
}
}
else if(e.getSource()==previousMonth)
{ month=month-1;
if(month1)
month=12;
calendar.setMonth(month);
String day[]=calendar.getCalendar();
for(int i=0;i42;i++)
{ labelDay[i].setText(day[i]);
}
}else {
String yea=text1.getText();
String mon=text2.getText();
try{
year=Integer.parseInt(yea);
month=Integer.parseInt(mon);
if(month12||month1||year1){
JOptionPane.showMessageDialog(null, "请输入正确月份或月份");
return;
}
else{
calendar.setYear(year);
calendar.setMonth(month);
}
String day[]=calendar.getCalendar();
for(int i=0;i42;i++)
{
labelDay[i].setText(day[i]);
}
}catch(NumberFormatException ee){
JOptionPane.showMessageDialog(null, "请输入正确的年份及月份");
}
}
showMessage.setText("日历："+calendar.getYear()+"年"+calendar.getMonth()+"月" );
}
}
public class CalendarMainClass
{ public static void main(String args[])
{ CalendarFrame frame=new CalendarFrame();
frame.setTitle("日历");
frame.setBounds(300,200,500,300);
frame.setVisible(true);
frame.validate();
frame.addWindowListener(new java.awt.event.WindowAdapter()
{ public void windowClosing(java.awt.event.WindowEvent e)
{ System.exit(0);
}
}
);
}
}
有问题就追问。满意请采纳。
java中的Calendar如何使用？
package pack.java.calendar.demo; \x0d\x0a \x0d\x0aimport java.text.SimpleDateFormat; \x0d\x0aimport java.util.Calendar; \x0d\x0aimport java.util.Date; \x0d\x0aimport java.util.GregorianCalendar; \x0d\x0a \x0d\x0apublic class CalendarDemo { \x0d\x0a private static SimpleDateFormat date_format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); \x0d\x0a public static void main(String[] args) { \x0d\x0a \x0d\x0a //获取calendar实例; \x0d\x0a Calendar calendar = Calendar.getInstance(); \x0d\x0a \x0d\x0a //判断calendar是不是GregorianCalendar类的实例; \x0d\x0a if(calendar instanceof GregorianCalendar){ \x0d\x0a System.out.println("属于GregorianCalendar类的实例!"); \x0d\x0a } \x0d\x0a \x0d\x0a //从calendar对象中获得date对象，当前时间; \x0d\x0a Date dates = calendar.getTime(); \x0d\x0a \x0d\x0a //格式化时间; \x0d\x0a String date_str= date_format.format(dates); \x0d\x0a System.out.println(date_str); \x0d\x0a \x0d\x0a //设置月份05；代表日历的月份6月，因为月份从0开始。 \x0d\x0a calendar.set(Calendar.MONTH, 05); \x0d\x0a \x0d\x0a int months = calendar.get(Calendar.MONTH); \x0d\x0a System.out.println(months); //输出05; \x0d\x0a \x0d\x0a //设置日期为2011-07-24 09：59:50 \x0d\x0a calendar.set(2011, 06, 24, 9, 59, 50); \x0d\x0a String getDate = date_format.format(calendar.getTime()); \x0d\x0a System.out.println(getDate); //输出2011-07-24 09:59:50; \x0d\x0a \x0d\x0a //比较日前大小; \x0d\x0a if(new Date().getTime() calendar.getTimeInMillis()){ \x0d\x0a System.out.println("当前日期在后!"); \x0d\x0a }else{ \x0d\x0a System.out.println("当前日期在前!"); \x0d\x0a } \x0d\x0a \x0d\x0a //设置当前时间为:2011-07-24 11:06:00 \x0d\x0a calendar.setTime(new Date()); \x0d\x0a int year = calendar.get(Calendar.YEAR); //获取年; \x0d\x0a int month = calendar.get(Calendar.MONTH); //获取月; \x0d\x0a int date = calendar.get(Calendar.DATE); //获取天; \x0d\x0a int hour = calendar.get(Calendar.HOUR); //获取小时; \x0d\x0a int minute = calendar.get(Calendar.MINUTE); //获取分钟; \x0d\x0a int second = calendar.get(Calendar.SECOND); //获取秒钟; \x0d\x0a int hour_of_day = calendar.get(Calendar.HOUR_OF_DAY); //第几个小时， \x0d\x0a int day_of_month = calendar.get(Calendar.DAY_OF_MONTH); //这天，在一个月内是第几天. \x0d\x0a int day_of_week = calendar.get(Calendar.DAY_OF_WEEK); //这天，在一周内，是第几天. \x0d\x0a int day_of_year = calendar.get(Calendar.DAY_OF_YEAR); //这天，在一年内，是第几天。 \x0d\x0a int week_of_year = calendar.get(Calendar.WEEK_OF_YEAR); //这周，在一年内是第几周; \x0d\x0a int week_of_month = calendar.get(Calendar.WEEK_OF_MONTH);//这周，在这个月是第几周;以以星为标准； \x0d\x0a int zone_offset = calendar.get(Calendar.ZONE_OFFSET); //获取时区; \x0d\x0a int day_of_week_in_month = calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH); //某月中第几周，按这个月1号算，1号起就是第1周，8号起就是第2周。以月份天数为标准 \x0d\x0a int r = calendar.get(Calendar.AM_PM); \x0d\x0a if(r==calendar.AM){ \x0d\x0a System.out.println("现在是上午"); \x0d\x0a } \x0d\x0a \x0d\x0a if(r==calendar.PM){ \x0d\x0a System.out.println("现在是下午"); \x0d\x0a } \x0d\x0a System.out.println("=================================================="); \x0d\x0a System.out.println(year); \x0d\x0a System.out.println(month); \x0d\x0a System.out.println(date); \x0d\x0a System.out.println(hour); \x0d\x0a System.out.println(minute); \x0d\x0a System.out.println(second); \x0d\x0a System.out.println(hour_of_day); \x0d\x0a System.out.println(day_of_month); \x0d\x0a System.out.println(day_of_week); \x0d\x0a System.out.println(day_of_year); \x0d\x0a System.out.println(week_of_year); \x0d\x0a System.out.println(week_of_month); \x0d\x0a System.out.println(zone_offset); \x0d\x0a System.out.println(day_of_week_in_month); \x0d\x0a } \x0d\x0a}
java编写日历
我给你贴上我在java核心技术中看到的代码吧,当然没有输入年份和月份,是按照当前时间创建的,写有我写的注释,应该能看的懂
/*
* 2012年5月13日10:37:58
* 日历程序
* Function:
* 显示当前月份的日历
* 总结
* 1. 0-11分别代表1-12月
* 1-7分别代表周日-周六
* 2. 使用GregorianCalendar对象的get方法（参数）获取月，日，年等信息
* 3.
*/
import java.text.DateFormatSymbols;
import java.util.*;
public class CalendarTest {
public static void main(String[] args) {
//construct d as current date构造一个日期
GregorianCalendar d = new GregorianCalendar();
//获取今天是这个月的第几天
int today = d.get(Calendar.DAY_OF_MONTH); //Calendar.DAY_OF_MONTH作为参数调用，得到今天是这个月的第几天
int month = d.get(Calendar.MONTH); //月份
d.set(Calendar.DAY_OF_MONTH, 1); //设置d的日期是本月的1号
int weekDay = d.get(Calendar.DAY_OF_WEEK); //获取当天位于本星期的第几天，也就确定了星期几，值的范围是1-7
int firstDayOfWeek = d.getFirstDayOfWeek(); //获取一星期的第一天,我们得到的是Calendar.SUNDAY,因为我们一星期的第一天是周日
int indent = 0; //为了定位本月第一天，定义索引
while (weekDay != firstDayOfWeek) {
//注意，月份用0-11代表1-12月，为了清晰起见，使用常量代替，下面获取月份得到的实际是当前月-1的值，所以我们要加1
//System.out.printf("当前星期的第%d天,位于当月的第%d天, 现在是%d月\n",
// weekDay, d.get(Calendar.DAY_OF_MONTH), d.get(Calendar.MONTH)+1); //Test Code
indent++;//缩进个数+1
d.add(Calendar.DAY_OF_MONTH, -1);//当前天数-1，如果现在是1号，则执行本条代码后，时间变为上一个月最后一天
weekDay = d.get(Calendar.DAY_OF_WEEK); //重新获取当天位于本星期的第几天
}
String[] weekDayNames = new DateFormatSymbols().getShortWeekdays();//获取简短形式的星期字符串数组
//System.out.println(weekDayNames.length);getShortWeekdays()得到的数组的长度是8，下标为0的是没有值1为星期日...7为星期六
//注释代码1
//Java核心技术的代码
/*
do {
//System.out.printf("%4s", weekDayNames[weekDay]); //经过上面定义索引，weekDay代表的是本星期日
d.add(Calendar.DAY_OF_MONTH, 1); //天数加1
weekDay = d.get(Calendar.DAY_OF_WEEK); //重新获得weekDay的值
} while (weekDay != firstDayOfWeek); //当循环完一个星期后，这里判断不成立，退出循环
*/
//我写的代码，替换上面注释代码1
for (int i=1; iweekDayNames.length; i++)//打印星期标题
System.out.printf("%3s\t", weekDayNames[i]);//引号内是一个全角的空格，因为是中文版，不是书上英文环境,中文和空格对于不上,这里我们用\t解决
//System.out.printf("%3s ", weekDayNames[i]); //方式2
System.out.println();//换行
for (int i=1; i=indent; i++)//确定一星期的一天位置，利用上面indent
System.out.printf("\t");//如用方式2，则这里内容是四个全角空格
//实现输出日期
d.set(Calendar.MONTH, month);
d.set(Calendar.DAY_OF_MONTH, 1);
do {
//print day
int day = d.get(Calendar.DAY_OF_MONTH);
System.out.printf("%3d", day);
if (day == today)
System.out.print("*");
System.out.print("\t");
d.add(Calendar.DATE, 1);//天数加1
weekDay = d.get(Calendar.DAY_OF_WEEK);//刷新weekDay
if (weekDay == firstDayOfWeek) //如果这天等于星期天则换行
System.out.println();
} while (d.get(Calendar.MONTH) == month);
}
}
java添加日历的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于java怎么做日历、java添加日历的信息别忘了在本站进行查找喔。