java弹出日历

① 求一个java编写的日历，用控制台的形式显示。

import
java.util.Calendar;
class
CalendarList{
int
year,month;
int
dayNum,i,num,count=0;
Calendar
objCalendar;
int[]
arrDayNum={31,28,31,30,31,30,31,31,30,31,30,31};
CalendarList(){
objCalendar=Calendar.getInstance();
this.year=objCalendar.get(Calendar.YEAR);
this.month=objCalendar.get(Calendar.MONTH)+1;
//要+1
}
CalendarList(String
args0,String
args1){
this.year=Integer.parseInt(args1);
this.month=Integer.parseInt(args0);
objCalendar=Calendar.getInstance();//这里没有get
objCalendar.set(Calendar.YEAR,year);//set是这样用的
objCalendar.set(Calendar.MONTH,month-1);
}
void
display(){
System.out.println("\t\t\t"+year+"年"+month+"月");
System.out.println("日
一
二
三
四
五
六");
//每个空3个空格
num=objCalendar.get(Calendar.DAY_OF_WEEK);
if
((year/4==0&&year/100!=0)||(year/400==0)){
arrDayNum[1]+=1;
}
for
(i=1;i<=12;i++){
if
(i==month){
dayNum=arrDayNum[i-1];
break;
}
}
for(i=1;i<=num;i++){
System.out.print("
");//5个空格
count++;
}
for
(i=1;i<=dayNum;i++){
System.out.print(i<10?"
"+i+"
":i+"
");
//自己改了下
,空格数:1,3,3
count++;
if(count==7){
System.out.println();
count=0;
}
}
System.out.println
();
}
}
public
class
MainClass
{
public
static
void
main(String[]
args)
{
CalendarList
objCalendar=new
CalendarList();
CalendarList
objCalendar1=new
CalendarList("11","2007");
objCalendar.display();
objCalendar1.display();
}
}

② 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。

③ 用java写个日历程序怎么写，请给出详细步骤，谢谢

随便做了一个，其实一楼网友说的判断哪些30天，是否闰年什么的没必要，看代码：

packagecom..calendar;

importjava.awt.BorderLayout;
importjava.awt.Color;
importjava.awt.FlowLayout;
importjava.awt.Font;
importjava.awt.GridLayout;
importjava.awt.event.ItemEvent;
importjava.awt.event.ItemListener;
importjava.text.DateFormat;
importjava.text.SimpleDateFormat;
importjava.util.Calendar;

importjavax.swing.JComboBox;
importjavax.swing.JFrame;
importjavax.swing.JLabel;
importjavax.swing.JPanel;
importjavax.swing.border.CompoundBorder;
importjavax.swing.border.EmptyBorder;
importjavax.swing.border.LineBorder;

{
	=1L;
	privateJComboBoxyearBox,monthBox;
	privatestaticfinalintYEAR_RANGE=50;//年份范围，即往前往后各推多少年
	
	privateJPaneltopPane,contentPane;
	privateJPanelbottomPane,bottomTopPane,mainPane;
	privateJLabeldateLabel;
	
	privatebooleaninit=false;
	privateCalendarcal;
	privatestaticfinalCalendarNOW=Calendar.getInstance();
	privatestaticfinalString[]DAY_OF_WEEK={"星期日","星期一","星期二",
		"星期三","星期四","星期五","星期六"};
	
	privateDateFormatdf=newSimpleDateFormat("yyyy年MM月");
	privatestaticfinalColorFONT_GRAY=newColor(0xaa,0xaa,0xaa);
	
	privatestaticfinalintDATE_GRAY=-1;
	privatestaticfinalintDATE_RED=1;
	privatestaticfinalintDATE_BLACK=0;
	
	publicCalendarInterface(){
		super("日历");
		cal=Calendar.getInstance();
		cal.setFirstDayOfWeek(Calendar.SUNDAY);
	}
	
	publicvoidlaunch(){
		setVisible(true);
		setSize(600,450);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		//主面板
		contentPane=newJPanel(newBorderLayout());
		contentPane.setBorder(newEmptyBorder(5,5,5,5));
		contentPane.setBackground(Color.WHITE);
		
		//顶部选择日期和月份的区域
		topPane=newJPanel(newFlowLayout(FlowLayout.CENTER,50,0));//居中对齐，控件间隔50px
		topPane.setBorder(newEmptyBorder(0,0,10,0));//底部空出10px
		topPane.setBackground(Color.WHITE);
		
		//底部显示星期条和日历列表区域
		bottomPane=newJPanel(newBorderLayout());
		bottomPane.setBorder(newLineBorder(Color.BLACK,1));
		//星期条
		bottomTopPane=newJPanel(newGridLayout(1,7));
		bottomTopPane.setBackground(newColor(0x55,0x55,0x55));
		//日期列表
		mainPane=newJPanel();
		mainPane.setLayout(newGridLayout(0,7));//列数为7，行数自动填充
		for(inti=Calendar.SUNDAY;i<=Calendar.SATURDAY;i++){
			bottomTopPane.add(createDay(DAY_OF_WEEK[i-1]));
		}
		bottomPane.add(bottomTopPane,BorderLayout.NORTH);//星期栏放在顶部
		
		//年份下拉列表
		yearBox=newJComboBox();
		intcurrentYear=cal.get(Calendar.YEAR);
		//年份范围为往前往后各推50年
		for(inti=currentYear-YEAR_RANGE;i<currentYear+YEAR_RANGE+1;i++){
			yearBox.addItem(i);
		}
		yearBox.addItemListener(newItemListener(){
			@Override
			publicvoiditemStateChanged(ItemEvente){
				if(ItemEvent.SELECTED==e.getStateChange()){
					reset();//选择后刷新布局
				}
			}
		});
		yearBox.setSelectedIndex(YEAR_RANGE);//默认选中当前年份
		
		Stringmonths[]={"1","2","3","4","5","6","7","8","9","10","11","12"};
		//月份下拉列表
		monthBox=newJComboBox(months);
		monthBox.addItemListener(newItemListener(){
			@Override
			publicvoiditemStateChanged(ItemEvente){
				if(ItemEvent.SELECTED==e.getStateChange()){
					reset();//刷新布局
				}
			}
		});
		monthBox.setSelectedIndex(cal.get(Calendar.MONTH));//选择当前月份
		
		//显示当前年月的控件
		this.dateLabel=newJLabel(df.format(cal.getTime()));
		topPane.add(yearBox);
		topPane.add(monthBox);
		topPane.add(dateLabel);
		
		contentPane.add(topPane,BorderLayout.NORTH);
		bottomPane.add(mainPane,BorderLayout.CENTER);
		contentPane.add(bottomPane,BorderLayout.CENTER);
		setContentPane(contentPane);
		validate();
		init=true;//初始化完成
		reset();//刷新界面
		setLocationRelativeTo(null);//居中显示
	}

	publicstaticvoidmain(String[]args){
		newCalendarInterface().launch();
	}

	privatevoidreset(){//每次年份或月份改变后则日历重新排列
		if(!init){//若未初始化则返回，避免设置默认年月时调用此方法出错
			return;
		}
		intyear=(Integer)yearBox.getSelectedItem();
		intmonth=Integer.parseInt((String)monthBox.getSelectedItem());
		
		//将日期设置为本月第一天
		cal.set(Calendar.YEAR,year);
		cal.set(Calendar.MONTH,month-1);
		cal.set(Calendar.DATE,1);
		dateLabel.setText(df.format(cal.getTime()));//显示年月
		
		mainPane.removeAll();//清空日历列表
		
		//判断本月第一天是星期几，在第一天之前增加空的日历
		intstartDayOfWeek=cal.get(Calendar.DAY_OF_WEEK);
		inti;
		//先设置为本周属于上个月的几天，置灰显示
		cal.add(Calendar.DATE,-(startDayOfWeek-Calendar.SUNDAY)-1);
		for(i=Calendar.SUNDAY;i<startDayOfWeek;i++){
			cal.add(Calendar.DATE,1);
			intdate=cal.get(Calendar.DATE);
			mainPane.add(createDate(Integer.toString(date),DATE_GRAY));
		}
		i=startDayOfWeek;

		//重新初始化为本月第一天
		cal.set(Calendar.MONTH,month-1);
		cal.set(Calendar.DATE,1);
		intmaxDate=cal.getActualMaximum(Calendar.DATE);//本月最多的天数（不用再去判断是否闰年了）
		for(intj=1;j<=maxDate;j++){
			cal.set(Calendar.DATE,j);//日期一直自增，用来判断是否是今天
			JLabeljlDate=null;
			if(isToday()){//是今天则高亮显示
				jlDate=createDate(Integer.toString(j),DATE_RED);
			}else{//不是今天则显示为普通颜色
				jlDate=createDate(Integer.toString(j));
			}
			mainPane.add(jlDate);
		}
		//最后一周把不属于本月的几天用灰色控件填充
		intlastDay=cal.get(Calendar.DAY_OF_WEEK);
		for(i=lastDay;i<Calendar.SATURDAY;i++){
			cal.add(Calendar.DATE,1);
			intdate=cal.get(Calendar.DATE);
			mainPane.add(createDate(Integer.toString(date),DATE_GRAY));
		}
		mainPane.validate();
	}
	
	privateJLabelcreateDate(Stringdate){
		returncreateDate(date,DATE_BLACK);
	}
	//创建日期控件
	privateJLabelcreateDate(Stringdate,intdateColor){
		JLabellabel=newJLabel(date,JLabel.CENTER);
		CompoundBorderborder=newCompoundBorder(
				newLineBorder(Color.WHITE,1),
				newEmptyBorder(10,10,10,10));
		
		label.setBorder(border);
		Fontfont=newFont("Arial",Font.BOLD,30);
		if(DATE_GRAY==dateColor){//如果不是本月则文字置灰
			label.setForeground(FONT_GRAY);
		}elseif(DATE_RED==dateColor){//如果是今天则高亮显示
			label.setForeground(Color.RED);
		}
		label.setFont(font);
		returnlabel;
	}
	
	//创建星期几的横条
	privateJLabelcreateDay(Stringday){
		JLabeljlDay=newJLabel(day,JLabel.CENTER);
		jlDay.setBorder(newEmptyBorder(5,5,5,5));
		jlDay.setBackground(Color.GRAY);
		jlDay.setForeground(Color.WHITE);
		returnjlDay;
	}
	
	//判断是否今天
	privatebooleanisToday(){
		returncal.get(Calendar.YEAR)==NOW.get(Calendar.YEAR)
				&&cal.get(Calendar.MONTH)==NOW.get(Calendar.MONTH)
				&&cal.get(Calendar.DATE)==NOW.get(Calendar.DATE);
	}
}

④ 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(month>12)
this.month=month%12;
else
this.month=month;
}
public void setYear(int year){
this.year=year;
}
public void setMonth(int month){
if(month>12)
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 = Y>0?(5+(Y+1)+(Y-1)/4-(Y-1)/100+(Y-1)/400)%7:(5+Y+Y/4-Y/100+Y/400)%7;
A = M>2?(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) && M>2) 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;i<7;i++){
if(i<week)
str+=" ";
else{
str+=" "+j+" ";
j++;
}
}
str+="\n";
end:
for(int i=7-week+1;i<=this.dayOfMonth();){
for(int j=0;j<7;j++){
if(i<10)
str+=" "+i+" ";
else
str+=i+" ";
i++;
if(i>this.dayOfMonth())
break end;
}
str+="\n";
}
JOptionPane.showMessageDialog(null,str);

}
}

⑤ 日历输出程序java控制流程

import java.util.Calendar;
import java.util.Date;
import java.util.Scanner;

public class MyCalendar
{
public static void main(String[] args)
{
Scanner scanner = new Scanner(System.in);
String reg = "^(\\d+)[^\\d]+((0?[1-9])|(1[012]))$";
while(true)
{
System.out.println("输入年月(年和月用非数字隔开:如2015.1)(什么都不输入直接退出)");
String line = scanner.nextLine().trim();
if("".equals(line))
{
scanner.close();
break;
}
if(!line.matches(reg))
{
continue;
}
int year = Integer.parseInt(line.replaceAll(reg, "$1"));
int month = Integer.parseInt(line.replaceAll(reg, "$2"));
System.out.println("日\t一\t二\t三\t四\t五\t六");
Calendar calendar = Calendar.getInstance();
// 这个月的1号是星期几
calendar.set(year, month - 1, 1);
int day = calendar.get(Calendar.DAY_OF_WEEK);
int start = Calendar.SUNDAY;
calendar.add(Calendar.DATE, -day + start);
while(start < day)
{
System.out.print(calendar.get(Calendar.DATE) + "\t");
calendar.add(Calendar.DATE, 1);
start++;
}
calendar.set(year, month - 1, 1);
Date now = calendar.getTime();
calendar.set(year, month, 1);
Date next = calendar.getTime();
for(Date cur = now; cur.before(next);)
{
calendar.setTime(cur);
int x = calendar.get(Calendar.DATE);
String tmp = x < 10 ? "0" + x : x + "";
System.out.print(tmp + "\t");
if(calendar.get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY)
{
System.out.println();
}
calendar.add(Calendar.DATE, 1);
cur = calendar.getTime();
}
calendar.add(Calendar.DATE, -1);
int to = calendar.get(Calendar.DAY_OF_WEEK);
int end = Calendar.SATURDAY;
while(to < end)
{
calendar.add(Calendar.DATE, 1);
int x = calendar.get(Calendar.DATE);
String tmp = x < 10 ? "0" + x : x + "";
System.out.print(tmp + "\t");
to++;
}
System.out.println("\r\n");
}
}
}

⑥ java 界面中窗体里面点击一个按钮或输入框时显示一个日历表格，里面可以选择日期。。。

swing 可以使用 SwingX库提供的JXDatePicker

⑦ java如何在窗口中显示日历

Date date = new Date();//你具体要赋值的Date值
JComboBox comboBox = new JComboBox();//你自己的下拉列表

Calendar cal = Calendar.getInstance();
cal.setTime(date);

int maxWeek =cal.get(Calendar.WEEK_OF_YEAR);
for(int i=1;i<=maxWeek;i++){
comboBox.addItem(i);
}