java日歷課程
㈠ 用java做日歷
import java.util.*;
public class test {
public static void main( String[] args ) {
String[] wd= { "日", "一", "二", "三", "四", "五", "六" };
Scanner s = new Scanner(System.in);
P("請輸入要查詢的年份：");
int y = s.nextInt();
P("請輸入月份：");
int m = s.nextInt();
if(y < 2000 || y > 2010) {
P("不在查詢范圍之內！");
return;
}
GregorianCalendar g = new GregorianCalendar( y, m-1, 1 );
P( "\n星期\t" );
for ( int j = 0; j < wd.length; ++j )
P( wd[j] + "\t" );
P();
for ( int j = 0; j < g.get( Calendar.DAY_OF_WEEK ); ++j )
P( "\t" );
int thisMonth = g.get( Calendar.MONTH );
for ( int j = 1; j <= 31; ++j ) {
int d = g.get( Calendar.DAY_OF_MONTH );
P( d + "\t" );
if ( g.get( Calendar.DAY_OF_WEEK ) == 7 ) {
P("\n\t");
}
g.add( Calendar.DAY_OF_YEAR, 1 );
if ( g.get( Calendar.MONDAY ) != thisMonth ) {
P("\n\n");
break;
}
}
}
static void P( String s )
{
System.out.print( s );
}
static void P()
{
System.out.println();
}
}
㈡ 怎麼用java寫日歷
以下是兩個類，請樓主分別存成兩個java文件:
其中
MainFrame.java是顯示日歷程序，Clock.java是日歷計算程序。編譯後運行MainFrame這個類即可。
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(); // 實例化Calendar
MainFrame() {
super("萬年歷");
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);// 將顯示的字元設置為居中
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()); // 得到當前所選年份
c_month = Integer.parseInt(com2.getSelectedItem().toString()) - 1; // 得到當前月份，並減1,計算機中的月為0－11
c_week = use(c_year, c_month); // 調用函數use，得到星期幾
Resetday(c_week, c_year, c_month); // 調用函數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); // 將星期日的日期設置為紅色
}
for (int i = 6; i < 49; i = i + 7) {
label[i].setForeground(Color.green);// 將星期六的日期設置為綠色
}
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)); // 得到當前時間的月份
year = (int) (now.get(Calendar.YEAR)); // 得到當前時間的年份
com1.setSelectedIndex(year - 1); // 設置下拉列表顯示為當前年
com2.setSelectedIndex(month_num); // 設置下拉列表顯示為當前月
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); // 設置時間為所要查詢的年月的第一天
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; // 存儲月份的天數
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); // 前個月
month_day_score = cal.getActualMaximum(Calendar.DAY_OF_MONTH);// 最後一天
for (int i = 7; i < 49; i++) { // 初始化標簽
label[i].setText("");
}
week_log = week_log + 6; // 將星期數加6，使顯示正確
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.(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;
//顯示時間的類：Clock
/** *//**
* Clock.java
* Summary 數字時間顯示
* 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); //實例化線程
t.start(); //調用線程
}
public void run(){
while(true){
try{
Thread.sleep(1000); //休眠1秒鍾
}catch(InterruptedException e){
System.out.println("異常");
}
this.repaint(100);
}
}
public void paint(Graphics g){
Font f=new Font("宋體",Font.BOLD,16);
SimpleDateFormat SDF=new SimpleDateFormat("yyyy'年'MM'月'dd'日'HH:mm:ss");//格式化時間顯示類型
Calendar now=Calendar.getInstance();
time=SDF.format(now.getTime()); //得到當前日期和時間
g.setFont(f);
g.setColor(Color.orange);
g.drawString(time,45,25);
}
}
㈢ 怎樣用java編寫日歷
Java編寫日歷代碼：
importjava.util.Scanner;
publicclassWan{publicstaticvoidmain(String[]args)
{
Scannername=newScanner(System.in);
System.out.print("請輸入要查詢的年份:");
intyear=name.nextInt();
System.out.print("請輸入該年的月份");
intmonth=name.nextInt();
}//累加該年至輸入的月份天數
//比如輸入2009年的3月分
//那就累加2009年的1月至
3月1號的總天數
publicvoidsumDay(intyear,intmonth)
{
intday=0;
intsumDay=0;
for(inti=1;i<=month;i++){switch(i)
{
case1:
case3:
case5:
case7:
case8:
case10:
case12:
day=31;
break;
case2:
if(year%4==0||year%400==0&&year%100!=0)
{day=29;}
else{day=28;}
break;
default:day=30;}
//最後一個月份不要累加因為我們只是要算到該月的一號就可以了
if(i<month){sumDay+=day;}}
//累加2000年到該年的一月一號天數
for(inti=2000;i<year;i++)
{if(i%4==0||i%400==0&&i%100!=0)
{sumDay+=366;}else{sumDay+=365;}}
//求該月一號為星期幾
intweek=sumDay%7+1;if(week==7){week=0;}}
publicvoidfomatDate(intweek,intday)
{
intg=0;for(inti=0;i<week;i++)
{System.out.print(" ");}
for(inti=1;i<=day;i++){System.out.print(i+" ");
g=week+i;if(g%7==0){System.out.println();}
}
}
}
㈣ 用java編寫一個2013全年日歷
下面是一個帶界面的java日歷。可以指定任意年月。默認為2013年1月
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 日歷=Calendar.getInstance();
日歷.set(year,month-1,1);
int 星期幾=日歷.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=星期幾,n=1;i<星期幾+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=2013,month=1;
CalendarBean calendar;
Label showMessage=new Label("",Label.CENTER);
public CalendarFrame()
{ Panel pCenter=new Panel();
pCenter.setLayout(new GridLayout(7,7));
for(int i=0;i<7;i++)
{ titleName[i]=new Button(name[i]);
pCenter.add(titleName[i]);
}
for(int i=0;i<42;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;i<42;i++)
{ labelDay[i].setText(day[i]);
}
lab1=new Label("請輸入日期");
lab2=new Label("年份");
lab3=new Label("月份");
Enter=new Button("確定");
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("日歷："+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(month>12)
month=1;
calendar.setMonth(month);
String day[]=calendar.getCalendar();
for(int i=0;i<42;i++)
{ labelDay[i].setText(day[i]);
}
}
else if(e.getSource()==previousMonth)
{ month=month-1;
if(month<1)
month=12;
calendar.setMonth(month);
String day[]=calendar.getCalendar();
for(int i=0;i<42;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(month>12||month<1||year<1){
JOptionPane.showMessageDialog(null, "請輸入正確月份或月份");
return;
}
else{
calendar.setYear(year);
calendar.setMonth(month);
}
String day[]=calendar.getCalendar();
for(int i=0;i<42;i++)
{
labelDay[i].setText(day[i]);
}
}catch(NumberFormatException ee){
JOptionPane.showMessageDialog(null, "請輸入正確的年份及月份");
}
}
showMessage.setText("日歷："+calendar.getYear()+"年"+calendar.getMonth()+"月" );
}
}
public class CalendarMainClass
{ public static void main(String args[])
{ CalendarFrame frame=new CalendarFrame();
frame.setTitle("日歷");
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);
}
}
);
}
}
有問題就追問。滿意請採納。
㈤ Java中日歷類（CalendarClass）的用途
Java中日歷類（Calendar類）的用途如下：
Calendar類的靜態方法getInstance()可以初始化一個日歷對象:Calendar now = Calendar.getInstance();
可以使用下面三個方法把日歷定到任何一個時間：
set(intyear,intmonth,intdate);
set(intyear,intmonth,intdate,inthour,intminute);
set(intyear,intmonth,intdate,inthour,intminute,intsecond);
如果想獲得年份、月份、小時等信息可以使用：
Now.get(Calendar.Month);//這樣的方法0表示一月，1表示二月
get(Calendar.DAY_OF_MONTH);//獲得這個月的第幾天
get(Calendar.DAY_OF_WEEK);//獲得這個星期的第幾天
get(Calendar.DAY_OF_YEAR);//獲得這個年的第幾天
getTimeMillis();//獲得當前時間的毫秒錶示
1.計算某一月份的最大天數
Calendartime=Calendar.getInstance();
time.clear();
time.set(Calendar.YEAR,year);
time.set(Calendar.MONTH,i-1);//注意,Calendar對象默認一月為0
intday=time.getActualMaximum(Calendar.DAY_OF_MONTH);//本月份的天數
註：在使用set方法之前，必須先clear一下，否則很多信息會繼承自系統當前時間
2.Calendar和Date的轉化
(1) Calendar轉化為Date
Calendarcal=Calendar.getInstance();
Datedate=cal.getTime();
(2) Date轉化為Calendar
Datedate=newDate();
Calendarcal=Calendar.getInstance();
cal.setTime(date);
3.格式化輸出日期時間
Datedate=newDate();
SimpleDateFormatdf=newSimpleDateFormat("yyyy-MM-ddhh:mm:ss");
System.out.println(df.format(date));
4.計算相隔天數的方法
publicintgetDaysBetween(Calendard1,Calendard2){
if(d1.after(d2)){//
java.util.Calendarswap=d1;
d1=d2;
d2=swap;
}
intdays=d2.get(Calendar.DAY_OF_YEAR)-d1.get(Calendar.DAY_OF_YEAR);
inty2=d2.get(Calendar.YEAR);
if(d1.get(Calendar.YEAR)!=y2){
d1=(Calendar)d1.clone();
do{
days+=d1.getActualMaximum(Calendar.DAY_OF_YEAR);//得到當年的實際天數
d1.add(Calendar.YEAR,1);
}while(d1.get(Calendar.YEAR)!=y2);
}
returndays;
}