「java日历表」java做日历
本篇文章给大家谈谈java日历表，以及java做日历对应的知识点，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、Java日历查询程序(万年历)
- 2、JAVA里的日历表怎么打啊？
- 3、简易日历表，JAVA，布局的
- 4、用java控制台实现万年历－要求打印当前年月日的日历表格，要求对当天的日期单独标示
- 5、java制作日历
- 6、怎么用JAVA编写万年历！
Java日历查询程序(万年历)
花了半个小时写了一个望采纳给好评。
import java.util.Scanner;
public class PrintCalendar {
/** Main method */
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
// Prompt the user to enter year
System.out.print("Enter full year (e.g., 2001): ");
int year = input.nextInt();
// Prompt the user to enter month
System.out.print("Enter month in number between 1 and 12: ");
int month = input.nextInt();
// Print calendar for the month of the year
printMonth(year, month);
}
/** Print the calendar for a month in a year */
public static void printMonth(int year, int month) {
// Print the headings of the calendar
printMonthTitle(year, month);
// Print the body of the calendar
printMonthBody(year, month);
}
/** Print the month title, e.g., May, 1999 */
public static void printMonthTitle(int year, int month) {
System.out.println(" " + getMonthName(month)
+ " " + year);
System.out.println("-----------------------------");
System.out.println(" Sun Mon Tue Wed Thu Fri Sat");
}
/** Get the English name for the month */
public static String getMonthName(int month) {
String monthName = "";
switch (month) {
case 1: monthName = "January"; break;
case 2: monthName = "February"; break;
case 3: monthName = "March"; break;
case 4: monthName = "April"; break;
case 5: monthName = "May"; break;
case 6: monthName = "June"; break;
case 7: monthName = "July"; break;
case 8: monthName = "August"; break;
case 9: monthName = "September"; break;
case 10: monthName = "October"; break;
case 11: monthName = "November"; break;
case 12: monthName = "December";
}
return monthName;
}
/** Print month body */
public static void printMonthBody(int year, int month) {
// Get start day of the week for the first date in the month
int startDay = getStartDay(year, month);
// Get number of days in the month
int numberOfDaysInMonth = getNumberOfDaysInMonth(year, month);
// Pad space before the first day of the month
int i = 0;
for (i = 0; i startDay; i++)
System.out.print(" ");
for (i = 1; i = numberOfDaysInMonth; i++) {
System.out.printf("%4d", i);
if ((i + startDay) % 7 == 0)
System.out.println();
}
System.out.println();
}
/** Get the start day of month/1/year */
public static int getStartDay(int year, int month) {
final int START_DAY_FOR_JAN_1_1800 = 3;
// Get total number of days from 1/1/1800 to month/1/year
int totalNumberOfDays = getTotalNumberOfDays(year, month);
// Return the start day for month/1/year
return (totalNumberOfDays + START_DAY_FOR_JAN_1_1800) % 7;
}
/** Get the total number of days since January 1, 1800 */
public static int getTotalNumberOfDays(int year, int month) {
int total = 0;
// Get the total days from 1800 to 1/1/year
for (int i = 1800; i year; i++)
if (isLeapYear(i))
total = total + 366;
else
total = total + 365;
// Add days from Jan to the month prior to the calendar month
for (int i = 1; i month; i++)
total = total + getNumberOfDaysInMonth(year, i);
return total;
}
/** Get the number of days in a month */
public static int getNumberOfDaysInMonth(int year, int month) {
if (month == 1 || month == 3 || month == 5 || month == 7 ||
month == 8 || month == 10 || month == 12)
return 31;
if (month == 4 || month == 6 || month == 9 || month == 11)
return 30;
if (month == 2) return isLeapYear(year) ? 29 : 28;
return 0; // If month is incorrect
}
/** Determine if it is a leap year */
public static boolean isLeapYear(int year) {
return year % 400 == 0 || (year % 4 == 0 year % 100 != 0);
}
}
JAVA里的日历表怎么打啊？
import java.util.Calendar;
import java.util.GregorianCalendar;
class ViewMonth{
int month;
int year;
ViewMonth(int intYear, int intMonth){
month = intMonth;
year = intYear;
}
private String getMonth(){
String[] s = {"1月","2月","3月","4月","5月","6月","7月","8月","9月","10月","11月","12月"};
return s[month];
}
private int getDays(){
int[] daysOfMonth = {31,28,31,30,31,30,31,31,30,31,30,31};
return daysOfMonth[month];
}
void printMonth(){
String monthName = getMonth();
System.out.println("\t\t\t" + year +" 年 " + monthName );
System.out.println("\t日\t一\t二\t三\t四\t五\t六");
GregorianCalendar objG = new GregorianCalendar(year,month,1);
int initialSpace = objG.get(Calendar.DAY_OF_WEEK)-1;
for(int i = 0; i initialSpace; i++){
System.out.print("\t");
}
int days = getDays();
if(objG.isLeapYear(year)(month == 1)){
days++;
}
for(int i = 1; i = days; i++){
System.out.print("\t" + i );
if((initialSpace + i)%7 == 0){
System.out.println();
}
}
}
}
class MonthTest{
public static void main(String[] args){
int year = 0;
int month = 0;
if(args.length==2){
year = Integer.parseInt(args[0]);
month = Integer.parseInt(args[1])-1;
}else{
Calendar today = Calendar.getInstance();
year = today.get(Calendar.YEAR);
month = today.get(Calendar.MONTH);
}
ViewMonth objV = new ViewMonth(year,month);
objV.printMonth();
}
}
简易日历表，JAVA，布局的
按照你的要求编写的Java程序如下：
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Calendar;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class CCI extends JFrame implements ActionListener{
JButton jb1=new JButton("");
JButton jb2=new JButton("");
JButton jb3=new JButton("");
JButton jb4=new JButton("");
JPanel jp1=new JPanel();
JPanel jp2=new JPanel();
JPanel jp3=new JPanel();
JPanel jp4=new JPanel();
JLabel jl1=new JLabel();
JLabel jl2=new JLabel();
JLabel[]jl=new JLabel[49];
String []week={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
Calendar c=Calendar.getInstance();
int year,month,day;
int nowyear,nowmonth,nowday;
CCI(){
super("简单日历");
nowyear=c.get(Calendar.YEAR);
nowmonth=c.get(Calendar.MONTH)+1;
nowday=c.get(Calendar.DAY_OF_MONTH);
year=nowyear;
month=nowmonth;
day=nowday;
String s=year+"年"+month+"月";
jl1.setForeground(Color.RED);
jl1.setText(s);
jb1.addActionListener(this);
jb2.addActionListener(this);
jb3.addActionListener(this);
jb4.addActionListener(this);
jp1.add(jb1);jp1.add(jb2);jp1.add(jl1);jp1.add(jb3);jp1.add(jb4);
jp2.setLayout(null);
createMonthPanel();
jp2.add(jp3);
jl2.setText("今天是"+nowyear+"年"+nowmonth+"月"+nowday+"日");
jp4.add(jl2);
add(jp1,BorderLayout.NORTH);
add(jp2,BorderLayout.CENTER);
add(jp4,BorderLayout.SOUTH);
setSize(500,500);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setVisible(true);
}
@Override
public void actionPerformed(ActionEvent ae) {
if(ae.getSource()==jb1){
year=year-1;
String s=year+"年"+month+"月";
jl1.setText(s);
jp3.removeAll();
createMonthPanel();
jp3.validate();
}
if(ae.getSource()==jb2){
if(month==1){
year=year-1;
month=12;
}else{
month=month-1;
}
String s=year+"年"+month+"月";
jl1.setText(s);
jp3.removeAll();
createMonthPanel();
jp3.validate();
}
if(ae.getSource()==jb3){
if(month==12){
year=year+1;
month=1;
}else{
month=month+1;
}
String s=year+"年"+month+"月";
jl1.setText(s);
jp3.removeAll();
createMonthPanel();
jp3.validate();
}
if(ae.getSource()==jb4){
year=year+1;
String s=year+"年"+month+"月";
jl1.setText(s);
jp3.removeAll();
createMonthPanel();
jp3.validate();
}
}
public static void main(String[] args) {
new CCI();
}
public int getMonthDays(int year, int month) {
switch (month) {
case 3:
case 5:
case 7:
case 8:
case 10:
return 31;
case 1:
if ((year%4==0year%100!=0)||year%400==0) {
return 29;
} else {
return 28;
}
default:
return 30;
}
}
public void createMonthPanel(){
c.set(year, month-1, getMonthDays(year,month));
int weekOfMonth=c.get(Calendar.WEEK_OF_MONTH);
if(weekOfMonth==6){
jp3.setLayout(new GridLayout(7,7));
jp3.setBounds(50, 20, 420, 350);
}else{
jp3.setLayout(new GridLayout(6,7));
jp3.setBounds(50, 20, 420, 300);
}
jp3.setBorder(BorderFactory.createEtchedBorder());
for(int i=0;i7;i++){
jl[i]=new JLabel(week[i],JLabel.CENTER);
jl[i].setBorder(BorderFactory.createEtchedBorder());
jp3.add(jl[i]);
}
c.set(year, month-1, 1);
int emptyFirst=c.get(Calendar.DAY_OF_WEEK)-1;
int daysOfMonth=getMonthDays(year,month);
for(int i=6+emptyFirst;i=7;i--){
int intyear=year;
int intmonth=month;
if(intmonth==1){
intyear=intyear-1;
intmonth=12;
}else{
intmonth=intmonth-1;
}
int intdays=getMonthDays(intyear,intmonth);
jl[i]=new JLabel((intdays+7-i)+"",JLabel.CENTER);
jl[i].setForeground(Color.GRAY);
jl[i].setBorder(BorderFactory.createEtchedBorder());
jp3.add(jl[i]);
}
for(int i=7+emptyFirst;idaysOfMonth+7+emptyFirst;i++){
jl[i]=new JLabel((i-7-emptyFirst+1)+"",JLabel.CENTER);
if((i+1)%7==0 || (i+1)%7==1 || (i-7-emptyFirst+1)==nowdaymonth==nowmonthyear==nowyear)
jl[i].setForeground(Color.RED);
else
jl[i].setForeground(Color.BLACK);
jl[i].setBorder(BorderFactory.createEtchedBorder());
jp3.add(jl[i]);
}
if(weekOfMonth==6)
for(int i=48;i=daysOfMonth+emptyFirst+7;i--){
jl[i]=new JLabel((49-i)+"",JLabel.CENTER);
jl[i].setForeground(Color.GRAY);
jl[i].setBorder(BorderFactory.createEtchedBorder());
jp3.add(jl[i]);
}
else
for(int i=41;i=daysOfMonth+emptyFirst+7;i--){
jl[i]=new JLabel((42-i)+"",JLabel.CENTER);
jl[i].setForeground(Color.GRAY);
jl[i].setBorder(BorderFactory.createEtchedBorder());
jp3.add(jl[i]);
}
}
}
运行结果：
用java控制台实现万年历－要求打印当前年月日的日历表格，要求对当天的日期单独标示
以下是用java swing编写的日历，很好用，在我所做的系统里就能够正常的使用
接下来 是具体代码：
package Demo;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JFormattedTextField;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSpinner;
import javax.swing.SpinnerNumberModel;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;
import javax.swing.border.LineBorder;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class DateChooser extends JPanel implements ActionListener,
ChangeListener {
/**
*
*/
private static final long serialVersionUID = 1L;
int startYear = 1980;
int lastYear = 2050;
int width = 270;
int height = 200;
Color backGroundColor = Color.gray;
Color palletTableColor = Color.white;
Color todayBackColor = Color.orange;
Color weekFontColor = Color.blue;
Color dateFontColor = Color.black;
Color weekendFontColor = Color.red;
Color controlLineColor = Color.pink;
Color controlTextColor = Color.white;
Color rbFontColor = Color.white;
Color rbBorderColor = Color.red;
Color rbButtonColor = Color.pink;
Color rbBtFontColor = Color.red;
JDialog dialog;
JSpinner yearSpin;
JSpinner monthSpin;
JSpinner hourSpin;
JSpinner minuteSpin;
JButton[][] daysButton = new JButton[6][7];
JFormattedTextField jFormattedTextField;
Calendar c = getCalendar();
DateChooser(JFormattedTextField jftf) {
jFormattedTextField = jftf;
setLayout(new BorderLayout());
setBorder(new LineBorder(backGroundColor, 2));
setBackground(backGroundColor);
JPanel topYearAndMonth = createYearAndMonthPanal();
add(topYearAndMonth, BorderLayout.NORTH);
JPanel centerWeekAndDay = createWeekAndDayPanal();
add(centerWeekAndDay, BorderLayout.CENTER);
}
private JPanel createYearAndMonthPanal() {
int currentYear = c.get(Calendar.YEAR);
int currentMonth = c.get(Calendar.MONTH) + 1;
int currentHour = c.get(Calendar.HOUR_OF_DAY);
int currentMinute = c.get(Calendar.MINUTE);
JPanel result = new JPanel();
result.setLayout(new FlowLayout());
result.setBackground(controlLineColor);
yearSpin = new JSpinner(new SpinnerNumberModel(currentYear, startYear,
lastYear, 1));
yearSpin.setPreferredSize(new Dimension(48, 20));
yearSpin.setName("Year");
yearSpin.setEditor(new JSpinner.NumberEditor(yearSpin, "####"));
yearSpin.addChangeListener(this);
result.add(yearSpin);
JLabel yearLabel = new JLabel("年");
yearLabel.setForeground(controlTextColor);
result.add(yearLabel);
monthSpin = new JSpinner(new SpinnerNumberModel(currentMonth, 1, 12, 1));
monthSpin.setPreferredSize(new Dimension(35, 20));
monthSpin.setName("Month");
monthSpin.addChangeListener(this);
result.add(monthSpin);
JLabel monthLabel = new JLabel("月");
monthLabel.setForeground(controlTextColor);
result.add(monthLabel);
hourSpin = new JSpinner(new SpinnerNumberModel(currentHour, 0, 23, 1));
hourSpin.setPreferredSize(new Dimension(35, 20));
hourSpin.setName("Hour");
hourSpin.addChangeListener(this);
result.add(hourSpin);
JLabel hourLabel = new JLabel("时");
hourLabel.setForeground(controlTextColor);
result.add(hourLabel);
minuteSpin = new JSpinner(new SpinnerNumberModel(currentMinute, 0, 59,
1));
minuteSpin.setPreferredSize(new Dimension(35, 20));
minuteSpin.setName("Minute");
minuteSpin.addChangeListener(this);
result.add(minuteSpin);
JLabel minuteLabel = new JLabel("分");
minuteLabel.setForeground(controlTextColor);
result.add(minuteLabel);
return result;
}
private JPanel createWeekAndDayPanal() {
String colname[] = { "日", "一", "二", "三", "四", "五", "六" };
JPanel result = new JPanel();
result.setFont(new Font("宋体", Font.PLAIN, 12));
result.setLayout(new GridLayout(7, 7));
result.setBackground(Color.white);
JLabel cell;
for (int i = 0; i 7; i++) {
cell = new JLabel(colname[i]);
cell.setHorizontalAlignment(JLabel.CENTER);
if (i == 0 || i == 6)
cell.setForeground(weekendFontColor);
else
cell.setForeground(weekFontColor);
result.add(cell);
}
int actionCommandId = 0;
for (int i = 0; i 6; i++)
for (int j = 0; j 7; j++) {
JButton numberButton = new JButton();
numberButton.setBorder(null);
numberButton.setHorizontalAlignment(SwingConstants.CENTER);
numberButton.setActionCommand(String.valueOf(actionCommandId));
numberButton.addActionListener(this);
numberButton.setBackground(palletTableColor);
numberButton.setForeground(dateFontColor);
if (j == 0 || j == 6)
numberButton.setForeground(weekendFontColor);
else
numberButton.setForeground(dateFontColor);
daysButton[i][j] = numberButton;
numberButton.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
if (e.getClickCount() == 2) {
closeAndSetDate();
}
}
});
result.add(numberButton);
actionCommandId++;
}
return result;
}
private JDialog createDialog(Frame owner) {
JDialog result = new JDialog(owner, "日期时间选择", true);
result.setDefaultCloseOperation(JDialog.HIDE_ON_CLOSE);
result.getContentPane().add(this, BorderLayout.CENTER);
result.pack();
result.setSize(width, height);
return result;
}
public void showDateChooser(Point position) {
Object tmpobj=SwingUtilities.getWindowAncestor(jFormattedTextField);
if(tmpobj.getClass().isInstance(new JDialog())||tmpobj.getClass().getSuperclass().isInstance(new JDialog()))
{
JDialog ownerdialog = (JDialog) SwingUtilities
.getWindowAncestor(jFormattedTextField);
Frame owner = (Frame) SwingUtilities.getWindowAncestor(ownerdialog);
if (dialog == null || dialog.getOwner() != owner) {
dialog = createDialog(owner);
}
dialog.setLocation(getAppropriateLocation(owner, position));
}
else if(tmpobj.getClass().isInstance(new JFrame())||tmpobj.getClass().getSuperclass().isInstance(new JFrame()))
{
JFrame ownerFrame = (JFrame) SwingUtilities
.getWindowAncestor(jFormattedTextField);
if (dialog == null || dialog.getOwner() != ownerFrame) {
dialog = createDialog(ownerFrame);
}
dialog.setLocation(getAppropriateLocation(ownerFrame, position));
}
flushWeekAndDay();
dialog.setVisible(true);
}
Point getAppropriateLocation(Frame owner, Point position) {
Point result = new Point(position);
Point p = owner.getLocation();
int offsetX = (position.x + width) - (p.x + owner.getWidth());
int offsetY = (position.y + height) - (p.y + owner.getHeight());
if (offsetX 0) {
result.x -= offsetX;
}
if (offsetY 0) {
result.y -= offsetY;
}
return result;
}
public void closeAndSetDate() {
setDate(c.getTime());
dialog.dispose();
}
private Calendar getCalendar() {
Calendar result = Calendar.getInstance();
result.setTime(getDate());
return result;
}
private int getSelectedYear() {
return ((Integer) yearSpin.getValue()).intValue();
}
private int getSelectedMonth() {
return ((Integer) monthSpin.getValue()).intValue();
}
private int getSelectedHour() {
return ((Integer) hourSpin.getValue()).intValue();
}
private int getSelectedMinute() {
return ((Integer) minuteSpin.getValue()).intValue();
}
private void dayColorUpdate(boolean isOldDay) {
int day = c.get(Calendar.DAY_OF_MONTH);
c.set(Calendar.DAY_OF_MONTH, 1);
int actionCommandId = day - 2 + c.get(Calendar.DAY_OF_WEEK);
int i = actionCommandId / 7;
int j = actionCommandId % 7;
if (isOldDay)
daysButton[i][j].setForeground(dateFontColor);
else
daysButton[i][j].setForeground(todayBackColor);
}
private void flushWeekAndDay() {
c.set(Calendar.DAY_OF_MONTH, 1);
int maxDayNo = c.getActualMaximum(Calendar.DAY_OF_MONTH);
int dayNo = 2 - c.get(Calendar.DAY_OF_WEEK);
for (int i = 0; i 6; i++) {
for (int j = 0; j 7; j++) {
String s = "";
if (dayNo = 1 dayNo = maxDayNo)
s = String.valueOf(dayNo);
daysButton[i][j].setText(s);
dayNo++;
}
}
dayColorUpdate(false);
}
public void stateChanged(ChangeEvent e) {
JSpinner source = (JSpinner) e.getSource();
if (source.getName().equals("Minute")) {
c.set(Calendar.MINUTE, getSelectedMinute());
return;
}
if (source.getName().equals("Hour")) {
c.set(Calendar.HOUR_OF_DAY, getSelectedHour());
return;
}
dayColorUpdate(true);
if (source.getName().equals("Year")) {
c.set(Calendar.YEAR, getSelectedYear());
}
if (source.getName().equals("Month")) {
c.set(Calendar.MONTH, getSelectedMonth() - 1);
}
flushWeekAndDay();
}
public void actionPerformed(ActionEvent e) {
JButton source = (JButton) e.getSource();
if (source.getText().length() == 0)
return;
dayColorUpdate(true);
source.setForeground(todayBackColor);
int newDay = Integer.parseInt(source.getText());
c.set(Calendar.DAY_OF_MONTH, newDay);
}
public void setDate(Date date) {
jFormattedTextField.setText(getDefaultDateFormat().format(date));
}
public Date getDate() {
try {
String dateString = jFormattedTextField.getText();
return getDefaultDateFormat().parse(dateString);
} catch (ParseException e) {
return getNowDate();
} catch (Exception ee) {
return getNowDate();
}
}
private static Date getNowDate() {
return Calendar.getInstance().getTime();
}
private static SimpleDateFormat getDefaultDateFormat() {
return new SimpleDateFormat("yyyy-MM-dd HH:mm");
}
}
测试程序：
package Demo;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class DemoForDateChooser extends JFrame {
private JFormattedTextField formattedTextField;
/**
* Launch the application
* @param args
*/
public static void main(String args[]) {
try {
DemoForDateChooser frame = new DemoForDateChooser();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Create the frame
*/
public DemoForDateChooser() {
super();
setTitle("日期选择框");
getContentPane().setLayout(null);
setBounds(100, 100, 383, 137);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
final JPanel panel = new JPanel();
panel.setLayout(null);
panel.setBounds(0, 0, 375, 107);
getContentPane().add(panel);
formattedTextField = new JFormattedTextField();
formattedTextField.setBounds(68, 48, 175, 23);
final JButton button = new JButton();
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
DateChooser mDateChooser=new DateChooser(formattedTextField);
Point p = button.getLocationOnScreen();
p.y = p.y + 30;
mDateChooser.showDateChooser(p);
formattedTextField.requestFocusInWindow();
}
});
button.setText("选择日期");
button.setBounds(249, 47, 99, 23);
panel.add(button);
final JLabel label = new JLabel();
label.setText("日期：");
label.setBounds(10, 47, 71, 23);
panel.add(label);
panel.add(formattedTextField);
//
}
}
java制作日历
package com;import java.awt.Color;import java.awt.Font;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.ItemEvent;import java.awt.event.ItemListener;import java.util.Date;import java.util.GregorianCalendar;import javax.swing.JButton;import javax.swing.JComboBox;import javax.swing.JFrame;import javax.swing.JLabel;public class Calender2 extends JFrame implements ActionListener, ItemListener { private static final long serialVersionUID = 1L; public static void main(String args[]) { try { Calender2 frame = new Calender2(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } private Date date = new Date(); private GregorianCalendar gregorianCalendar = new GregorianCalendar(); private String[] stringWeek = new String[] { "SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT" }; private String[] stringWeekCn = new String[] { "星期天", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六" }; private String[] stringMonth = new String[] { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov", "Dec" }; private String[] strSysTime = new String[6]; // 存储当前日期信息 private String[] strSysNowTime = new String[6]; // 存储运行时日期信息 private JButton[] buttonDay = new JButton[42]; private JButton[] buttonWeek = new JButton[7]; private JLabel labelMonth = new JLabel(); private JButton buttonToday = new JButton(); private JButton buttonLastMonth = new JButton(); private JButton buttonNextMonth = new JButton(); private JComboBox comboYear = new JComboBox(); private JComboBox comboMonth = new JComboBox(); public Calender2() { super("万年历"); getContentPane().setLayout(new GridLayout(8, 7, 3, 5)); setBounds(250, 200, 530, 360); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); comboYear.setForeground(new Color(0, 0, 255)); comboYear.setFont(new Font("", Font.PLAIN, 14)); for (int y = 1900; y 2101; y++) { comboYear.addItem(" " + new Integer(y).toString()); } getContentPane().add(comboYear); comboYear.addItemListener(this); final JLabel labelYear = new JLabel(); labelYear.setForeground(Color.BLUE); labelYear.setFont(new Font("新宋体", Font.PLAIN, 14)); getContentPane().add(labelYear); labelYear.setText(" 年"); comboMonth.setForeground(new Color(0, 0, 255)); comboMonth.setFont(new Font("", Font.PLAIN, 14)); for (int m = 1; m 13; m++) { comboMonth.addItem(" " + new Integer(m).toString()); } getContentPane().add(comboMonth); comboMonth.addItemListener(this); getContentPane().add(labelMonth); labelMonth.setForeground(Color.BLUE); labelMonth.setFont(new Font("新宋体", Font.PLAIN, 14)); labelMonth.setText(" 月"); getContentPane().add(buttonLastMonth); buttonLastMonth.setForeground(Color.BLUE); buttonLastMonth.setFont(new Font("新宋体", Font.PLAIN, 14)); buttonLastMonth.setText("上月"); buttonLastMonth.addActionListener(this); getContentPane().add(buttonToday); buttonToday.setForeground(Color.BLUE); buttonToday.setFont(new Font("新宋体", Font.PLAIN, 14)); buttonToday.setText("今天"); buttonToday.addActionListener(this); getContentPane().add(buttonNextMonth); buttonNextMonth.setForeground(Color.BLUE); buttonNextMonth.setFont(new Font("新宋体", Font.PLAIN, 14)); buttonNextMonth.setText("下月"); buttonNextMonth.addActionListener(this); for (int i = 0; i 7; i++) { buttonWeek[i] = new JButton(); if (i == 0 || i == 6) { buttonWeek[i].setForeground(Color.RED); } else { buttonWeek[i].setForeground(Color.BLUE); } buttonWeek[i].setFont(new Font("新宋体", Font.PLAIN, 12)); buttonWeek[i].setText(stringWeekCn[i]); getContentPane().add(buttonWeek[i]); } for (int i = 0; i 42; i++) { buttonDay[i] = new JButton(); buttonDay[i].setText(""); getContentPane().add(buttonDay[i]); } this.setResizable(false); getSysNowTimeInfo(); setNowDate(); setNowDate(); } public void setSysDate(int year, int month) { // 将日期设置为year年month月1日 gregorianCalendar.set(year, month, 1); } public void actionPerformed(ActionEvent ae) { if (ae.getSource() == buttonToday) { setNowDate(); setNowDate(); } else if (ae.getSource() == buttonLastMonth) { setDate(-1); } else { setDate(1); } } public void itemStateChanged(ItemEvent arg0) { setDate(0); } public void getSysNowTimeInfo() { // 得到程序运行时的时间信息并存储在字符串数组strSysNowTime中 date = gregorianCalendar.getTime(); strSysNowTime = (date + "").split(" "); } public void getSysTimeInfo() { // 得到系统当前的时间信息并存储在字符串数组strSysTime中 date = gregorianCalendar.getTime(); strSysTime = (date + "").split(" "); } public int getNowMonth() { int month = 0; for (int i = 0; i 12; i++) { if (strSysNowTime[1].equalsIgnoreCase(stringMonth[i])) { month = i; break; } } return month; } public int weekStrat(String strWeek) { // 返回字符串strWeek与星期中的第几天匹配，SUN为第一天 int strat = 0; for (int i = 0; i 7; i++) { if (strWeek.equalsIgnoreCase(stringWeek[i])) { strat = i; break; } } return strat; } public void setNowDate() { // 将时间设置为程序运行时的时间 setSysTime(getNowYear(), getNowMonth()); getSysTimeInfo(); setDayNull(); getDay(getMonthDays(getNowYear(), getNowMonth() - 1), getMonthDays( getNowYear(), getNowMonth()), weekStrat(strSysTime[0]), getNowDay()); comboYear.setSelectedIndex(getNowYear() - 1900); comboMonth.setSelectedIndex(getNowMonth()); } public void setDate(int move) { // 将时间设置为选中的年月增加move个月之后的时间 setSysTime(getYear(), getMonth() + move); getSysTimeInfo(); setDayNull(); getDay(getMonthDays(getYear(), getMonth() + move - 1), getMonthDays( getYear(), getMonth() + move), weekStrat(strSysTime[0]), -1); if (move != 0) { if (getMonth() == 0 move 0) { move = 11; comboYear.setSelectedIndex(getYear() - 1901); } else if (getMonth() == 11 move 0) { move = -11; comboYear.setSelectedIndex(getYear() - 1899); } else { comboYear.setSelectedIndex(getYear() - 1900); } comboMonth.setSelectedIndex(getMonth() + move); } } public void setSysTime(int year, int month) { gregorianCalendar.set(year, month, 1); } public int getNowYear() { return Integer.parseInt(strSysNowTime[5]); } public int getNowDay() { return Integer.parseInt(strSysNowTime[2]); } public int getYear() { return comboYear.getSelectedIndex() + 1900; } public int getMonth() { return comboMonth.getSelectedIndex(); } public void setDayNull() { for (int d = 0; d 42; d++) { buttonDay[d].setText(""); } } public void getDay(int lastMonDays, int monthDays, int startWeek, int day) { // 设置日期颜色并打印 for (int d = 0; d startWeek + 1; d++) { buttonDay[d].setForeground(Color.GRAY); buttonDay[d].setText((lastMonDays - startWeek) + d + 1 + ""); } for (int d = startWeek; d startWeek + monthDays; d++) { if ((d - startWeek + 1) == day) { buttonDay[d].setForeground(Color.blue); } else if (d % 7 == 0 || d % 7 == 6) { buttonDay[d].setForeground(Color.RED); } else { buttonDay[d].setForeground(Color.BLACK); } buttonDay[d].setText(d - startWeek + 1 + ""); } for (int d = monthDays + startWeek; d 42; d++) { buttonDay[d].setForeground(Color.GRAY); buttonDay[d].setText(d - (monthDays + startWeek) + 1 + ""); } } public int getMonthDays(int year, int month) { // 返回year年month月的天数 switch (month) { case 3: case 5: case 8: case 10: return 30; case 1: if (gregorianCalendar.isLeapYear(year)) { return 29; } else { return 28; } default: return 31; } }}
怎么用JAVA编写万年历！
/*
题目:输出任意年份任意月份的日历表(公元后)
思路:
1.已知1年1月1日是星期日,1 % 7 = 1 对应的是星期日,2 % 7 = 2 对应的是星期一,以此类推;
2.计算当年以前所有天数+当年当月1号之前所有天数;
a.年份分平年闰年,平年365天,闰年366天;
b.闰年的判断方法year % 400 == 0 || (year % 100 != 0 year % 4 == 0)若为真,则为闰年否则为平年;
c.定义平年/闰年数组,包含各月天数;
d.遍历数组求和,计算当年当月前总天数;
e.当年以前所有天数+当年当月前总天数+1即为1年1月1日到当年当月1日的总天数;
3.总天数对7取模,根据结果判断当月1号是星期几,输出空白区域;
4.输出当月日历表,逢星期六换行
*/
import java.util.Scanner;
class FindMonthList {
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
System.out.println("请输入年份:");
int year = sc.nextInt(); //年份
if (year 1) { //判断非法输入年份
System.out.println("输入错误!");
return;
}
System.out.println("请输入月份:");
int month = sc.nextInt(); //月份
if (month 1 || month 12) { //判断非法输入月份
System.out.println("输入错误!");
return;
}
//输出表头
System.out.println("-------" + year + " 年 " + month + " 月 " + "-------");
System.out.println();
System.out.println("日 一 二 三 四 五 六");
//计算当前年份以前所有天数beforeYearTotalDay;每4年一个闰年,闰年366天,平年365天
int beforeYearTotalDay = ((year - 1) / 4 * 366) + (year-1 - ((year - 1) / 4)) * 365;
int[] arrLeapYear = {0,31,29,31,30,31,30,31,31,30,31,30,31}; //闰年各月天数 int数组
int[] arrNormalYear = {0,31,28,31,30,31,30,31,31,30,31,30,31}; //平年各月天数 int数组
int beforeMonthTotalDay = 0; //定义本年当月之前月份的总天数
if (year % 400 == 0 || (year % 100 != 0 year % 4 == 0)) { //判断当前年份是否是闰年
for (int i = 0 ; i month ; i ++ ) { //for循环计算当月之前总天数
//计算当前月份之前的所有天数
beforeMonthTotalDay = beforeMonthTotalDay + arrLeapYear[i];
}
//判断当月1日是星期几
int totalDay = beforeYearTotalDay + beforeMonthTotalDay + 1;
int week = totalDay % 7;//已知1年1月1日是星期日,即模7得1对应的是星期日
for (int i = 0 ; i (week - 1 + 7) % 7 ; i ++) { //如果写成i (week-1)会出现i-1的情况
System.out.print(" ");//输出开头空白
}
for (int i = 1 ;i = arrLeapYear[month] ;i ++ ) { //for循环输出各月天数
System.out.print(i + " ");
if (i 10 ) { //小于10的数补一个空格,以便打印整齐
System.out.print(" ");
}
if (i % 7 == ((7-(week - 1)) % 7 ) || i == arrLeapYear[month]) {//每逢星期六/尾数换行
System.out.println();
}
}
} else { //不是闰年就是平年
for (int i = 0 ; i month ; i ++ ) { //for循环计算出当月之前月份总天数
beforeMonthTotalDay = beforeMonthTotalDay + arrNormalYear[i];
}
//判断当月1日是星期几
int totalDay = beforeYearTotalDay + beforeMonthTotalDay + 1;
int week = totalDay % 7;//已知1年1月1日是星期日,即模7得1对应的是星期日
for (int i = 0 ; i (week - 1 + 7) % 7 ; i ++) { //如果写成i (week-1)会出现i-1的情况
System.out.print(" ");//输出开头空白
}
for (int i = 1 ;i = arrNormalYear[month] ;i ++ ) {//for循环输出各月天数
System.out.print(i + " ");
if (i 10 ) { //小于10的数补一个空格,以便打印整齐
System.out.print(" ");
}
if (i % 7 == ((7-(week - 1)) % 7 ) || i == arrNormalYear[month]) {//每逢星期六/尾数换行
System.out.println();
}
}
}
}
}
效果：
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发布于：2022-11-28，除非注明，否则均为原创文章，转载请注明出处。