「java简易日历」java实现简单的日历思路
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本文目录一览：
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
帮忙用JAVA编写一个简单的日历
这是我几年前写的
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
public class $ {
private static int[] DAYS = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
public static void main(String[] args) {
long l1 = System.currentTimeMillis();
List data = rili(2015, 1, 2015, 12);
long l2 = System.currentTimeMillis();
for (int i = 0; i data.size(); i++) {
System.out.println(data.get(i));
}
System.out.println((l2 - l1) + "MS");
}
private static List rili(int startYear, int startMonth, int endYear, int endMonth) {
if (startYear endYear || (startYear == endYear startMonth endMonth)) {
return null;
}
List data = new ArrayList();
for (int ii = startYear; ii = endYear; ii++) {
int startM = startMonth - 1;
int endM = endMonth - 1;
if (startYear endYear) {
if (ii == endYear) {
endM = 11;
} else {
startM = 0;
}
}
for (int i = startM; i = endM; i++) {
data.add("-----------------------" + ii + "年" + (i + 1) + "月-----------------------");
data.add("日\t一\t二\t三\t四\t五\t六");
int day = days(ii, i);
StringBuffer buf = new StringBuffer();
int idx = 1;
while (idx = day) {
int len = 0;
if (idx == 1) {
Calendar c = Calendar.getInstance();
c.set(ii, i, idx);
int xingqi = c.get(Calendar.DAY_OF_WEEK);
len = getLen(xingqi);
buf.append(addBlank(len));
}
buf.append(idx++);
for (int k = len + 1; k 7; k++) {
if (idx day) {
break;
}
buf.append("\t" + (idx++));
}
buf.append("\n");
}
data.add(buf);
}
}
return data;
}
private static StringBuffer addBlank(int len) {
StringBuffer buf = new StringBuffer();
for (int index = 0; index len; index++) {
buf.append("\t");
}
return buf;
}
private static int getLen(int xingqi) {
return xingqi == Calendar.SUNDAY ? 0 : xingqi - 1;
}
public static int days(int year, int month) {
if (month != 1) {
return DAYS[month];
}
if ((year % 4 == 0 year % 100 != 0) || year % 400 == 0) {
return 29;
}
return DAYS[month];
}
}
如何用JAVA编写出一个简单的日历
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);
}
}
用一个类来实现
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。
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