import java.text.SimpleDateFormat;
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import java.util.Calendar;
public class TestDate {
public static final String[] weeks = { "日", "一", "二", "三", "四", "五", "六" };
public static void main(String[] args) {
Calendar c = Calendar.getInstance();
c.set(Calendar.YEAR,2011);//2011年
c.set(Calendar.MONTH,0);//java中Calendar類，月從0開始， 0代表一月
c.set(Calendar.DATE,1);//1號
int day = c.get(Calendar.DAY_OF_WEEK);//獲致是本周的第幾天地, 1代表星期天...7代表星期六
System.out.println(new SimpleDateFormat( "yyyy-MM-dd ").format(c.getTime()));
System.out.println("星期" + weeks[day-1]);
}
}
把以上測試代碼寫作一個方法 方法的參數(shù)名為年月日， 即可。當然Calendar 還有很多功能，比如一周的第幾天，一年的第幾個月……
import java.io.*;
class putout{
public void putout(int f,int x,int y){
int i;
int a[]= new int[40];
System.out.println(" 日 一 二 三 四 五 六 "+" "+f+"月");
for (i=0;ix;i++)
{System.out.print(" "); }
for(i=x;ix+y;i++)
a[i]=i-x+1;
for(i=x;ix+y;i++)
{
if ((i%7==0)(i0))
System.out.print("\n");
if (a[i]10)
System.out.print(" "+a[i]);
else System.out.print(" "+a[i]);
}
System.out.println("\n");
}
}
class st{
public static void main(String args[])throws IOException{
putout p=new putout();
int year,mouth,y=1,t,i;
InputStreamReader ir;
BufferedReader in;
ir=new InputStreamReader(System.in);
in=new BufferedReader(ir);
System.out.print("請輸入一個年份：");
String s=in.readLine();
year=Integer.parseInt(s);
if((year%4==0 year%100!=0)||(year%400==0))
mouth=1;
else
mouth=0;
y=year;
for(i=1;iyear;i++)
{if((i%4==0 i%100!=0)||(i%400==0))
y++;}
y=y%7;
for(i=1;i13;i++){
switch(i){
case 1: {p.putout(1,y,31);y=(y+31)%7;break;}
case 2: {p.putout(2,y,28+mouth);y=(y+28+mouth)%7;break;}
case 3: {p.putout(3,y,31);y=(y+31)%7;break;}
case 4: {p.putout(4,y,30);y=(y+30)%7;break;}
case 5: {p.putout(5,y,31);y=(y+31)%7;break;}
case 6: {p.putout(6,y,30);y=(y+30)%7;break;}
case 7: {p.putout(7,y,31);y=(y+31)%7;break;}
case 8: {p.putout(8,y,31);y=(y+31)%7;break;}
case 9: {p.putout(9,y,30);y=(y+30)%7;break;}
case 10: {p.putout(10,y,31);y=(y+31)%7;break;}
case 11: {p.putout(11,y,30);y=(y+30)%7;break;}
case 12: {p.putout(12,y,31);y=(y+31)%7;break;}
}
}
}
}
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("輸入年月(年和月用非數(shù)字隔開:如2015.1)(什么都不輸入直接退出)");
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();
//?這個月的1號是星期幾
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();
}
}
}
按照你的要求編寫的Java swing 帶界面的萬年歷代碼如下
//日歷
import?java.awt.BorderLayout;
import?java.awt.Color;
import?java.awt.Font;
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("簡單日歷");
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.setFont(new?Font(null,Font.BOLD,20));
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.setFont(new?Font(null,Font.BOLD,20));
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?1:?
case?3:?
case?5:?
case?7:
case?8:?
case?10:?
case?12:
return?31;?
case?2:?
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].setFont(new?Font(null,Font.BOLD,20));
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].setFont(new?Font(null,Font.BOLD,20));
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);
jl[i].setFont(new?Font(null,Font.BOLD,20));
if((i+1)%7==0?||?(i+1)%7==1){
jl[i].setForeground(Color.RED);
}else?if((i-7-emptyFirst+1)==nowdaymonth==nowmonthyear==nowyear)
jl[i].setForeground(Color.BLUE);
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].setFont(new?Font(null,Font.BOLD,20));
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].setFont(new?Font(null,Font.BOLD,20));
jl[i].setForeground(Color.GRAY);
jl[i].setBorder(BorderFactory.createEtchedBorder());
jp3.add(jl[i]);
}
}
}
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