本文实例讲述了java实现的日历功能。分享给大家供大家参考，具体如下：
应用名称：java日历
用到的知识：java gui编程，日期操作
开发环境：win8+eclipse+jdk1.8
功能说明：一个很简单的万年历，可以选择年份和月份，也可以用按钮翻页，日历会实时更新日期，最下方会显示当前操作系统的时间。
效果图：
源代码：
calendarframe.java
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import java.awt.borderlayout;
import java.awt.gridlayout;
import java.awt.event.actionevent;
import java.awt.event.actionlistener;
import java.text.simpledateformat;
import java.util.date;
import javax.swing.jbutton;
import javax.swing.jcombobox;
import javax.swing.jframe;
import javax.swing.jlabel;
import javax.swing.jpanel;
import javax.swing.border.bevelborder;
import javax.swing.border.softbevelborder;
public class calendarframe extends jframe implements actionlistener{
/**
* @author nut
* 2016.01.13
*/
private static final long serialversionuid = -7260798316896145633l;
jlabel labelday[] = new jlabel[42];
jbutton titlename[] = new jbutton[7];
string name[]={"日","一","二","三","四","五","六"};
jbutton nextmonth,previousmonth;
jcombobox choiceyear,choicemonth;
calendarbean calendar;
jlabel showyear,showmonth;
jlabel showmessage=new jlabel("",jlabel.center);
int year = 2011,month=2;
//构造方法初始化界面
public calendarframe(){
jpanel pcenter = new jpanel();
pcenter.setlayout(new gridlayout(7,7));
//星期栏
for(int i=0;i<7;i++){
titlename[i]=new jbutton(name[i]);
titlename[i].setborder(new softbevelborder(bevelborder.raised));
pcenter.add(titlename[i]);
}
//日期栏
for(int i=0;i<42;i++){
labelday[i]=new jlabel("",jlabel.center);
labelday[i].setborder(new softbevelborder(bevelborder.lowered));
pcenter.add(labelday[i]);
}
//年月选择栏
choiceyear=new jcombobox();
choicemonth=new jcombobox();
showyear=new jlabel("年");
showmonth=new jlabel("月 ");
for(int i=1990;i<2050;i++)
choiceyear.additem(i);
choiceyear.addactionlistener(this);
for(int i=1;i<=12;i++)
choicemonth.additem(i);
choicemonth.addactionlistener(this);
calendar=new calendarbean();
nextmonth=new jbutton("下月");
previousmonth=new jbutton("上月");
nextmonth.addactionlistener(this);
previousmonth.addactionlistener(this);
jpanel pnorth=new jpanel(),
psouth=new jpanel();
pnorth.add(choiceyear);
pnorth.add(showyear);
pnorth.add(choicemonth);
pnorth.add(showmonth);
pnorth.add(previousmonth);
pnorth.add (nextmonth);
psouth.add(showmessage);
add(pcenter,borderlayout.center);
add(pnorth,borderlayout.north);
add(psouth,borderlayout.south);
setyearandmonth(year,month);
setdefaultcloseoperation(dispose_on_close);
}
public void setyearandmonth(int y,int m){
calendar.setyear(y);
calendar.setmonth(m);
string day[]=calendar.getcalendar();
for(int i=0;i<42;i++)
labelday[i].settext(day[i]);
simpledateformat df = new simpledateformat("yyyy年mm月dd日 eeee");//设置日期格式
showmessage.settext("系统时间："+df.format(new date()));
}
//事件动作
public void actionperformed(actionevent e){
if(e.getsource()==nextmonth){
month=month +1;
if(month>12)
month=1;
calendar.setmonth(month);
choicemonth.setselecteditem(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);
choicemonth.setselecteditem(month);
string day[]=calendar.getcalendar();
for(int i=0;i<42;i++){
labelday[i].settext(day[i]);
}
}
//选择年份
else if (e.getsource()==choiceyear){
calendar.setyear((integer) choiceyear.getselecteditem());
string day[]=calendar.getcalendar();
for(int i=0;i<42;i++){
labelday[i].settext(day[i]);
}
}
//选择月份
else if (e.getsource()==choicemonth){
calendar.setmonth((integer) choicemonth.getselecteditem());
string day[]=calendar.getcalendar();
for(int i=0;i<42;i++){
labelday[i].settext(day[i]);
}
}
// showmessage.settext("日历："+calendar.getyear()+"年"+calendar.getmonth()+"月");
}
}
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calendarbean.java
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import java.util.calendar;
public class calendarbean {
string day[];
int year = 2005,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;
}
}
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calendarmainclass.java
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public class calendarmainclass{
public static void main(string args[])
{
calendarframe frame = new calendarframe();
frame.setbounds(100,100,360,300);
frame.settitle("java日历");
frame.setvisible(true);
frame.setyearandmonth(1990,1);//设置日历初始值为1990年1月
}
}
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ps：这里再为大家推荐几款时间及日期相关工具供大家参考使用：
unix时间戳(timestamp)转换工具：https://tool.zzvips.com/t/timestamp/
在线秒表计时器：https://tool.zzvips.com/t/miaobiao/
在线万年历：https://tool.zzvips.com/t/wannianli/
希望本文所述对大家java程序设计有所帮助。
原文链接：https://blog.csdn.net/C_jian/article/details/50513386