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");}} |
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; }} |
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 }} |
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
