Java实现简单日历小程序 Java图形界面小日历开发

今天给大家介绍一下如何用java swing开发一款简单的小日历，下面我们来看代码：
首先创建一个calendarbean类，用于基本的日期计算：

package other1; 
 
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 date=calendar.getinstance();   
      date.set(year,month-1,1);   
      int week=date.get(calendar.day_of_week)-1;   
      int day=0;   
       
      //判断大月份  
      if(month==1||month==3||month==5||month==7  
       ||month==8||month==10||month==12)   
      {   
        day=31;   
      }   
        
      //判断小月  
      if(month==4||month==6||month==9||month==11)   
      {   
        day=30;   
      }   
        
      //判断平年与闰年  
      if(month==2)   
      {   
        if(((year%4==0)&&(year%100!=0))||(year%400==0))   
        {   
          day=29;   
        }   
          
        else   
        {   
          day=28;   
        }   
      }   
        
      for(int i=week,n=1;i<week+day;i++)   
      {   
          a[i]=string.valueof(n) ;   
          n++;   
      }        
      return a;   
    }   
} 

然后再创建一个主界面类，用于界面的实现：

package other1; 
 
import java.awt.*;   
import java.awt.event.*;   
import javax.swing.*;  
  
public class calendarframe extends jframe implements actionlistener   
{   
    jlabel labelday[]=new jlabel[42];   
    jtextfield text=new jtextfield(10);  
    jbutton titlename[]=new jbutton[7];   
    jbutton button = new jbutton();  
    string name[]={"日","一","二","三", "四","五","六"};   
    jbutton nextmonth,previousmonth;   
    int year=1996,month=1; //启动程序显示的日期信息  
    calendarbean calendar;   
    jlabel showmessage=new jlabel("",jlabel.center);   
    jlabel lbl1 = new jlabel("请输入年份：");  
    jlabel lbl2=new jlabel("   ");  
  
    public calendarframe()   
    { 
    setbackground(new color(0, 128, 128));   
      jpanel pcenter=new jpanel();   
      pcenter.setbackground(new color(0, 139, 139)); 
        
     //将pcenter的布局设置为7行7列的gridlayout 布局。   
      pcenter.setlayout(new gridlayout(7,7));   
        
     //pcenter添加组件titlename[i]  
      for(int i=0;i<7;i++)   
      {   
        titlename[i]=new jbutton(name[i]);   
        pcenter.add(titlename[i]);   
      }   
  
     //pcenter添加组件labelday[i]  
      for(int i=0;i<42;i++)   
      {   
        labelday[i]=new jlabel("",jlabel.center);   
        pcenter.add(labelday[i]);  
      }   
        
      text.addactionlistener(this);  
      calendar=new calendarbean();   
      calendar.setyear(year);   
      calendar.setmonth(month);   
      string day[]=calendar.getcalendar();   
  
      for(int i=0;i<42;i++)   
      {   
        labelday[i].settext(day[i]);   
      }   
  
      nextmonth=new jbutton("下月");   
      previousmonth=new jbutton("上月");   
      button=new jbutton("确定");  
        
      //注册监听器  
      nextmonth.addactionlistener(this);   
      previousmonth.addactionlistener(this);   
      button.addactionlistener(this);  
        
      jpanel pnorth=new jpanel(),  
      psouth=new jpanel();   
      pnorth.add(showmessage);   
      pnorth.add(lbl2);   
      pnorth.add(previousmonth);   
      pnorth.add(nextmonth);   
      psouth.add(lbl1);      
      psouth.add(text);  
      psouth.add(button);  
      showmessage.settext("日历："+calendar.getyear()+"年"+ calendar.getmonth()+"月" );  
      scrollpane scrollpane=new scrollpane();   
      scrollpane.add(pcenter);   
      getcontentpane().add(scrollpane,borderlayout.center);// 窗口添加scrollpane在中心区域   
      getcontentpane().add(pnorth,borderlayout.north);// 窗口添加pnorth 在北面区域   
      getcontentpane().add(psouth,borderlayout.south);// 窗口添加psouth 在南区域。  
  
    }   
     
    public void actionperformed(actionevent e)   
    {   
      if(e.getsource()==nextmonth)   
      {   
        month=month+1;   
        if(month>12)   
        month=1;   
        calendar.setmonth(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);   
        string day[]=calendar.getcalendar();   
  
        for(int i=0;i<42;i++)   
        {   
          labelday[i].settext(day[i]);   
        }   
       }   
      else if(e.getsource()==button)  
      {  
        month=month+1;         
        if(month>12)          
           month=1;         
        calendar.setyear(integer.parseint(text.gettext()));         
        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" );   
    }   
} 

最后用一个类调用即可：

package other1; 
 
import javax.swing.jframe;  
import javax.swing.uimanager;  
  
public class calendarmainclass   
{   
    public static void main(string args[])   
    {   
       try {  
         uimanager.setlookandfeel("com.sun.java.swing.plaf.windows.windowslookandfeel"); //windows界面风格  
       }catch (exception e) {  
        e.printstacktrace();  
       }  
       calendarframe frame=new calendarframe();   
       frame.setbounds(100,100,360,300);   
       frame.settitle("日历小程序");  
       frame.setlocationrelativeto(null);//窗体居中显示  
       frame.setvisible(true);   
       frame.setdefaultcloseoperation(jframe.exit_on_close);  
    }   
} 

运行结果如下：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。