Java 日历的小程序

来源：未知责任编辑：智问网络发表时间:2013-11-04 19:49　点击:次

Java写的日历小程序，算法效率虽然不算很高，却是简单实用的

CalendarBean.java

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;   
        }   
}

CalendarFrame.java

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()   
       {   
           JPanel pCenter=new JPanel();   
             
         //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);   
           add(scrollPane,BorderLayout.CENTER);// 窗口添加scrollPane在中心区域   
           add(pNorth,BorderLayout.NORTH);// 窗口添加pNorth 在北面区域   
           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" );   
       }   
}

CalendarMainClass .java

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);  
        }   
}