[学习交流] java日历小程序

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);
      }
}

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[学习交流] java日历小程序

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