wnl.java

可以查询日期的

import java.util.Calendar;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Wnl extends JFrame implements MouseListener
{
   int year,month,day;                       
   JTextField showDay[];             
   JLabel title[];                   
   Calendar 日历;
   int 星期几;        
   Month 负责改变月;		//定义类对象 
   Year  负责改变年;
   String 星期[]={"星期日","星期一","星期二","星期三","星期四","星期五","星期六"};
   JPanel panel;    
   public  Wnl(int year,int month,int day)		
   { 
     panel=new JPanel();
     JPanel Centerpanel=new JPanel();
     JPanel Northpanel=new JPanel();
     Centerpanel.setLayout(new GridLayout(7,7));                                             
     this.year=year;
     this.month=month;
     this.day=day;
     负责改变年=new Year(this);			//调用了子程序
     负责改变年.setYear(year);
     负责改变月=new Month(this);
     负责改变月.setMonth(month);
  
     title=new JLabel[7];                         
     showDay=new JTextField[42];                   
     for(int j=0;j<7;j++)  			//排列星期                       
       {
         title[j]=new JLabel();
         title[j].setText(星期[j]);
         title[j].setBorder(BorderFactory.createRaisedBevelBorder());
         Centerpanel.add(title[j]);
       } 
     title[0].setForeground(Color.green);
     title[6].setForeground(Color.yellow);

     for(int i=0;i<42;i++)                        
       {
         showDay[i]=new JTextField();
         showDay[i].setEditable(false);
         Centerpanel.add(showDay[i]);
       }
         
     日历=Calendar.getInstance();		//将系统时间赋给日历变量
     Box box=Box.createHorizontalBox();          
     box.add(负责改变年);
     box.add(负责改变月);
     Northpanel.add(box);
     panel.setLayout(new BorderLayout());
     panel.add(Northpanel,BorderLayout.NORTH);
     panel.add(Centerpanel,BorderLayout.CENTER);
     panel.add(new Label("请在年份输入框输入所查年份(负数表示公元前),并回车确定"),
                  BorderLayout.SOUTH) ;
     panel.validate();
     Container con=getContentPane();         
     con.add(panel,BorderLayout.CENTER);
     con.validate();
     setVisible(true);       
     设置日历牌(year,month);
     addWindowListener(new WindowAdapter()   	//设置JFrame窗口
                    { public void windowClosing(WindowEvent e)
                       {
                         System.exit(0);
                       }
                    });
    setVisible(true);
    setBounds(100,50,524,285);
    validate();		//设置窗口长期有效
   } 
  public void 设置日历牌(int year,int month)
   {
     日历.set(year,month-1,1);              
     
     星期几=日历.get(Calendar.DAY_OF_WEEK)-1;
     if(month==1||month==3||month==5||month==7
                        ||month==8||month==10||month==12)
        {
            排列号码(星期几,31);         
        }
     else if(month==4||month==6||month==9||month==11)
        {
            排列号码(星期几,30);
        }
     else if(month==2)
        {
         if((year%4==0&&year%100!=0)||(year%400==0))  
           {
             排列号码(星期几,29);
           }
         else
           {
             排列号码(星期几,28);
           }
       }
   } 
  public void 排列号码(int 星期几,int 月天数)
   {
      for(int i=星期几,n=1;i<星期几+月天数;i++)
             {
               showDay[i].setText(""+n);
               
               if(i%7==6)
                 {
                  showDay[i].setForeground(Color.blue);  
                 }
               if(i%7==0)
                 {
                  showDay[i].setForeground(Color.red);  
                 }
               n++; 
             }
       for(int i=0;i<星期几;i++)
             {
                showDay[i].setText("");
             }
       for(int i=星期几+月天数;i<42;i++)
             {
                showDay[i].setText("");
             }
   }
 public int getYear()
   {
    return year;
   } 
 public void setYear(int y)
   {
   }
 public int getMonth()
   {
    return month;
   }
 public void setMonth(int m)
   {
   }
 public int getDay()
   {
    return day;
   }
 public void setDay(int d)
   {
   }
 public void mousePressed(MouseEvent e)             
   {
   }
 public void mouseClicked(MouseEvent e)
   {
   }
 public void mouseReleased(MouseEvent e)
   {
   }
 public void mouseEntered(MouseEvent e)
   {
   }
 public void mouseExited(MouseEvent e)
   {
   }
 
 public static void main(String args[])
   {
       Calendar calendar=Calendar.getInstance();   	//获取系统时间
       int y=calendar.get(Calendar.YEAR);           
       int m=calendar.get(Calendar.MONTH)+1;        
       int d=calendar.get(Calendar.DAY_OF_MONTH);
       new Wnl(y,m,d); 
       //new CalendarPad(Calendar.YEAR,Calendar.MONTH,Calendar.DAY_OF_MONTH);
   }
}