calendar.java

java GUI使用实现的日历

 		if((year%400==0)||(year%4==0&&year%100!=0))
 			return true;
 		else
 			return false; 
 	}
 	
 	
 	//judge the start day of a month
 	public int GetStartDay(int year,int month)
 	{
 		//get total number of day since1/1/0000
 		int startday0001=-32768;
 		long totalnumofdays=GetTotalNumOfDays(year,month);
 		
 		//return the start day
 		return (int)((totalnumofdays+startday0001)%7);
 	}
 	
 	
 	//judge the days of a year
	public  long GetTotalNumOfDays(int year,int month)
 	{
 		long total=0;
 		
 		//get the total days from -32767 to year
 		for(int i=-32767;i<year;i++)
 		{
 			if(IsLeapYear(i))
 				total=total+366;
 			else
 				total=total+365;
 		}
 			
			//Add days from jan to the month prior to the calendar month
			for(int i=1;i<month;i++)
				total=total+GetNumOfDaysInMonth(year,i);
					
			return total;
 	}
 	
 	
 	//judge the days of a month
  	public int GetNumOfDaysInMonth(int year,int month)
 	{
 		if(month==1 || month==3 || month==5 || month==7 || month==8 || month==10 ||month==12)
 			return 31;
 		if(month==4 || month==6 || month==9 || month==11)
 			return 30;
 		if(month==2)
 		{
 			if(IsLeapYear(year))
 				return 29;
 			else
 				return 28; 
 		}
 		return 0;
 	}
 	
 	public void WriteRecord()
 	{
 		String content;
 		content=CenterText.getText();	
 		int n=content.length();
 		char[] contentarr=new char[n];
 		try
 		{
 			int i=0;
 			for(i=0;i<n;i++)
 			{
 				contentarr[i]=content.charAt(i);
 			}
 			File Diary = new File("Diary");
 			Diary.mkdir();
 			File myfile=new File("Diary\\"+key+".txt");
 			FileWriter Record=new FileWriter(myfile);
 			for(i=0;i<contentarr.length;i++)
 			{
 				Record.write(contentarr[i]);
 			}
 			Record.close();
 			JOptionPane.showMessageDialog(this,"Save success!");
		}
		catch(IOException ex)
		{
		}
 	}
 	
 	public void ReadRecord()
 	{
 		try
 		{
 			String content="";
 			File myfile=new File("Diary\\"+key+".txt");
 			FileReader Record=new FileReader(myfile);
 			if(myfile.exists())
 			{
 				long b=myfile.length();
 				//char[] contentarr=new char[b];
 				int n=JOptionPane.showConfirmDialog(this,"Today has logs,are you read?","Confirm",JOptionPane.YES_NO_CANCEL_OPTION);
 				if(n==JOptionPane.YES_OPTION)
 				{
 					while((b=Record.read())!=-1)
 					{
 						content=content+(char)b;
 					}
 					CenterText.setText(content);
 				}
 			}	
 			Record.close();
 		}
 		catch(IOException ex)
		{
			CenterText.setText("Today has not logs.");
		}
 	}
 	
 	public void DeleteFile()
 	{
 		String filepath="Diary\\"+key+".txt";
 		File myfile=new File(filepath);

 		int n=JOptionPane.showConfirmDialog(this,"Are you sure delete the file?","Confirm",JOptionPane.YES_NO_CANCEL_OPTION);
 		if(n==JOptionPane.YES_OPTION)
 		{
 			if(myfile.exists())
 			{
 				Runtime rt = Runtime.getRuntime();
				try 
				{
					rt.exec("cmd /c del "+filepath);
				} 
				catch (IOException e) 
				{
					e.printStackTrace();
				}
 				JOptionPane.showMessageDialog(this,"Delete successed!");
 				
 				CenterText.setText("Today has not logs.");
 			}
 			else
 			{
 				JOptionPane.showMessageDialog(this,"The file doesn't exist,delete failured!");
 			}
 		}
 		
	}
 	
 	public void AboutActionListenerWay()
 	{
 		try
 		{
 			prioryear=Integer.parseInt(YearText.getText());
 			priormonth=MonthCombobox.getSelectedIndex()+1;
 			String StrYearText=YearText.getText();
 			changeyearmessage=Integer.parseInt(StrYearText);
 			
 			changemonthmessage=MonthCombobox.getSelectedIndex()+1;
 			
 			monthafterquery=changemonthmessage;
 			yearafterquery=changeyearmessage;
 			SwitchMonth(changemonthmessage);
 				
 			ShowDate.setText(SwitchMonth+" "+","+" "+String.valueOf(changeyearmessage));
 					
 			PrintMonth(changeyearmessage,changemonthmessage);
 			ischange=true;	
 		}
 		catch(Exception ee)
 		{
 			JOptionPane.showMessageDialog(this,"The input format doesn't match","Error",JOptionPane.ERROR_MESSAGE);
 		}
 	}
 	
 	//do actonlistener things
 	public void actionPerformed(ActionEvent eAction)
 	{
 		String ActionCommand=eAction.getActionCommand();
 		
 		//Handle button events
 		if(eAction.getSource() instanceof JButton)
 		{
 			//Handle the query
 			if("Query".equals(ActionCommand))
 			{
 				try
 				{
 					AboutActionListenerWay();
 				}
 				catch(Exception ee)
 				{
 					JOptionPane.showMessageDialog(this,"The input format doesn't match","Error",JOptionPane.ERROR_MESSAGE);
 				}
 			}
 			
 			//Handle prior month
 			if("prior".equals(ActionCommand))
 			{
 					if(priormonth>1)
 					{
 						priormonth=priormonth-1;
 					}
 					else
 					{
 						priormonth=12;
 						prioryear=prioryear-1;
 					}
 					PrintMonth(prioryear,priormonth,day);
 					SwitchMonth(priormonth);
 					ShowDate.setText(SwitchMonth+" , "+prioryear);
 					NorthMonthDayYear.setText(">>"+SwitchMonth+","+day+","+prioryear+"<<");
 					key=prioryear+"_"+SwitchMonth+"_"+day;
 					ischange_priornext=true;
 			}
 			
 			//Handle next month
 			if("next".equals(ActionCommand))
 			{
 					if(priormonth<12)
 					{
 						priormonth=priormonth+1;
 					}
 					else
 					{
 						priormonth=1;
 						prioryear=prioryear+1;
 					}
 					PrintMonth(prioryear,priormonth,day);
 					SwitchMonth(priormonth);
 					ShowDate.setText(SwitchMonth+" , "+prioryear);
 					NorthMonthDayYear.setText(">>"+SwitchMonth+","+day+","+prioryear+"<<");
 					key=prioryear+"_"+SwitchMonth+"_"+day;
 					ischange_priornext=true;

 			}
 			
 			//Handle the "Go to today"
 			if("Go to today".equals(ActionCommand))
 			{
 				PrintMonth(year,month,day);
 				YearText.setText("");
 				MonthCombobox.setSelectedIndex(0);
 				
 				SwitchMonth(month);
 				
 				ShowDate.setText(SwitchMonth+" "+","+" "+String.valueOf(year));
 				NorthMonthDayYear.setText(">>"+SwitchMonth+","+day+","+year+"<<");
 				
 				key=year+"_"+SwitchMonth+"_"+day;
 				
 				priormonth=month;
 				prioryear=year;
 				
 				ischange=false;
 			}
 			
 			//Handle the "Save"
 			if("Save".equals(ActionCommand))
 			{
 				WriteRecord();
 			}
 			
 			
 			if("Delete".equals(ActionCommand))
 			{
 				DeleteFile();
 			}
 		}
 		
 		//Handle JTextField events
 		if(eAction.getSource() instanceof JTextField)
 		{
 			//Handle the query
 
 			AboutActionListenerWay();
 		}
 	} 
 		
 	public void mousePressed(MouseEvent eMouse)
 	{
 		int day;
 		
 		try
 		{
 			//Handle ShowDays[] events
			
 			if(ischange==false)
 			{
 
 				JTextField source=(JTextField)eMouse.getSource();
		
				day=Integer.parseInt(source.getText());
				if(ischange_priornext==false)
 				{
					NorthMonthDayYear.setText(">>"+SwitchMonth+","+day+","+year+"<<");
				
					key=year+"_"+SwitchMonth+"_"+day;
				}
				else
				{
					NorthMonthDayYear.setText(">>"+SwitchMonth+","+day+","+prioryear+"<<");
 					
 					key=prioryear+"_"+SwitchMonth+"_"+day;
				}
 			}
 			else
 			{
 				JTextField source=(JTextField)eMouse.getSource();
		
				day=Integer.parseInt(source.getText());
 				
 				if(ischange_priornext==false)
 				{
 					SwitchMonth(changemonthmessage);
 				
 					NorthMonthDayYear.setText(">>"+SwitchMonth+","+day+","+changeyearmessage+"<<");
 			
 					key=changeyearmessage+"_"+SwitchMonth+"_"+day;
 				}
 				else
 				{
 					SwitchMonth(priormonth);
 					
 					NorthMonthDayYear.setText(">>"+SwitchMonth+","+day+","+prioryear+"<<");
 			
 					key=prioryear+"_"+SwitchMonth+"_"+day;
 				}
 			}

 			ReadRecord();
 		}
 		catch(Exception ee)
        {
        }
 	}
 	
 	public void mouseClicked(MouseEvent e)
    {
    }
    
 	public void mouseReleased(MouseEvent e)
    {
    }
    
 	public void mouseEntered(MouseEvent e)
    {
    }
    
	public void mouseExited(MouseEvent e)
    {
    }
    
   	public void SaveLog(int year,int month,int day)
   	{
     	
    }
 }