用JAVA编写的备忘录

import java.awt.*;
import java.awt.event.*;
import java.awt.Color;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.*;
import java.util.*;
import java.util.Calendar;
import java.io.*;
import java.io.IOException;

public class calendar extends Jframe
implements ActionListenerMouseListener
{
    int yearmonthday;
    int yearafterquerymonthafterquery;
    int startday;
    String SwitchMonth;
    String key;
    int changeyearmessage;
    int changemonthmessage;
    int priormonthprioryear;
    boolean ischange=falseischange_priornext=false;
    private JPanel LeftPaneRightPane;
    
    private JLabel YearLabel;
    private JLabel MonthLabel;
    private JComboBox MonthCombobox;
    private JTextField ShowDays[]=new JTextField[42];
    private JTextField YearText;
    private JLabel Ask;
    private JLabel ShowDate;
    private JLabel Blank;
    private JLabel show;
    private  JLabel TopBartitle[]=new JLabel[7];
    private JButton ToToday;
    private JButton Query;
    private String week[]={“星期日““星期一““星期二““星期三““星期四““星期五““星期六“};
    
    private JLabel NorthMonthDayYear;
    private JTextArea CenterText;
    private JButton SouthSaveSouthDelete;
    private JButton PriorMonth;
    private JButton NextMonth;
    public calendar（int yearint monthint day）
    {
     settitle（“备忘录“）;
     //the layout about left of Jpane
     RightPane=new JPanel（）;
     JPanel rightCenter=new JPanel（）;
     JPanel rightNorth=new JPanel（）;
 
     RightPane.setLayout（new BorderLayout（））;
     RightPane.add（rightNorthBorderLayout.NORTH）;
     RightPane.add（rightCenterBorderLayout.CENTER）;
    
     RightPane.add（ToToday=new JButton（“Go to today“）BorderLayout.SOUTH）;
     ToToday.setBackground（Color.cyan）;
     ToToday.addActionListener（this）;
     RightPane.validate（）;
     
     
     rightNorth.setLayout（new GridLayout（310-2））;
     rightNorth.add（Ask=new JLabel（“请输入你要查询的日子“））;
     JPanel North=new JPanel（new FlowLayout（080））;
     rightNorth.add（North）;
     North.add（YearLabel=new JLabel（“年:“））;
     North.add（YearText=new JTextField（4））;
     YearText.setBackground（Color.getHSBColor（302050））;
     YearText.setForeground（Color.blue）;
     YearText.setFont（new Font（“TimesRoman“Font.BOLD17））;
     YearText.addActionListener（this）;
     YearText.setFocusable（true）;
     North.add（Blank=new JLabel（“月:“））;
     North.add（MonthCombobox=new JComboBox（））;
     //add month to monthcombobox
     for（int i=1;i<=12;i++）
     {
         MonthCombobox.addItem（new Integer（i））;
     }
     //Switch the month
     MonthCombobox.setForeground（Color.blue）;
     MonthCombobox.setFont（new Font（“TimesRoman“Font.BOLD12））;
     North.add（Query=new JButton（“查询“））;
     Query.setForeground（Color.blue）;
     Query.addActionListener（this）;
     JPanel North2=new JPanel（new FlowLayout（））;
     rightNorth.add（North2）;
     North2.add（PriorMonth=new