一个简单的java记事本程序

               

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.util.regex.Pattern;
import java.util.regex.Matcher;

import java.io.*;

 

 

public class diary extends JFrame{

 
  static String file="a.ou";
  JFrame f=new JFrame("日记本");
  Container p=f.getContentPane();
  Calendar c1=Calendar.getInstance();
  File iconDir = new File("心情表情");
  JOptionPane jop=new JOptionPane();
  File file1=null;
  final File[] iconFiles = iconDir.listFiles(new FileFilter() {
            public boolean accept(File file)
             {
              return file.getName().toLowerCase().endsWith(".gif");
                 }
                 });

  JLabel jlabel1=new JLabel("标 题"),         //建立标签
         jlabel2= new JLabel("日 期"),
         jlabel3=new JLabel("天 气"),
         jlabel4=new JLabel("心 情");
      
        
 
  JTextArea
     t4=new JTextArea(1,8),
     t3=new JTextArea(1,8),
     t2=new JTextArea(1,20),
     t1=new JTextArea(40,80);
   
  String[] description={       
      "阴天","晴天","下雨了","起风了",        //天气组合框
      "下雪了","有点热","有点冷"};
  JComboBox c=new JComboBox(); 
  final JComboBox comboBox = new JComboBox(iconFiles);
  JPanel
    pp=new JPanel(),
    pa=new JPanel(),
    ppanel=new JPanel();
  FileDialog fd;
  JButton                //建立按钮             
  
     save=new JButton("保存日记"),
     open=new JButton("查看日记"),
     newFile =new JButton("新建日记"),
     about=new JButton("关于"),
     search=new JButton("检索日记");
 
 
 
  JScrollPane jscrollpane=new JScrollPane(t1);//建立滚动条
  

  public diary(){           //把组件加入到面板中
        ppanel.add(newFile);
        ppanel.add(save);
        ppanel.add(open);
        ppanel.add(search);
        ppanel.add(about);
     
        pa.add(jlabel1);
        pa.add(t2);
        pa.add(jlabel3);
        pa.add(c);
        pa.add(jlabel4);
        pa.add(comboBox);
        pa.add(jlabel2);
        pa.add(t3);
 
        pp.add(t4);
        t3.append(c1.get(Calendar.YEAR)+
                 " 年 "+(c1.get(Calendar.MONTH)+1)+
                 " 月 " + c1.get(Calendar.DATE)+"日");
        t4.append(c1.get(Calendar.YEAR)+
                 "."+(c1.get(Calendar.MONTH)+1)+
                 "." + c1.get(Calendar.DATE));
        newFile.addActionListener(new ActionListener(){  //新建日记
            public void actionPerformed(ActionEvent e){
                    save.setEnabled(true);
                    t1.setText(" ");
                    t2.setText(" ");
                    t1.append(c.getSelectedItem()+"\r\n");                                   }
             });  
        open.addActionListener(new ActionListener(){    //查看日记
            public void actionPerformed(ActionEvent e){
                   
                    String s1=null;
                    s1=jop.showInputDialog("请输入你要查看的日期,如2013.6.1\n(默认一天只有一篇日记，只显示第一篇的查找结果)");
         
                 try
                     {
                      
                        
                         FileReader fr=new FileReader("diary.txt");
                         BufferedReader br=new BufferedReader(fr);                                Pattern keyword1=Pattern.compile("[0-9]{4} \\.\\d{1,2}\\.\\d{1,1}");
                   
                        String s3;
                        String s4="******";//日记之间的分隔符
                         int x=0;
                         t1.setText(" ");
                         t2.setText(" ");
                         t1.setVisible(true);
                       
                         while((s3=br.readLine())!=null){                                               
                                Matcher matcher1=keyword1.matcher(s3);
                              
                                   if(s3.equalsIgnoreCase(s1)||x==1){
                                  
                                     if(s3.equalsIgnoreCase(s4))
                                        break; 
                                     x=1;
                                  
                                     t1.append(s3+"\r\n");
                                     save.setEnabled(false);
                                   
                                      }
   
                                 }
                             if(x==0)
                              jop.showMessageDialog(f,"你查找的日期不存在，\n请重新点击'打开日记'，再次输入！");
                            fr.close();
                            br.close();
                             }catch (IOException ioe){}
                         
        
         
               }
             });
      save.addActionListener(new ActionListener(){     //保存日记
            public void actionPerformed(ActionEvent e){
           
                try{
                 FileWriter fw=new FileWriter("diary.txt",true);
                 fw.append("****"+"\r\n");
                 fw.append(t4.getText()+"\r\n");
               
                 fw.append("标 题:"+t2.getText()+"\r\n");

                 fw.append(t1.getText()+"\r\n"+"******"+"\r\n");

                 fw.close();
                 save.setEnabled(false);
                }
                catch (IOException ioe){ }
   
                }
               });
           about.addActionListener(new ActionListener(){  //关于日记本
            public void actionPerformed(ActionEvent e){
              t1.setText(" ");
              t2.setText(" ");
              save.setEnabled(false);
              jop.showMessageDialog(f,"感谢你使用小飞日记本\n制作人:张小飞.\n联系电话:1 8 8 8 8 9 9 9 9 8 8\n邮箱：1 1 1 1 1 1 1 1 1 @ 168.com\n版权所有，免费使用.\n若有建议或不满，欢迎致电或发送邮件.\n你的支持与建议一直是我不懈的动力!");
 
                            }
                        });
             search.addActionListener(new ActionListener(){  //检索日记
            public void actionPerformed(ActionEvent e){ 
             String s2=null;                              s2=jop.showInputDialog("请输入你要检索的天气\n（该功能只对该天气进行累加，只对一下5种天气提供检索，晴天，阴天，下雨了，有点热，有点冷）\n如晴天");  try
                     {
                      
                        
                         FileReader ff=new FileReader("diary.txt");
                         BufferedReader bb=new BufferedReader(ff);       
                        String s5;
                     
                        int y=0;
 
                         while((s5=bb.readLine())!=null){                  
                                   if(s2.equalsIgnoreCase(s5))
                                         y++;
                                           }
                         jop.showMessageDialog(f,s2+"数为:"+y);
                         ff.close();
                         bb.close();
                             }catch (IOException ioe){}
                                  
            /*  while(s2==null)
                s2=jop.showInputDialog("请再次准确输入，4种天气，晴天，阴天，下雨了，有点热");
              String message=String.format("%s", s2);
              jop.showMessageDialog(f,message);*/
             
             
             }
          });

         for(int i=0;i<7;i++)
           c.addItem(description[i]);
         c.addActionListener(new ActionListener() {    //天气组合框操作
            public void actionPerformed(ActionEvent e) {
              
                 ((JComboBox)e.getSource()).getSelectedItem();
                
                    }
               });               
        f.add(jscrollpane);                 //添加滚动条
       
        p.add(ppanel,BorderLayout.SOUTH);      //设置布局
        p.add(pa,BorderLayout.SOUTH);
      
        t1.setLineWrap(true);         //自动换行
        jop.showMessageDialog(f,"注意：在选好天气后，在点击新建日记，\n当窗口中有你选择的天气时，说明天气选择成功。");              
     
     
   
      final Map<File, ImageIcon> fileIconMap = new HashMap<File,            ImageIcon>();                                 //添加心情图标框

     comboBox.setRenderer(new DefaultListCellRenderer() {
             public Component getListCellRendererComponent(JList list,              Object value, int index, boolean isSelected,  boolean               cellHasFocus)
       {
        ImageIcon oldIcon = (ImageIcon)getIcon();
        if (oldIcon != null) {
            oldIcon.setImageObserver(null);
            }

     File iconFile = (File) value;
     ImageIcon newIcon = fileIconMap.get(iconFile);
     if (newIcon == null) {
       newIcon = new ImageIcon(iconFile.getPath());
       fileIconMap.put(iconFile, newIcon);
    }

     if (newIcon != null) {
    if (index == -1) {
    newIcon.setImageObserver(comboBox);
      }
    else {
      newIcon.setImageObserver(list);
     }
       }

    String text = iconFile.getName();

    super.getListCellRendererComponent(
      list, text, index, isSelected, cellHasFocus);
       setIcon(newIcon);

    return this;
      }
      });                //心情图标到此结束
       
        f.setSize(800,600);
        f.setVisible(true);
            
        f.pack();            //自动调节尺寸
        f. setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//退出
          }
 
 
   public static void main(String[] args)
 {
     diary mm=new diary();
     }
  }     
   
     
   关键代码已加红

ps：可能有点大，没办法，加了些功能，也是全部代码