notepad.java

我用java做的记事本,不要太好啊!

package notepad;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Date;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPopupMenu;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.filechooser.FileFilter;
import sun.security.krb5.internal.n;
import sun.util.calendar.CalendarDate;
import sun.util.calendar.Gregorian;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.GraphicsEnvironment;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.SystemColor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.border.Border;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
public class NotePad
{    
       public static void main(String[] args)
    {
        MyFrame frame = new MyFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.show();        
    }
    
}
class MyFrame extends JFrame
{
    private JMenuBar bar;
    
    private JMenu file;
    private JMenuItem create;
    private JMenuItem open;
    private JMenuItem save;
    private JMenuItem exit;
    
    private JMenu edit;
    private JMenuItem copy;
    private JMenuItem paste;
    private JMenuItem cut;
    private JMenuItem statistic;
    private JMenuItem selectAll;
    private JMenuItem timeanddate;                   
    
    private JMenu form;
    private JCheckBoxMenuItem line;
    private JCheckBoxMenuItem editable;
    private JMenuItem fontChoose;
    
    private JMenu help;
    private JMenuItem helponline;
    private JMenuItem about;
    
    private JTextArea text;
    private FileFilter filter;
    
    private JPopupMenu popup;
    private JMenuItem copyC;
    private JMenuItem pasteC;
    private JMenuItem cutC;
    private JMenuItem selectAllC;
    
    private Font font;
    
    public MyFrame()
    {
        setTitle("记事本");
        setSize(600,400);
         filter = new FileFilter()
                {
                    public boolean accept(File f)
                    {
                        return f.getName().toLowerCase().endsWith(".txt")
                                ||f.isDirectory();
                    }
                    public  String getDescription()
                    {
                        return "Text File";
                    }
                };
        
        bar = new JMenuBar();       
        
       
        file = new JMenu("文件(F)");
        file.setMnemonic('F');
        create = new JMenuItem("新建");
        create.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,InputEvent.CTRL_MASK));
        create.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {               
                text.setText("");
                setTitle("记事本");
            }
        });
        file.add(create);
        open = new JMenuItem("打开");
        open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MASK));
        
        exit = new JMenuItem("退出");
        exit.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.ALT_MASK));
        exit.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                System.exit(0);
            }
        });
        open.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                JFileChooser ch = new JFileChooser();
                ch.setCurrentDirectory(new File("C:\\"));
                ch.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
                ch.setFileFilter(filter);
                
                int result = ch.showOpenDialog(null);
                String path;
                if ( result == JFileChooser.APPROVE_OPTION)
                {
                    path = ch.getSelectedFile().getPath();  
                    try
                    {
                        FileInputStream inputFile = new FileInputStream(path);
                        byte[] data = new byte[inputFile.available()];
                        inputFile.read(data);
                        text.setText(new String(data));
                        setTitle( path + "-" + "记事本" );
                        inputFile.close();
                    }
                    catch(IOException ee)
                    {}
                }
               
                    
            }
        });
        save = new JMenuItem("保存");
        save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK));
        save.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                JFileChooser ch = new JFileChooser();
                ch.setCurrentDirectory(new File("C:\\"));
                ch.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
                ch.setFileFilter(filter);
                
                int result = ch.showOpenDialog(null);
                String path;
                if ( result == JFileChooser.APPROVE_OPTION)
                {
                    path = ch.getSelectedFile().getPath();  
                    try
                    {
                        FileOutputStream outputFile = new FileOutputStream(path);
                        String s = text.getText();
                        byte[] data = s.getBytes();
                        outputFile.write(data); 
                        outputFile.close();
                    }
                    catch(IOException ee)
                    {}
                    
                }
               
                    
            }
        });
        
        file.add(open);
        file.add(save);
        file.addSeparator();
        file.add(exit);
        
        bar.add(file);
             
        edit = new JMenu("编辑(E)");
        edit.setMnemonic('E');
        cut = new JMenuItem("剪切");        
        cut.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                text.cut();             
                                             
                             
            }
        });
        cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_MASK));
        copy = new JMenuItem("复制");        
        copy.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                text.copy();
            }
        });
        
        copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_MASK));
        paste = new JMenuItem("粘贴"); 
        paste.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                text.paste();
            }
        });
        paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_MASK));
        selectAll = new JMenuItem("全选");
        selectAll.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                text.selectAll();
                
            }
        });
        selectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,InputEvent.CTRL_MASK));
        statistic = new JMenuItem("字数统计");
        statistic.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                try
                 {
                     String temp = text.getSelectedText();
                     temp = temp.trim();
                     JTextArea t = new JTextArea(temp);                    
                     JOptionPane.showMessageDialog(null,"    您选择了"+t.getLineCount()+"行"+temp.length()+"个字");
                }
                catch(Exception ex)
                {
                    JOptionPane.showMessageDialog(null,"    请选择文本，否则无法统计");
                }
            }
        });
        
        timeanddate = new JMenuItem("时间/日期");
        timeanddate.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
               
                
                Date date = new Date();                
                //Gregorian calendar = new Gregorian();
                //CalendarDate calendarDate = calendar.getCalendarDate(date.getTime());             
                                           
                int minute = date.getMinutes();
                int hour = date.getHours();
                int year = date.getYear()+1900;
                int month = date.getMonth()+1;
                int day = date.getDate();  
                String printDate = hour+":"+minute+" "+year+"-"+month+"-"+day;
                text.append(printDate);                
            }
        });
      
        
        edit.add(cut);