java記事本程序設(shè)計(jì)

1、import java.awt.*;import java.awt.event.*;import java.io.*;import javax.swing.*;public class MyNotebook public static void main(String args) new Notebook();/Notebook()主類： class Notebook extends JFrame Container container;JFileChooser fc=new JFileChooser(); File file=null; JMenuBar mb; JMenu fileMenu

2、,editMenu,helpMenu; JMenuItem newItem,openItem,saveItem,saveasItem,exitItem,cutItem,copyItem,pasteItem,sallItem,aboutItem; JTextArea jta; JPopupMenu popUpMenu; public Notebook() /記事本主界面設(shè)計(jì)程序/setTitle(記事本);container=this.getContentPane();container.setLayout(new BorderLayout();jta=new JTextArea();conta

3、iner.add(jta);setVisible(true);setSize(650, 450); mb=new JMenuBar(); setJMenuBar(mb); /文件菜單及其菜單選項(xiàng)的程序設(shè)計(jì)/fileMenu=new JMenu(文件);newItem=new JMenuItem(新建);/設(shè)置快捷鍵/newItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N ,ActionEvent.CTRL_MASK); /設(shè)置“新建”事件監(jiān)聽(tīng)/newItem.addActionListener(new NewActionListe

4、ner();fileMenu.add(newItem);fileMenu.addSeparator();openItem=new JMenuItem(打開(kāi));openItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O ,ActionEvent.CTRL_MASK);openItem.addActionListener(new OpenActionListener();fileMenu.add(openItem);fileMenu.addSeparator(); saveItem=new JMenuItem(保存);saveItem.

5、setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S ,ActionEvent.CTRL_MASK);saveItem.addActionListener(new SaveActionListener();fileMenu.add(saveItem);fileMenu.addSeparator();saveasItem=new JMenuItem(另存為);saveasItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A ,ActionEvent.CTRL_MASK);saveasIt

6、em.addActionListener(new SaveActionListener();fileMenu.add(saveasItem);fileMenu.addSeparator();exitItem=new JMenuItem(退出);exitItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_E ,ActionEvent.CTRL_MASK);exitItem.addActionListener(new ExitActionListener();fileMenu.add(exitItem);mb.add(fileMenu);/

7、編輯菜單欄及其菜單選項(xiàng)程序設(shè)計(jì)/editMenu=new JMenu(編輯);cutItem=new JMenuItem(剪切);cutItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, ActionEvent.CTRL_MASK);cutItem.addActionListener(new CutActionListener();editMenu.add(cutItem);editMenu.addSeparator();copyItem=new JMenuItem(復(fù)制);copyItem.setAccelerator(KeyS

8、troke.getKeyStroke(KeyEvent.VK_C, ActionEvent.CTRL_MASK);copyItem.addActionListener(new CopyActionListener();editMenu.add(copyItem);editMenu.addSeparator(); pasteItem=new JMenuItem(粘貼);pasteItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, ActionEvent.CTRL_MASK);pasteItem.addActionListener(n

9、ew PasteActionListener();editMenu.add(pasteItem);editMenu.addSeparator();sallItem=new JMenuItem(全選);sallItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_M, ActionEvent.CTRL_MASK);sallItem.addActionListener(new SallActionListener();editMenu.add(sallItem);mb.add(editMenu);/幫助菜單欄及其菜單選項(xiàng)程序設(shè)計(jì)/helpMe

10、nu=new JMenu(幫助);aboutItem=new JMenuItem(關(guān)于記事本);aboutItem.addActionListener(new AbouthActionListener();helpMenu.add(aboutItem);mb.add(helpMenu);/編輯菜單的鼠標(biāo)監(jiān)聽(tīng)及其彈出菜單的功能設(shè)計(jì)/popUpMenu = editMenu.getPopupMenu();jta.addMouseListener( new MouseAdapter() public void mouseReleased(MouseEvent e) if(e.getButton()

11、= MouseEvent.BUTTON3) popUpMenu.show(editMenu, e.getX(), e.getY(); public void mouseClicked(MouseEvent e) if(e.getButton() = MouseEvent.BUTTON1) popUpMenu.setVisible(false); ); /“新建”功能的實(shí)現(xiàn)/class NewActionListener implements ActionListener public void actionPerformed(ActionEvent e) jta.setText(); file

12、=null; /“保存功能的實(shí)現(xiàn)”/class SaveActionListener implements ActionListenerpublic void actionPerformed(ActionEvent e) if(file!=null) fc.setSelectedFile(file); int returnVal=fc.showSaveDialog(Notebook.this); if(returnVal=JFileChooser.APPROVE_OPTION) file=fc.getSelectedFile(); saving(); void saving() try Fil

13、eWriter Writef=new FileWriter(file); Writef.write(jta.getText(); Writef.close(); catch(Exception e)e.printStackTrace(); /“打開(kāi)”功能的實(shí)現(xiàn)/class OpenActionListener implements ActionListenerpublic void actionPerformed(ActionEvent e) if(file !=null)fc.setSelectedFile(file); int returnVal=fc.showOpenDialog(Not

14、ebook.this); if(returnVal=JFileChooser.APPROVE_OPTION) file=fc.getSelectedFile(); unfold(); void unfold() try FileReader Readf=new FileReader(file); int len=(int)file.length(); char buffer=new charlen; Readf.read(buffer,0,len); Readf.close(); jta.setText(new String(buffer); catch(Exception e)e.print

15、StackTrace(); /“退出”功能的實(shí)現(xiàn)/class ExitActionListener implements ActionListenerpublic void actionPerformed(ActionEvent e) setVisible(false); dispose(); System.exit(0);/“剪切”功能的 實(shí)現(xiàn)/class CutActionListener implements ActionListenerpublic void actionPerformed(ActionEvent e) jta.cut();/“復(fù)制”功能的實(shí)現(xiàn)/class CopyAc

16、tionListener implements ActionListenerpublic void actionPerformed(ActionEvent e) jta.copy();/“粘貼”功能的實(shí)現(xiàn)/class PasteActionListener implements ActionListenerpublic void actionPerformed(ActionEvent e) jta.paste();/“全選”功能的實(shí)現(xiàn)/class SallActionListener implements ActionListenerpublic void actionPerformed(ActionEvent e) jta.setSelectionStart(0);jta.setSelectionEnd(jt