用JAVA编写的一个简单记事本程序.doc

用JAVA编写的一个简单记事本程序用JAVA编写的一个简单记事本程序2010-12-30 14：27/-Notepad-import java.awt.*；import java.awt.event.*；import javax.swing.*；import javax.swing.event.*；import .*；import java.util.*；import java.io.*；public class Notepad extends JFrame implements ActionListenerFile file=null；Color color=Color.black；JTextPane text=new JTextPane()；/the text area JDialog about=new JDialog(this)；/the dialog ofAboutJFileChooser filechooser=new JFileChooser()；/file choose GraphicsEnvironment getFont=GraphicsEnvironment.getLocalGraphicsEnvironment()；Font fonts=getFont.getAllFonts()；JColorChooser colorchooser=new JColorChooser()；/Menu item for carte/forFileprivate JMenuItem jminew,jmiopen,jmisave,jmisaveas；/forEditprivate JMenuItem jmicut,jmicopy,jmiplaster,jmiall；/forFormatprivate JMenuItem jmifont,jmicolor；/forToolprivate JMenuItem jminotepad,jmicalculator；/forHelpprivate JMenuItem jmiabout；/forExitprivate JMenuItem jmiexit；/-/-public static void main(String args)Notepad frame=new Notepad()；frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)；frame.pack()；/pack()：set the size of frame automatic frame.setVisible(true)；/Default Constructor public Notepad()setTitle(Notepad)；setLocation(100,50)；/create menu bar JMenuBar jmb=new JMenuBar()；/set menu bar to the frame setJMenuBar(jmb)；/add menuFileto menu bar JMenu filemenu=new JMenu(File)；filemenu.setMnemonic(F)；/set hotkey jmb.add(filemenu)；/add menuEditto menu bar JMenu editmenu=new JMenu(Edit)；editmenu.setMnemonic(E)；/set hotkey jmb.add(editmenu)；/add menuFormatto menu bar JMenu formatmenu=new JMenu(Format)；formatmenu.setMnemonic(T)；/set hotkey jmb.add(formatmenu)；/add menuToolto menu bar JMenu toolmenu=new JMenu(Tool)；toolmenu.setMnemonic(L)；jmb.add(toolmenu)；/add menuHelpto menu bar JMenu helpmenu=new JMenu(Help)；helpmenu.setMnemonic(H)；/set hotkey jmb.add(helpmenu)；/add menuExitto menu bar JMenu exitmenu=new JMenu(Exit)；exitmenu.setMnemonic(X)；jmb.add(exitmenu)；/add menu item with mnemonics to menuFilefilemenu.add(jminew=new JMenuItem(New,N)；jminew.setIcon(new ImageIcon(images/Handle.gif)；filemenu.add(jmiopen=new JMenuItem(Open,O)；jmiopen.setIcon(new ImageIcon(images/folderOpen.gif)；filemenu.add(jmisave=new JMenuItem(Save,S)；jmisave.setIcon(new ImageIcon(images/3.gif)；filemenu.addSeparator()；filemenu.add(jmisaveas=new JMenuItem(Save as)；jmisaveas.setIcon(new ImageIcon(images/7.gif)；/set keyboard accelerators jminew.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N,ActionEvent.CTRL_MASK)；jmiopen.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,ActionEvent.CTRL_MASK)；jmisave.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,ActionEvent.CTRL_MASK)；/add menu item with mnemonics to menuEditeditmenu.add(jmicut=new JMenuItem(Cut,X)；jmicut.setIcon(new ImageIcon(images/face1.gif)；editmenu.add(jmicopy=new JMenuItem(Copy,C)；jmicopy.setIcon(new ImageIcon(images/face2.gif)；editmenu.add(jmiplaster=new JMenuItem(Plaster,V)；jmiplaster.setIcon(new ImageIcon(images/face3.gif)；editmenu.addSeparator()；editmenu.add(jmiall=new JMenuItem(All)；jmiall.setIcon(new ImageIcon(images/face4.gif)；/set keyboard accelerators jmicut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,ActionEvent.CTRL_MASK)；jmicopy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,ActionEvent.CTRL_MASK)；jmiplaster.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,ActionEvent.CTRL_MASK)；jmiall.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,ActionEvent.CTRL_MASK)；/add menu item with mnemonics to menuFormatformatmenu.add(jmifont=new JMenuItem(Font)；jmifont.setIcon(new ImageIcon(images/face12.gif)；formatmenu.addSeparator()；formatmenu.add(jmicolor=new JMenuItem(Color)；jmicolor.setIcon(new ImageIcon(images/face13.gif)；/add menu item with mnemonics to menuFormattoolmenu.add(jminotepad=new JMenuItem(MS Notepad)；jminotepad.setIcon(new ImageIcon(images/face5.gif)；toolmenu.addSeparator()；toolmenu.add(jmicalculator=new JMenuItem(MS Calculator)；jmicalculator.setIcon(new ImageIcon(images/face11.gif)；/add menu item with mnemonics to menuHelphelpmenu.add(jmiabout=new JMenuItem(About)；jmiabout.setIcon(new ImageIcon(images/face10.gif)；/add menu item with mnemonics to menuExitexitmenu.add(jmiexit=new JMenuItem(Exit)；jmiexit.setIcon(new ImageIcon(images/face6.gif)；/add textpane to notepad/textpane initialize setFont(new Font(Times New Roman,Font.PLAIN,12)；JScrollPane scrollpane=new JScrollPane(text)；scrollpane.setPreferredSize(new Dimension(600,500)；getContentPane().add(scrollpane)；/set the name of control,set the listener jminew.addActionListener(this)；jmiopen.addActionListener(this)；jmisave.addActionListener(this)；jmisaveas.addActionListener(this)；jmicut.addActionListener(this)；jmicopy.addActionListener(this)；jmiplaster.addActionListener(this)；jmiall.addActionListener(this)；jmifont.addActionListener(this)；jmicolor.addActionListener(this)；jminotepad.addActionListener(this)；jmicalculator.addActionListener(this)；jmiabout.addActionListener(this)；jmiexit.addActionListener(this)；/affair dispose public void actionPerformed(ActionEvent e)/JMenuItem mi=(JMenuItem)e.getSource()；String name=e.getActionCommand()；/the methodological of jminew if(e.getSource()instanceof JMenuItem)/new if(New.equals(name)text.setText()；file=null；/open if(Open.equals(name)if(file！=null)filechooser.setSelectedFile(file)；int returnVal=filechooser.showOpenDialog(Notepad.this)；if(returnVal=JFileChooser.APPROVE_OPTION)file=filechooser.getSelectedFile()；/the operation foropentryFileReader fr=new FileReader(file)；int len=(int)file.length()；char buffer=new charlen；fr.read(buffer,0,len)；fr.close()；text.setText(new String(buffer)；catch(Exception e_open)e_open.printStackTrace()；/save if(Save.equals(name)if(file！=null)filechooser.setSelectedFile(file)；int returnVal=filechooser.showSaveDialog(Notepad.this)；if(returnVal=JFileChooser.APPROVE_OPTION)file=filechooser.getSelectedFile()；tryFileWriter fw=new FileWriter(file)；fw.write(text.getText()；fw.close()；catch(Exception e_save)e_save.printStackTrace()；/cut if(Cut.equals(name)text.cut()；/copy if(Copy.equals(name)text.copy()；/plaster if(Plaster.equals(name)text.paste()；/All if(All.equals(name)text.selectAll()；/font if(Font.equals(name)/color if(Color.equals(name)color=JColorChooser.showDialog(Notepad.this,color)；text.setForeground(color)；/ms notepad if(MS Notepad.equals(name)tryString command=notepad.exe；Process child=Runtime.getRuntime().exec(command)；catch(IOException ex)/ms calculator if(MS Calculator.equals(name)tryString command=calc.exe；Process child=Runtime.getRuntime().exec(command)；catch(IOException e