java简单记事本程序

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1、代码：importjava.awt.*;importjava.awt.event.*;importjava.awt.datatransfer.*;importjava.io.*;publicclassEditorextendsFrame{Stringfilename;TextAreatx;Clipboardclip=getToolkit().getSystemClipboard();Editor(){setLayout(newGridLayout(1,1));tx=newTextArea();add(tx);MenuBarmb=newMenuBar(

2、);MenuF=newMenu("file");MenuItemn=newMenuItem("New");MenuItemo=newMenuItem("Open");MenuItems=newMenuItem("Save");MenuIteme=newMenuItem("Exit");n.addActionListener(newNew());F.add(n);o.addActionListener(newOpen());F.add(o);s.addActionListener(newSave());F.add(s);e.addActionListe

3、ner(newExit());F.add(e);mb.add(F);MenuE=newMenu("Edit");MenuItemcut=newMenuItem("Cut");MenuItemcopy=newMenuItem("Copy");MenuItempaste=newMenuItem("Paste");cut.addActionListener(newCut());E.add(cut);copy.addActionListener(newCopy());E.add(copy);paste.addActionListener(newPaste()

4、);E.add(paste);mb.add(E);setMenuBar(mb);mylistenermylist=newmylistener();addWindowListener(mylist);}classmylistenerextendsWindowAdapter{publicvoidwindowClosing(WindowEvente){System.exit(0);}}classNewimplementsActionListener{publicvoidactionPerformed(ActionEvente){tx.setText("")

5、;setTitle(filename);}}classOpenimplementsActionListener{publicvoidactionPerformed(ActionEvente){FileDialogfd=newFileDialog(Editor.this,"selectFile",FileDialog.LOAD);fd.show();if(fd.getFile()!=null){filename=fd.getDirectory()+fd.getFile();setTitle(filename);ReadFile();}tx.reques

6、tFocus();}}classSaveimplementsActionListener{publicvoidactionPerformed(ActionEvente){FileDialogfd=newFileDialog(Editor.this,"SaveFile",FileDialog.SAVE);fd.show();if(fd.getFile()!=null){filename=fd.getDirectory()+fd.getFile();setTitle(filename);try{DataOutputStreamd=newDataOutpu

7、tStream(newFileOutputStream(filename));Stringline=tx.getText();BufferedReaderbr=newBufferedReader(newStringReader(line));while((line=br.readLine())!=null){d.writeBytes(line+"r");d.close();}}catch(Exceptionex){System.out.println("Filenotfound");}tx.requestFocus();}}}classExit

8、implementsActionListener{publicvoidactionPerformed(Act