1、import java.awt.event.*;import java.awt.*;import java.io.*;import java.lang.String;class jsb implements ActionListenerDialog bb;String strt;int i;FileDialog fd;File file;public Frame f;public TextArea p1 ;public MenuBar menubar;public Menu menu1 ,menu2 ,menu3 ;public MenuItem item1 ,item2 ,item3 ,it
2、em4 ,item5 ,item6 ,item7 ,item8 ,item9 ,item1 0 ;jsb(String s) i=0 ;f=new Frame(s);p1 =new TextArea(“);f.setSize(5 0 0 ,5 0 0 );f.setBackground(Color.white);f.setVisible(true);menubar=new MenuBar();menu1 =new Menu(“文件“);menu2 =new Menu(“编辑“);menu3 =new Menu(“帮助“);item1 =new MenuItem(“新建“);item2 =new
3、 MenuItem(“打开“);item3 =new MenuItem(“保存“);item4 =new MenuItem(“另存为“);item5 =new MenuItem(“退出“);item6 =new MenuItem(“全选“);item7 =new MenuItem(“复制“);item8 =new MenuItem(“剪切“);item9 =new MenuItem(“粘贴“);item1 0 =new MenuItem(“关于“);f.addWindowListener(new WindowAdapter()public void windowClosing(WindowEv
4、ent e)f.setVisible(false);System.exit(0 ););menu1 .add(item1 );menu1 .add(item2 );menu1 .add(item3 );menu1 .add(item4 );menu1 .add(item5 );menu2 .add(item6 );menu2 .add(item7 );menu2 .add(item8 );menu2 .add(item9 );menu3 .add(item1 0 );menubar.add(menu1 );menubar.add(menu2 );menubar.add(menu3 );f.se
5、tMenuBar(menubar);item1 .addActionListener(this);item2 .addActionListener(this);item3 .addActionListener(this);item4 .addActionListener(this);item5 .addActionListener(this);item6 .addActionListener(this);item7 .addActionListener(this);item8 .addActionListener(this);item9 .addActionListener(this);ite
6、m1 0 .addActionListener(this);f.setLayout(new GridLayout(1 ,1 );f.add(p1 );f.pack();public void actionPerformed(ActionEvent e)String ss;ss=p1 .getText().trim();if (e.getSource()=item5 )if (i=0 elseSystem.exit(0 );if (e.getSource()=item1 )if (i=0 elsep1 .setText(“);i=0 ;f.setTitle(“文件对话框“);if (e.getS
7、ource()=item2 )fd=new FileDialog(f,“打开文件“,0 );fd.setVisible(true);tryfile=new File(fd.getDirectory(),fd.getFile();f.setTitle(fd.getFile()+“文件对话框“);FileReader fr=new FileReader(file);BufferedReader br=new BufferedReader(fr);String line = null;String view = “;while(line=br.readLine()!=null)view += lin
8、e+“n“;p1 .setText(view);br.close();fr.close();catch(IOException expIn)if (e.getSource()=item3 )if (i=0 )bc();elsetryfile=new File(fd.getDirectory(),fd.getFile();f.setTitle(fd.getFile()+“-记事本“);FileWriter fw=new FileWriter(file);BufferedWriter bw=new BufferedWriter(fw);String s =p1 .getText();s = s.r
9、eplaceAll(“n“,“rn“);bw.write(s);bw.flush();bw.close();fw.close();i=1 ;catch(IOException expOut)i=0 ;if (e.getSource()=item4 )bc();if (e.getSource()=item1 0 )bb=new Dialog(f,“关于“);Label l1 =new Label(“本记事本的完成感谢老师和同学的帮助！“);bb.add(l1 );bb.setSize(2 5 0 ,1 5 0 );bb.setBackground(Color.white);bb.show();b
10、b.addWindowListener(new WindowAdapter()public void windowClosing(WindowEvent e)bb.setVisible(false);bb.dispose(););if (e.getSource()=item6 )p1 .setSelectionStart(0 );p1 .setSelectionEnd(p1 .getText().length();if (e.getSource()=item7 )tryString str=p1 .getSelectedText();if(str.length()!=0 )strt=str;c
11、atch(Exception ex)if (e.getSource()=item8 )tryString str=p1 .getSelectedText();if(str.length()!=0 )p1 .replaceRange(“,p1 .getSelectionStart(),p1 .getSelectionEnd();catch(Exception ex)if (e.getSource()=item9 )if(strt.length()0 )p1 .insert(strt,p1 .getCaretPosition();public void bc()fd=new FileDialog(
12、f,“保存文件“,1 );fd.setVisible(true);tryfile=new File(fd.getDirectory(),fd.getFile();f.setTitle(fd.getFile()+“-记事本“);FileWriter fw=new FileWriter(file);BufferedWriter bw=new BufferedWriter(fw);String s =p1 .getText();s = s.replaceAll(“n“,“rn“);bw.write(s);bw.flush();bw.close();fw.close();i=1 ;catch(IOException expOut)public class EX0 1 0 1 public static void main(String args)jsb dd=new jsb(“我的记事本“);
