Java 记事本设计完整代码

功能界面展示：记事本完整代码：importjava.awt.*;importjava.awt.event.*;importjavax.swing.*;importjavax.swing.event.CaretEvent;importjavax.swing.event.CaretListener;importjava.io.*;@SuppressWarnings("serial")classmynotepadextendsJFrame{ Filefile=null; JTextAreacontent=newJTextArea(); JFileChooseropenfile=newJFileChooser(); JColorChooseropencolor=newJColorChooser(); JDialogabout=newJDialog(this); JMenuBarmenu=newJMenuBar(); JFramep=newJFrame(); booleanWordWrap=false; booleanstatus=false; mynotepad(){ initTextContent(); initMenu(); } voidinitTextContent(){ JScrollPanescroll=newJScrollPane(content); getContentPane().add(scroll); this.getContentPane().add(scroll,BorderLayout.CENTER); } JMenu[]menus=newJMenu[]{newJMenu("文件(F)"),newJMenu("编辑(E)"), newJMenu("格式(O)"),newJMenu("查找(V)"),newJMenu("帮助(H)")}; JMenuItemoptionofmenu[][]=newJMenuItem[][]{ {newJMenuItem("新建"),newJMenuItem("打开"),newJMenuItem("保存

"), newJMenuItem("退出")}, {newJMenuItem("复制"),newJMenuItem("剪切"),newJMenuItem("粘

贴"), newJMenuItem("全选"),newJMenuItem("查找"),new

JMenuItem("替换")}, {newJCheckBoxMenuItem("自动换行(W)"),newJMenuItem("字体(F)")}, {newJMenuItem("状态栏(S)")}, {newJMenuItem("帮助")}}; JLabeljs=newJLabel(); voidinitMenu(){ for(inti=0;i<menus.length;i++){ menu.add(menus[i]); for(intj=0;j<optionofmenu[i].length;j++){ menus[i].add(optionofmenu[i][j]); optionofmenu[i][j].addActionListener(action); } } menu.add(js); menus[0].setMnemonic(KeyEvent.VK_F); menus[1].setMnemonic(KeyEvent.VK_E); menus[2].setMnemonic(KeyEvent.VK_O); menus[3].setMnemonic(KeyEvent.VK_V); menus[4].setMnemonic(KeyEvent.VK_H); optionofmenu[2][0].setMnemonic(KeyEvent.VK_W); optionofmenu[2][1].setMnemonic(KeyEvent.VK_F); optionofmenu[3][0].setMnemonic(KeyEvent.VK_S); optionofmenu[1][4].addActionListener(newActionListener(){ publicvoidactionPerformed(ActionEvente){ finalJDialogdialog=newJDialog(about,"查找字符串...",

true); dialog.setBounds(560,250,310,130); JLabelfind=newJLabel("请输入字符串:"); finalJTextFieldfindtext=newJTextField(1); JButtonjbu=newJButton("查找"); dialog.setLayout(null); find.setBounds(10,30,90,20); findtext.setBounds(100,30,90,20); jbu.setBounds(200,30,80,20); dialog.add(find); dialog.add(findtext); dialog.add(jbu); jbu.addActionListener(newActionListener(){ publicvoidactionPerformed(ActionEvente){ Stringtext=content.getText(); Stringstr=findtext.getText(); intend=text.length(); intlen=str.length(); intstart=content.getSelectionEnd(); if(start==end){ start=0; } for(;start<=end-len;start++){ if(text.substring(start,start+

len).equals(str)){ content.setSelectionStart

(start); content.setSelectionEnd

(start+len); return; } } //若找不到待查字符串，则将光标置于末尾 content.setSelectionStart(end); content.setSelectionEnd(end); } }); dialog.addWindowListener(newWindowAdapter(){ publicvoidwindowClosing(WindowEvente){ dialog.dispose(); } }); dialog.setResizable(false); dialog.setVisible(true); } }); optionofmenu[1][5].addActionListener(newActionListener(){ publicvoidactionPerformed(ActionEvente){ finalJDialogdialog=newJDialog(about,"字符串替换...",

true); dialog.setBounds(560,250,310,180); finalJLabeltihuan=newJLabel("请输入要替换的字符串

："); finalJLabelmubiao=newJLabel("请输入替换后的字符串

："); finalJTextFieldjtf1=newJTextField(10); finalJTextFieldjtf2=newJTextField(10); JButtonjb=newJButton("替换"); dialog.setLayout(null); tihuan.setBounds(10,30,150,20); mubiao.setBounds(10,70,150,20); jtf1.setBounds(160,30,110,20); jtf2.setBounds(160,70,110,20); jb.setBounds(100,110,80,20); dialog.add(tihuan); dialog.add(mubiao); dialog.add(jtf1); dialog.add(jtf2); dialog.add(jb); jb.addActionListener(newActionListener(){ publicvoidactionPerformed(ActionEvente){ if(content.getText().contains

(jtf1.getText())) content.setText(content.getText

().replaceFirst( jtf1.getText(),

jtf2.getText())); else{ JOptionPane.showConfirmDialog(null, "没找到"+

jtf1.getText()); } } }); dialog.setResizable(false); dialog.setVisible(true); } }); JToolBarjb=newJToolBar(); jb.setBackground(newColor(236,233,216)); JLabeljl1=newJLabel(String.format("字符总长:0总行数：0")); jl1.setFont(newFont("宋体",0,12)); jb.add(jl1); JSeparators=newJSeparator(); s.setOrientation(SwingConstants.VERTICAL); jb.add(s); JLabeljl2=newJLabel(String.format("当前行：0当前列：0")); jl2.setFont(newFont("宋体",0,12)); jb.add(jl2); jb.setFloatable(false); jb.setVisible(status); this.getContentPane().add(jb,BorderLayout.SOUTH); content.addCaretListener(newCaretListener(){ @Override publicvoidcaretUpdate(CaretEvente){ //TODOAuto-generatedmethodstub JTextAreaeditArea=(JTextArea)e.getSource();intlinenum=1;intcolumnnum=1;try{intcaretpos=editArea.getCaretPosition();linenum=editArea.getLineOfOffset(caretpos);columnnum=caretpos-editArea.getLineStartOffset(linenum);linenum+=1;}catch(Exceptionex){}jl1.setText(String.format("字符总长:%d总行数：%d",editArea.getText

().length(),editArea.getLineCount()));jl2.setText(String.format("当前行：%d当前列：%d",linenum,columnnum)); }}); optionofmenu[3][0].addActionListener(newActionListener(){publicvoidactionPerformed(ActionEvente){ status=!status; if(status){ jb.setVisible(status); } else{ jb.setVisible(status); }} }); this.setJMenuBar(menu); } ActionListeneraction=newActionListener(){ @SuppressWarnings("unused") publicvoidactionPerformed(ActionEvente){ Stringname=e.getActionCommand(); JMenuItemMI=(JMenuItem)e.getSource(); if("新建".equals(name)){ content.setText(""); file=null; }elseif("打开".equals(name)){ if(file!=null) openfile.setSelectedFile(file); intreturnVal=openfile.showOpenDialog(mynotepad.this); if(returnVal==JFileChooser.APPROVE_OPTION){ file=openfile.getSelectedFile(); unfold(); } }elseif("保存".equals(name)){ if(file!=null) openfile.setSelectedFile(file); intreturnVal=openfile.showSaveDialog(mynotepad.this); if(returnVal==JFileChooser.APPROVE_OPTION){ file=openfile.getSelectedFile(); saving(); } }elseif("退出".equals(name)){ mynotepadf=newmynotepad(); ints=JOptionPane.showConfirmDialog(f,"退出？","退出", JOptionPane.YES_NO_OPTION); if(s==JOptionPane.YES_OPTION) System.exit(0); }elseif("剪切".equals(name)){ content.cut(); }elseif("复制".equals(name)){ content.copy(); }elseif("粘贴".equals(name)){ content.paste(); }elseif(e.getActionCommand().equals("全选")){ content.selectAll(); }elseif(e.getActionCommand().equals("自动换行(W)")){ WordWrap=!(WordWrap); content.setLineWrap(WordWrap); }elseif(e.getActionComm