java实现Windows记事本

import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;    //导入菜单
import javax.swing.filechooser.FileNameExtensionFilter;
import java.util.Date;    //获取系统的时间
import java.text.SimpleDateFormat;    //控制系统的时间格式

import java.awt.event.*;
import java.io.*;
import java.util.regex.*;

public class JF_Notpad extends JFrame implements ActionListener,WindowListener{
    //menuBar
    private    JMenuBar mb;
    private JMenu file,edit,format,view,help;
    
    //menuToolBar
    private JToolBar tool;
    private    static int BUTTONWIDTH,BUTTONHEIGHT;
    private JButton create,unfold,copy,cut,paste,pasteShortcut,delete;
    
    
    //File
    //JMenu下还可以有二级菜单
    private JMenu newNot;
    //JMenuItem不可以有其他菜单
    private JMenuItem notpad,model,open,save,saveAs,pageSet,print,exit;
    
    //Edit
    private JMenuItem undoE,cutE,copyE,pasteE,deleteE,findE,findNextE,replaceE,goToE,selectAllE,timeDateE;
    
    //Format
    private JMenuItem     wordWrap,font;
    
    //View
    private JMenuItem     statusBar;
    
    //Help
    private JMenuItem     viewHelp,about;
    
    //leftSpace
    private JPanel leftSpace;
    
    //TextArea
    private JTextArea content;
    private JScrollPane scroll;
    
    //openUrl,saveUrl
    private static String openUrl="E:/notpad.txt";    //保存之前打开文件的路径
    private static String saveUrl="E:/notpad.txt";    //保存之前保存文件的路径
    private boolean saved=false;    //判断文件是否保存过
    
    //contentFont 字体
    private Font contentFont;
    
    
    //是否在打开保存面板后，还应该打开选择文件面板
    private boolean openFileBool=false;
    
    public static void main(String[] args) {
        JF_Notpad not=new JF_Notpad();
    }
    
    public static JButton changeIconSize(JButton button,String url,int width,int height,String tip){
        button.setBounds(0,0,width,height);
        ImageIcon buttonImg=new ImageIcon(url);
        //改变图片的大小
        Image temp=buttonImg.getImage().getScaledInstance(button.getWidth(), button.getHeight(), buttonImg.getImage().SCALE_DEFAULT);
        button=new JButton(new ImageIcon(temp));
        button.setToolTipText(tip);    //提示
        
        return button;
    }
    
    public static Image changeImageSize(String url,int width,int height){
        ImageIcon Img=new ImageIcon(url);
        //改变图片的大小
        Image temp=Img.getImage().getScaledInstance(width, height, Img.getImage().SCALE_DEFAULT);
        
        return temp;
    }
    
    JF_Notpad(){
        //menubar
        mb=new JMenuBar();
        file=new JMenu("File(F)");
        file.setMnemonic('F');
        edit=new JMenu("Edit(E)");
        edit.setMnemonic('E');
        format=new JMenu("Format(O)");
        format.setMnemonic('O');
        view =new JMenu("View(V)");
        view.setMnemonic('V');
        help=new JMenu("Help(H)");
        help.setMnemonic('H');
        
        //menuToolBar
        tool=new JToolBar();
        BUTTONWIDTH=22;
        BUTTONHEIGHT=22;
        
        create=new JButton();
        create=JF_Notpad.changeIconSize(create, "img/notpad/news.png", BUTTONWIDTH, BUTTONWIDTH, "New");
        unfold=new JButton();
        unfold=JF_Notpad.changeIconSize(unfold, "img/notpad/open.png", BUTTONWIDTH, BUTTONWIDTH, "Open");
        copy=new JButton();
        copy=JF_Notpad.changeIconSize(copy, "img/notpad/copy.png", BUTTONWIDTH, BUTTONWIDTH, "Copy");
        cut=new JButton();
        cut=JF_Notpad.changeIconSize(cut, "img/notpad/cut.png", BUTTONWIDTH, BUTTONWIDTH, "Cut");
        paste=new JButton();
        paste=JF_Notpad.changeIconSize(unfold, "img/notpad/paste.png", BUTTONWIDTH, BUTTONWIDTH, "Paste");
        pasteShortcut=new JButton();
        pasteShortcut=JF_Notpad.changeIconSize(pasteShortcut, "img/notpad/pasteShortcut.png", BUTTONWIDTH, BUTTONWIDTH, "PasteShortcut");
        delete=new JButton();
        delete=JF_Notpad.changeIconSize(delete, "img/notpad/delete.png", BUTTONWIDTH, BUTTONWIDTH, "Delete");
        
        //menuToolBarListener
        create.setActionCommand("notpad");
        create.addActionListener(this);
        unfold.setActionCommand("open");
        unfold.addActionListener(this);
        copy.setActionCommand("copyE");
        copy.addActionListener(this);
        cut.setActionCommand("cutE");
        cut.addActionListener(this);
        paste.setActionCommand("pasteE");
        paste.addActionListener(this);
        pasteShortcut.setActionCommand("pasteShortcut");
        pasteShortcut.addActionListener(this);
        delete.setActionCommand("deleteE");
        delete.addActionListener(this);
        
        //file
        newNot=new JMenu("New(N)");
        newNot.setMnemonic('N');
        ImageIcon icon=new ImageIcon(this.changeImageSize("img/notpad/logo.png", BUTTONWIDTH-5,BUTTONHEIGHT-5 ));
        notpad=new JMenuItem("Notpad",icon);
        model=new JMenuItem("Model");
        icon=new ImageIcon(this.changeImageSize("img/notpad/open.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
        open=new JMenuItem("Open",icon);
        icon=new ImageIcon(this.changeImageSize("img/notpad/save.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
        save=new JMenuItem("Save",icon);
        icon=new ImageIcon(this.changeImageSize("img/notpad/saveAs.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
        saveAs=new JMenuItem("Save As...",icon);
        pageSet=new JMenuItem("PageSet");
        print=new JMenuItem("Print");
        icon=new ImageIcon(this.changeImageSize("img/notpad/exit.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
        exit=new JMenuItem("Exit",icon);
        
        //FileListener
        notpad.setActionCommand("notpad");
        notpad.addActionListener(this);
        model.setActionCommand("model");
        model.addActionListener(this);
        open.setActionCommand("open");
        open.addActionListener(this);
        save.setActionCommand("save");
        save.addActionListener(this);
        saveAs.setActionCommand("saveAs");
        saveAs.addActionListener(this);
        pageSet.setActionCommand("pageSet");
        pageSet.addActionListener(this);
        print.setActionCommand("print");
        print.addActionListener(this);
        exit.setActionCommand("exit");
        exit.addActionListener(this);
        
        //Edit    
        undoE=new JMenuItem("Undo");
        icon=new ImageIcon(this.changeImageSize("img/notpad/cut.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
        cutE=new JMenuItem("Cut",icon);
        icon=new ImageIcon(this.changeImageSize("img/notpad/copy.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
        copyE=new JMenuItem("Copy",icon);
        icon=new ImageIcon(this.changeImageSize("img/notpad/paste.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
        pasteE=new JMenuItem("Paste",icon);
        icon=new ImageIcon(this.changeImageSize("img/notpad/delete.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
        deleteE=new JMenuItem("Delete",icon);
        findE=new JMenuItem("Find...");
        findNextE=new JMenuItem("Find Next");
        replaceE=new JMenuItem("Replace...");
        goToE=new JMenuItem("Go To..");
        selectAllE=new JMenuItem("Select All");
        timeDateE=new JMenuItem("Time/Data");
        
        //EditListener
        undoE.setActionCommand("undoE");
        undoE.addActionListener(this);
        cutE.setActionCommand("cutE");
        cutE.addActionListener(this);
        copyE.setActionCommand("copyE");
        copyE.addActionListener(this);
        pasteE.setActionCommand("pasteE");
        pasteE.addActionListener(this);
        deleteE.setActionCommand("deleteE");
        deleteE.addActionListener(this);
        findE.setActionCommand("findE");
        findE.addActionListener(this);
        findNextE.setActionCommand("findNextE");
        findNextE.addActionListener(this);
        replaceE.setActionCommand("replaceE");
        replaceE.addActionListener(this);
        goToE.setActionCommand("goToE");
        goToE.addActionListener(this);
        selectAllE.setActionCommand("selectAllE");
        selectAllE.addActionListener(this);
        timeDateE.setActionCommand("timeDateE");
        timeDateE.addActionListener(this);
        
        //Format
        icon=new ImageIcon(this.changeImageSize("img/notpad/wordWrap.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
        wordWrap=new JMenuItem("Word Wrap",icon);
        icon=new ImageIcon(this.changeImageSize("img/notpad/font.png", BUTTONWIDTH-8, BUTTONHEIGHT-8));
        font=new JMenuItem("Font...",icon);
        
        //FormatListener
        wordWrap.setActionCommand("wordWrap");
        wordWrap.addActionListener(this);
        font.setActionCommand("font");
        font.addActionListener(this);
        
        //View
        statusBar=new JMenuItem("Status Bar");
        
        //ViewListener
        statusBar.setActionCommand("statusBar");
        statusBar.addActionListener(this);
        
        //Help
        viewHelp=new JMenuItem("View Help");
        icon=new ImageIcon(this.changeImageSize("img/notpad/about.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
        about=new JMenuItem("About NotePad",icon);
        
        //HelpListener
        viewHelp.setActionCommand("viewHelp");
        viewHelp.addActionListener(this);
        about.setActionCommand("about");
        about.addActionListener(this);
        
        //leftSpace
        leftSpace=new JPanel();
        
        //contentFont 
        contentFont=new Font("KaiTi",Font.PLAIN,20);
        
        //textArea
        content=new JTextArea();
        content.setFont(contentFont);
        scroll=new JScrollPane(content);
        //scroll.setHorizontalScrollBar(content);
        
        //openUrl,saveUrl
//        openUrl="E:/notpad.txt";
//        saveUrl="E:/notpad.txt";
//        saved=false;
        
        //saveFilePanel
//        Save saveF=new Save("Save",this);
        
        //添加组件，从下一级开始装
        newNot.add(notpad);    newNot.add(model);
        file.add(newNot);    file.add(open);    file.add(save);    file.add(saveAs);    file.addSeparator();    file.add(pageSet);    file.add(print);    file.addSeparator();    file.add(exit);
        
        edit.add(undoE);
        edit.addSeparator();
        edit.add(cutE);
        edit.add(copyE);
        edit.add(pasteE);
        edit.add(deleteE);
        edit.addSeparator();
        edit.add(findE);
        edit.add(findNextE);
        edit.add(replaceE);
        edit.add(goToE);
        edit.addSeparator();
        edit.add(selectAllE);
        edit.add(timeDateE);
        
        format.add(wordWrap);
        format.add(font);
        
        view.add(statusBar);
        
        help.add(viewHelp);
        help.addSeparator();
        help.add(about);
        

        mb.add(file);    mb.add(edit); mb.add(format);    mb.add(view);    mb.add(help);
        
        tool.add(create);    
        tool.add(unfold); 
        tool.add(copy);
        tool.add(cut);
        tool.add(paste);
        tool.add(pasteShortcut);
        tool.add(delete);
        
        this.setJMenuBar(mb);
        this.add(tool,BorderLayout.NORTH);
        this.add(leftSpace,BorderLayout.WEST);
        this.add(scroll);
        
        
        this.setTitle("Notpad");
        this.setIconImage(new ImageIcon("img/notpad/logo.png").getImage());
        this.setLocation(300,300);
        this.setSize(400,400);
        this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);
        this.setVisible(true);
        
    }
    
    private String origContent=null;    //保存一开始的文件或者保存过的文件
    private String copyContent=null;
    @Override
    public void actionPerformed(ActionEvent e) {
        switch(e.getActionCommand()){
        case "notpad":{
            System.out.println("notpad");
            
            this.isChangeFile("txt");
            
        }break;

        case "model":{
            System.out.println("model");
            
            this.isChangeFile("java");
        }break;

        case "open":{
            System.out.println("open");
            //防止第一次打开空文件时，还没保存
            if(this.origContent==null){
                this.saved=true;
            }
            
            if(saved){
                this.openFilePanel();
            }else{
                Save saveF=new Save("Save",this);
                this.openFilePanel();
            }
            
            
            
        }break;

        case "save":{
            System.out.println("save");
            this.saveFile();
            //this.setSaved(true);
            
        }break;

        case "saveAs":{
            System.out.println("saveAs");
            
            String str=content.getText();
            //选择保存文件的路径
            JFileChooser fileChoose=null;
            if(saveUrl==null){
                fileChoose=new JFileChooser();
            }else{
                fileChoose=new JFileChooser(saveUrl);
            }
            FileNameExtensionFilter filter=new FileNameExtensionFilter("txt & java","java","txt");    //设置可以识别的文件
            fileChoose.setFileFilter(filter);
            fileChoose.setDialogTitle("Save File");
            fileChoose.showSaveDialog(save);
            fileChoose.setVisible(true);
            
            File outFile =fileChoose.getSelectedFile();
            saveUrl=fileChoose.getSelectedFile().getPath();
            PrintStream p=null;
            try{
                p=new PrintStream(outFile);
                System.setOut(p);
                System.out.print(str);
            }catch(Exception a){
                System.out.println("SaveAS File Error!!");
            }finally{
                p.close();
            }    
        }break;

        case "pageSet":{
            System.out.println("pageSet");
            
        }break;

        case "print":{
            System.out.println("print");
            
        }break;

        case "exit":{
            System.out.println("exit");
            
            System.exit(-1);
        }break;

        case "undoE":{
            System.out.println("undoE");
            
        }break;

        case "cutE":{
            System.out.println("cutE");
            if(this.content.getSelectedText()!=null){
                this.copyContent=this.content.getSelectedText();
            }
            this.content.replaceSelection("");
        }break;

        case "copyE":{
            System.out.println("copyE");
            if(this.content.getSelectedText()!=null){
                this.copyContent=this.content.getSelectedText();
            }
            
        }break;

        case "pasteE":{
            System.out.println("pasteE");
            if(copyContent!=null){
                this.content.replaceRange("", content.getSelectionStart(), content.getSelectionEnd());
            }
            this.content.insert(copyContent, this.content.getSelectionStart());
        }break;

        case "deleteE":{
            System.out.println("deleteE");
            
            this.content.replaceSelection("");
        }break;

        case "findE":{
            System.out.println("findE");
            
            
        }break;

        case "findNextE":{
            System.out.println("findNextE");
            
        }break;

        case "replaceE":{
            System.out.println("replaceE");
            
        }break;

        case "goToE":{
            System.out.println("goToE");
            
        }break;

        case "selectAllE":{
            System.out.println("selectAllE");
            
            this.content.selectAll();
        }break;

        case "timeDateE":{
            System.out.println("timeDateE");
            
            SimpleDateFormat df=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            //System.out.println(df.format(new Date()));
            this.content.insert(df.format(new Date()), content.getSelectionStart());
        }break;

        case "wordWrap":{
            System.out.println("wordWrap");
            
            ImageIcon icon;
            if(this.content.getLineWrap()){
                this.content.setLineWrap(false);
                icon=new ImageIcon(this.changeImageSize("img/notpad/wordWrap.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
                this.wordWrap.setIcon(icon);
            }else{
                this.content.setLineWrap(true);
                icon=new ImageIcon(this.changeImageSize("img/notpad/wordWrapNo.png", BUTTONWIDTH-5, BUTTONHEIGHT-5));
                this.wordWrap.setIcon(icon);
            }
            
        }break;

        case "font":{
            System.out.println("font");
            
            FontPanel f=new FontPanel("Font",this);
            
//            this.content.setFont(new Font(f.getFontN(),f.getFontSytleN(),f.getSizeN()));
            
        }break;

        case "statusBar":{
            System.out.println("statusBar");
            
        }break;

        case "viewHelp":{
            System.out.println("viewHelp");
            
        }break;

        case "about":{
            System.out.println("about");
            
            About a=new About("About","1.0","feiquan","228332xxxxx@qq.com","xxx-xxxx-xxxx","https://www.baidu.com");
        }break;
        
        case "pasteShortcut":{
            System.out.println("pasteShortcut");
            
        }break;
        
        }
        
    }

    @Override
    public void windowOpened(WindowEvent e) {
        // TODO Auto-generated method stub
        
    }

    @Override
    public void windowClosing(WindowEvent e) {
        // TODO Auto-generated method stub
        System.out .println("弹出是否选择保存的对话框");
        if(saved){
            Save saveF=new Save("Save",this);
        }
    }

    @Override
    public void windowClosed(WindowEvent e) {
        // TODO Auto-generated method stub
        
    }

    @Override
    public void windowIconified(WindowEvent e) {
        // TODO Auto-generated method stub
        
    }

    @Override
    public void windowDeiconified(WindowEvent e) {
        // TODO Auto-generated method stub
        
    }

    @Override
    public void windowActivated(WindowEvent e) {
        // TODO Auto-generated method stub
        
    }

    @Override
    public void windowDeactivated(WindowEvent e) {
        // TODO Auto-generated method stub
        
    }

    public static String getOpenUrl() {
        return openUrl;
    }

    public static void setOpenUrl(String openUrl) {
        JF_Notpad.openUrl = openUrl;
    }

    public static String getSaveUrl() {
        return saveUrl;
    }

    public static void setSaveUrl(String saveUrl) {
        JF_Notpad.saveUrl = saveUrl;
    }
    
    //保存文件其中包含了，判断文件是否存在
    public void saveFile(){
        String str=this.content.getText();
        System.out.println("正在保存：\n"+str);
        
        //判断文件是否存在,不存在则创建文件
        File file=new File(openUrl);
        if(!file.exists()){
            try{
                file.createNewFile();
            }catch(Exception a){
                System.out.println("创建文件 "+file.getAbsolutePath()+" 失败！！");
            }
        }
        
        PrintStream p=null;
        try{
            p=new PrintStream(new File(openUrl));
            System.setOut(p);
            System.out.print(str);
            saved=true;
        }catch(Exception a){
            System.out.println("Save File Error!!");
            saved=false;
        }finally{
            p.close();
        }
        
    }
    
    //判断文件是否修改过，并根据传入的属性判断新建那个文件
    public void isChangeFile(String properties){
        System.out.println("是否保存文件："+saved);
        //判断文件是否修改过
        if(!(this.content.getText().equals(origContent))){
            saved=false;
        }
        
        //如果内容为空，也视为已经保存
        if(this.content.getText()==null||this.content.getText().equals(""))saved=true;
        
        System.out.println("判断后是否保存文件："+saved);
        if(saved){
            switch(properties){
            case "txt":{
                this.content.setText("");
                this.setTitle("notpad");
                origContent="";
            }break;
            case "java":{
                this.setTitle("notpad");
                String str="public class Notpad {\n\tpublic static void main (String[] ages) {\n\t\t\n\t}\n}";
                this.content.setText(str);
                
                origContent=str;
            }break; 
            }
            
        }else{
            System.out .println("弹出是否选择保存的对话框");
            Save saveF=new Save("Save",this);
            
        }
        System.out.println("经过保存面板后是否保存文件："+saved);
    }
    
    //打开选择打开文件面板，并选择文件
    public void openFilePanel(){
        origContent=this.content.getText();
        //显示选择文件面板
        JFileChooser fileChoose=null;
        if(openUrl==null){
            fileChoose=new JFileChooser();
        }else{
            fileChoose=new JFileChooser(openUrl);
        }
        FileNameExtensionFilter filter=new FileNameExtensionFilter("txt & java","java","txt");
        fileChoose.setFileFilter(filter);
        fileChoose.setDialogTitle("Open File");
        fileChoose.showOpenDialog(null);
        fileChoose.setVisible(true);
        
        //得到文件
        String url=fileChoose.getSelectedFile().getAbsolutePath();    //得到选择文件的路径
        
        
        //设置保存面板显示的路径
        JF_Notpad.setOpenUrl(url);
        Save saveF=new Save("Save",this);
        saveF.setVisible(false);
        saveF.setUrl(url);
        JLabel temp=saveF.getUrlL();
        temp.setText(url+" ?");
        saveF.setUrlL(temp);
        
        String name=fileChoose.getSelectedFile().getName();
        this.setTitle(name+" - Notpad");    //设置主窗口标题
        
        //文件流
        FileReader fRead=null;     BufferedReader buffRead=null;
        
        try{
            fRead=new FileReader(openUrl);
            buffRead=new BufferedReader(fRead);
            
            String str=""; String readLine="";
            readLine=buffRead.readLine();
            while(readLine!=null){
                str=str+readLine+"\r\n";
                readLine=buffRead.readLine();
            }
            
            content.setText(str);
            origContent=str;
        }catch(Exception a){
            System.out.println("Open file error!!");
        }finally{
            try{
                fRead.close();
                buffRead.close();
            }catch(Exception b){
                System.out.println("Open file stream error!!");
            }
        }
    }

    public boolean isSaved() {
        return saved;
    }

    public void setSaved(boolean saved) {
        this.saved = saved;
    }

    public boolean getOpenFileBool() {
        return openFileBool;
    }

    public void setOpenFileBool(boolean openFileBool) {
        this.openFileBool = openFileBool;
    }

    public String getOrigContent() {
        return origContent;
    }

    public void setOrigContent(String origContent) {
        this.origContent = origContent;
    }

    public JTextArea getContent() {
        return content;
    }

    public void setContent(JTextArea content) {
        this.content = content;
    }
}

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public class FontPanel extends JFrame implements ActionListener{
    private JList list1,list2,list3;
    private JScrollPane scroll1,scroll2,scroll3;
    private JLabel l1,l2,l3,l4,l5,l6,simpleL;
    private JButton ok,cancel,use;
    private JPanel p,scrollP,p2,space,space2,simple,mainP,bottomP;
    private  static String fontN="KaiTi";
    private static int fontSytleN=0,sizeN=20;
    private  JF_Notpad notpad ;
    
//    public static void main (String[] ages) {
//        FontPanel f=new FontPanel("Font");
//        
//    }
    
    FontPanel(String title,JF_Notpad notpad){
        
        this.notpad=notpad;
        
        String[] s={"Font","FontStyle","Size"};
        
        //获取系统字体
        String[] font=GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames();
        String style=" PLAIN,BOLD, ITALIC ";
        String[] fontStyle=style.split(",");
        String sizeStr="";
        for(int i=8;i<73;i++){
            sizeStr=sizeStr+i+",";
        }
        String[] size=sizeStr.split(",");
        int count=5;
        
        list1=new JList(font);
        list1.setVisibleRowCount(count);
        list2=new JList(fontStyle);
        list2.setVisibleRowCount(count);
        list3=new JList(size);
        list3.setVisibleRowCount(count);
        
        list1.setSelectedIndex(153);
        list2.setSelectedIndex(0);
        list3.setSelectedIndex(12);
        
        scroll1=new JScrollPane(list1);
        scroll2=new JScrollPane(list2);
        scroll3=new JScrollPane(list3);
        
        l1=new JLabel(s[0],JLabel.CENTER);
        l2=new JLabel(s[1],JLabel.CENTER);
        l3=new JLabel(s[2],JLabel.CENTER);
        l4=new JLabel(this.fontN,JLabel.CENTER);
        l5=new JLabel(fontStyle[this.fontSytleN],JLabel.CENTER);
        l6=new JLabel(String.valueOf(this.sizeN),JLabel.CENTER);
        
        
        ok=new JButton("OK");     cancel=new JButton("Cancel");
        ok.setActionCommand("OK");     ok.addActionListener(this);
        cancel.setActionCommand("Cancel");    cancel.addActionListener(this);
        
        p=new JPanel();
        p.setLayout(new GridLayout(2,3,10,10));
        
        p.add(l1);    p.add(l2);    p.add(l3);
        p.add(l4);    p.add(l5);    p.add(l6);
        
        scrollP=new JPanel(new GridLayout(1,3,10,10));
        
        scrollP.add(scroll1);    scrollP.add(scroll2);    scrollP.add(scroll3);
        
        simple=new JPanel();
        simple.setLayout(new FlowLayout(FlowLayout.LEFT));
        simpleL=new JLabel("AaBbYyZz");
        simpleL.setFont(new Font(FontPanel.fontN,FontPanel.fontSytleN,FontPanel.sizeN));
        
        use=new JButton("Simple");
        use.setActionCommand("Simple");
        use.addActionListener(this);
        
        simple.add(use);    simple.add(new JLabel("   "));    simple.add(simpleL);
        
        p2=new JPanel();
        p2.setLayout(new FlowLayout(FlowLayout.RIGHT));
        
        p2.add(ok);    p2.add(cancel);
        
        space=new JPanel();
        space2=new JPanel();
        
        bottomP=new JPanel(new GridLayout(2,1,10,10));
        bottomP.add(simple);    bottomP.add(p2);
        
        mainP =new JPanel(new GridLayout(3,1,10,10));
        
        mainP.add(p);    mainP.add(scrollP);     mainP.add(bottomP);
        
        this.add(mainP);
        this.add(p2,BorderLayout.SOUTH);    
        this.add(space,BorderLayout.WEST);
        this.add(space2,BorderLayout.EAST);
        
        this.setTitle(title);
        this.setIconImage(new ImageIcon("img/notpad/font.png").getImage());
        this.setLocation(300,300);
        this.setSize(500,640);
        this.setVisible(true);
        this.setResizable(false);
//        this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);
        
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        switch(e.getActionCommand()){
        case "OK":{
            this.setFontN(this.list1.getSelectedValue().toString());
            this.setFontSytleN(this.list2.getSelectedIndex());
            this.setSizeN(this.list3.getSelectedIndex()+8);
//            System.out.println(this.getFontN()+"\t"+this.getFontSytleN()+"\t"+this.getSizeN());
            this.setVisible(false);
            
            Font f=new Font(FontPanel.fontN,FontPanel.fontSytleN,FontPanel.sizeN);
            JTextArea t=notpad.getContent();
            t.setFont(f);
            notpad.setContent(t);
        }break;
        case "Cancel":{
            this.setVisible(false);
        }break;
        case "Simple":{
            this.simpleL.setFont(new Font(this.list1.getSelectedValue().toString(),this.list2.getSelectedIndex(),this.list3.getSelectedIndex()+8));
        }break;
        }
    }

    public static String getFontN() {
        return fontN;
    }

    public static void setFontN(String fontN) {
        FontPanel.fontN = fontN;
    }

    public static int getFontSytleN() {
        return fontSytleN;
    }

    public static void setFontSytleN(int fontSytleN) {
        FontPanel.fontSytleN = fontSytleN;
    }

    public static int getSizeN() {
        return sizeN;
    }

    public static void setSizeN(int sizeN) {
        FontPanel.sizeN = sizeN;
    }
}

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

public  class About extends JFrame implements ActionListener {
    private JLabel [] l={null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null};
    private JPanel p,p2;
    private JButton b;
    
    About(String title,String version,String copyrigth,String qqEmil,String relative,String href){
        String [] s={"","","Version:",version," "," ","@CopyRight：",copyrigth,"QQ邮箱：",qqEmil,"联系方式：",relative,"","<html><a href='"+href+"'>更多</a></html>>","",""};
        JPanel p=new JPanel();
        p.setLayout(new GridLayout((int)l.length/2,2));
        for(int i=0;i<l.length;i++){
            if(i%2==0){
                l[i]=new JLabel(s[i],JLabel.CENTER);
            }else{
                l[i]=new JLabel(s[i],JLabel.LEFT) ;
            }
            //设置手型
            if(i==13){
                l[i].setCursor(Cursor.getDefaultCursor().getPredefinedCursor(Cursor.HAND_CURSOR));
            }
            p.add(l[i]);
        }
        System.out.println(l.length);
        b=new JButton("OK");
        b.setActionCommand("OK");
        b.addActionListener(this);
        
        p2=new JPanel();
        p2.setLayout(new FlowLayout(FlowLayout.RIGHT));
        p2.add(b);
        p2.add(new JLabel("          "));
        
        this.add(p);
        this.add(p2,BorderLayout.SOUTH);
        this.setTitle(title);
        this.setIconImage(new ImageIcon("img/notpad/about.png").getImage());
        this.setLocation(300,300);
        this.setSize(350,300);
        this.setVisible(true);
        this.setResizable(false);
        //this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);
    }
    
    public void actionPerformed(ActionEvent e)
    {
        System.out.println(e);
    }
}

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Save extends JFrame implements ActionListener {
    private JLabel l,urlL;
    private JButton save,noSave,cancel;
    private String url;
    private JPanel bottomP,contentP;
    private Font font;
    private JF_Notpad notpad;
    
//    public static void main(String[] ages){
//        Save s=new Save("Save");
//    }
    
    Save(String title,JF_Notpad notpad){
        this.notpad=notpad;
        
        font=new Font("",Font.BOLD,14);
        
        url=notpad.getOpenUrl()+" ?";
        urlL=new JLabel(url,JLabel.CENTER);
        urlL.setFont(font);
        l=new JLabel("Do you want to save changes to ",JLabel.CENTER);
        l.setFont(font);
        
        contentP=new JPanel(new GridLayout(2,1));
        contentP.add(l);    contentP.add(urlL);
        
        save=new JButton("Save");
        noSave=new JButton("Don't Save");
        cancel=new JButton("Cancel");
        
        save.setActionCommand("Save");
        noSave.setActionCommand("noSave");
        cancel.setActionCommand("Cancel");
        
        save.addActionListener(this);
        noSave.addActionListener(this);
        cancel.addActionListener(this);
        
        bottomP=new JPanel(new FlowLayout(FlowLayout.RIGHT));
        
        bottomP.add(save);    bottomP.add(noSave);    bottomP.add(cancel);
        
        
        this.add(contentP);
        this.add(bottomP,BorderLayout.SOUTH);
        
        this.setTitle(title);
        this.setLocation(300,300);
        this.setSize(400,170);
        this.setResizable(false);
//        this.setDefaultCloseOperation(this.EXIT_ON_CLOSE);
        this.setVisible(true);
        
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        switch(e.getActionCommand()){
        case "Save":{
            notpad.saveFile();
            notpad.setSaved(true);
            notpad.setOrigContent(notpad.getContent().getText());
            this.setVisible(false);

        }break;
        case "noSave":{
            notpad.setOrigContent(notpad.getContent().getText());
            notpad.setSaved(true);
            this.setVisible(false);
        }break;
        case "Cancel":{
            notpad.setSaved(false);
            this.setVisible(false);
        }break;
        }
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public JLabel getUrlL() {
        return urlL;
    }

    public void setUrlL(JLabel urlL) {
        this.urlL = urlL;
    }
}