用Java编写的记事本--原创（转载请留言）

package notepad;
import java.awt.Toolkit;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import javax.swing.JFrame;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.event.MenuEvent;
import javax.swing.event.MenuListener;
import javax.swing.event.UndoableEditEvent;
import javax.swing.event.UndoableEditListener;
import javax.swing.undo.UndoManager;
/**
 *
 *@author huyongjian Oracle(Compus Solution Group)
 * @Date  2013-7-26
 * @version 2.0
 * @since JDK1.6（建议）
   Copy Right Information    COMPUS SOLUTION GROUP
   IDE:Eclipse
   class:
   文本编辑区
 */
public class TextArea extends JTextArea implements MouseListener,UndoableEditListener,
MenuListener,ActionListener,ItemListener{
    private static final long serialVersionUID = 1L;
    public boolean Saved;
    public String Name,Path;
    public JScrollPane Pane;
    public JPopupMenu Popup;
    public JMenuItem Redo,Undo,Cut,Copy,Paste,Delete,SelectAll,FindAndReplace;
    public UndoManager Manager;
    public MenuList menu;
    public FindAndReplace find;
    TextArea(JFrame notepad,int x,int y){
        super();
        Saved=true;
        Name=null;
        Path=null;
        Popup=new JPopupMenu();
        Undo=new JMenuItem("  撤消");
        Redo=new JMenuItem("  Redo");
        Cut=new JMenuItem("  剪切");
        Copy=new JMenuItem("  复制");
        Paste=new JMenuItem("  粘贴");
        Delete=new JMenuItem("  删除");
        SelectAll=new JMenuItem("  全选");
        FindAndReplace=new JMenuItem("  查找替换...");
        Pane=new JScrollPane(this);
        Manager=new UndoManager();
        menu=new MenuList();
        find=new FindAndReplace(notepad);
        find.Dialog.setLocation(x,y);
        Undo.setEnabled(false);
        Redo.setEnabled(false);
        setLineWrap(true);
        setWrapStyleWord(true);
        Manager.setLimit(-1);
        Popup.add(Undo);
        Popup.add(Redo);
        Popup.addSeparator();
        Popup.add(Cut);
        Popup.add(Copy);
        Popup.add(Paste);
        Popup.add(Delete);
        Popup.addSeparator();
        Popup.add(SelectAll);
        Popup.add(FindAndReplace);
        add(Popup);
        menu.Edit.addMenuListener(this);
        menu.WordWrap.addItemListener(this);
        menu.Truncation.addItemListener(this);
        getDocument().addUndoableEditListener(this);
        addMouseListener(this);
        find.FindNext.addActionListener(this);
        find.Replace.addActionListener(this);
        find.ReplaceAll.addActionListener(this);
        find.Finish.addActionListener(this);
    }
    public void saveFile(){
        try {
            FileWriter fw = new FileWriter(Path+Name,false);
            BufferedWriter bw=new BufferedWriter(fw);
            bw.write(getText());
            bw.close();
            fw.close();
            Saved=true;
        } catch (IOException e){}
    }
    public void openFile(){
        try {
            int c;
            StringBuffer sb=new StringBuffer();
            FileReader fr=new FileReader(Path+Name);
            setText(null);
            while((c=fr.read())!=-1)
                sb.append((char)c);
            setText(sb.toString());
            Saved=true;
            fr.close();
            Undo.setEnabled(false);
            Redo.setEnabled(false);
            menu.Undo.setEnabled(false);
            menu.Redo.setEnabled(false);
        }
        catch (IOException e){}
    }
    public void delete(){
        int start=getSelectionStart();
        int end=getSelectionEnd();
        replaceRange("",start,end);
    }
    public int lastOf(String s1,int i){
        String s=getText();
        if(find.MatchCase.isSelected()) return s.lastIndexOf(s1,i);
        else{
            s=s.toLowerCase();
            return s.lastIndexOf(s1.toLowerCase(),i);
        }
    }
    public int nextOf(String s1,int i){
        String s=getText();
        if(find.MatchCase.isSelected()) return s.indexOf(s1,i);
        else{
            s=s.toLowerCase();
            return s.indexOf(s1.toLowerCase(),i);
        }
    }
    public void actionPerformed(ActionEvent e){
        Object obj=e.getSource();
        if(obj==find.Finish) find.Dialog.setVisible(false);
        String s1=find.FindText.getText();
        String s2=find.ReplaceText.getText();
        int len1=s1.length(),len2=s2.length();
        if(len1<1) return;
        int head=getSelectionStart(),rear=getSelectionEnd();
        if(obj==find.Replace){
            if(head<rear) replaceRange(s2,head,rear);
            else obj=find.FindNext;
        }
        if(obj==find.FindNext){
            if(find.Up.isSelected()){
                head=lastOf(s1,head-len1);
                if(head<0) return;
                select(head, head+len1);
            }
            else{
                rear=nextOf(s1, rear);
                if(rear<0) return;
                select(rear,rear+len1);
            }
        }
        else if(obj==find.ReplaceAll){
            rear=0;
            while(true){
                rear=nextOf(s1,rear);
                if(rear<0) return;
                replaceRange(s2,rear,rear+len1);
                rear=rear+len2;
                setCaretPosition(rear);
            }
        }
    }
    public void menuSelected(MenuEvent e){
        Clipboard Board=Toolkit.getDefaultToolkit().getSystemClipboard();
        Transferable contents = Board.getContents(Board);
        DataFlavor flavor = DataFlavor.stringFlavor;
        if(contents.isDataFlavorSupported(flavor))
            menu.Paste.setEnabled(true);
        else
            menu.Paste.setEnabled(false);
        if(getSelectedText()!=null){
            menu.Cut.setEnabled(true);
            menu.Copy.setEnabled(true);
            menu.Delete.setEnabled(true);
        }
        else{
            menu.Cut.setEnabled(false);
            menu.Copy.setEnabled(false);
            menu.Delete.setEnabled(false);
        }
        if(getText().isEmpty()){
            menu.SelectAll.setEnabled(false);
            menu.FindAndReplace.setEnabled(false);
        }
        else{
            menu.SelectAll.setEnabled(true);
            menu.FindAndReplace.setEnabled(true);
        }
    }
    public void undoableEditHappened(UndoableEditEvent e){
        Manager.addEdit(e.getEdit());
        Saved=false;
        menu.Undo.setEnabled(true);
        Undo.setEnabled(true);
        menu.Redo.setEnabled(false);
        Redo.setEnabled(false);
    }
    public void mouseReleased(MouseEvent e) {
        if(e.isPopupTrigger())
        {
            Clipboard Board=Toolkit.getDefaultToolkit().getSystemClipboard();
            Transferable contents = Board.getContents(Board);
            DataFlavor flavor = DataFlavor.stringFlavor;
            if(contents.isDataFlavorSupported(flavor))
                Paste.setEnabled(true);
            else
                Paste.setEnabled(false);
            if(getSelectedText()!=null){
                Cut.setEnabled(true);
                Copy.setEnabled(true);
                Delete.setEnabled(true);
            }
            else{
                Cut.setEnabled(false);
                Copy.setEnabled(false);
                Delete.setEnabled(false);
            }
            if(getText().isEmpty()){
                SelectAll.setEnabled(false);
                FindAndReplace.setEnabled(false);
            }
            else{
                SelectAll.setEnabled(true);
                FindAndReplace.setEnabled(true);
            }
            Popup.show(this,e.getX(),e.getY());
        }
    }
    public void itemStateChanged(ItemEvent e) {
        if(e.getSource()==menu.WordWrap){
            setLineWrap(menu.WordWrap.isSelected());
            menu.Truncation.setEnabled(menu.WordWrap.isSelected());
        }
        else
            setWrapStyleWord(!menu.Truncation.isSelected());
    }
    public void mousePressed(MouseEvent e) {}
    public void mouseClicked(MouseEvent e) {}
    public void mouseEntered(MouseEvent e) {}
    public void mouseExited(MouseEvent e) {}
    public void menuCanceled(MenuEvent e) {}
    public void menuDeselected(MenuEvent e) {}
}

第二步：设置菜单

package notepad;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.KeyStroke;
/**
 *
 *@author huyongjian Oracle(Compus Solution Group)
 * @Date  2013-8-5
 * @version 2.0
 * @since JDK1.6（建议）
   Copy Right Information    COMPUS SOLUTION GROUP
   IDE:Eclipse
   class:
   设置菜单
 */
public class MenuList{
    public JMenuBar Menu;
    public JMenu File, Edit, View, Help;
    public JMenuItem
        New,Open,Save,SaveAs,Print,Exit,
        ViewHelp,AboutNotepad,
        Font,Color,
        Undo,Redo,Cut,Copy,Paste,Delete,SelectAll,FindAndReplace;
    public JCheckBoxMenuItem WordWrap,Truncation;
    MenuList(){
        Menu=new JMenuBar();
        File=new JMenu(" 文件(F) ");
        New=new JMenuItem("新建");
        Open=new JMenuItem("打开");
        Save=new JMenuItem("保存");
        SaveAs=new JMenuItem("另存为");
        Print=new JMenuItem("打印...");
        Exit=new JMenuItem("退出");
        Help=new JMenu(" 帮助(H) ");
        ViewHelp=new JMenuItem("查看帮助...");
        AboutNotepad=new JMenuItem("关于记事本...");
        View=new JMenu(" 查看(V) ");
        WordWrap=new JCheckBoxMenuItem("Word Wrap",true);
        Truncation=new JCheckBoxMenuItem("Truncation",false);
        Font=new JMenuItem("字体...");
        Color=new JMenuItem("颜色...");
        Edit=new JMenu(" 编辑(E) ");
        Undo=new JMenuItem("撤消");
        Redo=new JMenuItem("Redo");
        Cut=new JMenuItem("剪切");
        Copy=new JMenuItem("复制");
        Paste=new JMenuItem("粘贴");
        Delete=new JMenuItem("删除");
        SelectAll=new JMenuItem("全选");
        FindAndReplace=new JMenuItem("查找替换...");
        Undo.setEnabled(false);
        Redo.setEnabled(false);
        Edit.add(Undo);
        Edit.add(Redo);
        Edit.addSeparator();
        Edit.add(Cut);
        Edit.add(Copy);
        Edit.add(Paste);
        Edit.add(Delete);
        Edit.addSeparator();
        Edit.add(SelectAll);
        Edit.add(FindAndReplace);
        View.add(WordWrap);
        View.add(Truncation);
        View.addSeparator();
        View.add(Font);
        View.add(Color);
        Help.add(ViewHelp);
        Help.add(AboutNotepad);
        File.add(New);
        File.add(Open);
        File.addSeparator();
        File.add(Save);
        File.add(SaveAs);
        File.addSeparator();
        File.add(Print);
        File.add(Exit);
        Menu.add(File);
        Menu.add(Edit);
        Menu.add(View);
        Menu.add(Help);
        New.setAccelerator(KeyStroke.getKeyStroke('N',128));
        Open.setAccelerator(KeyStroke.getKeyStroke('O',128));
        Save.setAccelerator(KeyStroke.getKeyStroke('S',128));
        Print.setAccelerator(KeyStroke.getKeyStroke('P',128));
        Undo.setAccelerator(KeyStroke.getKeyStroke('Z',128));
        Redo.setAccelerator(KeyStroke.getKeyStroke('Y',128));
        Cut.setAccelerator(KeyStroke.getKeyStroke('X',128));
        Copy.setAccelerator(KeyStroke.getKeyStroke('C',128));
        Paste.setAccelerator(KeyStroke.getKeyStroke('V',128));
        Delete.setAccelerator(KeyStroke.getKeyStroke(127,0));
        SelectAll.setAccelerator(KeyStroke.getKeyStroke('A',128));
    }
}

第三步：字体设置

package notepad;
import java.awt.Font;
import java.awt.GraphicsEnvironment;
import java.awt.List;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JTextArea;
/**
 *
 *@author huyongjian Oracle(Compus Solution Group)
 * @Date  2013-7-26
 * @version 2.0
 * @since JDK1.6（建议）
   Copy Right Information    COMPUS SOLUTION GROUP
   IDE:Eclipse
   class:
   字体设置
 */
public class FontDialog implements ItemListener, ActionListener, WindowListener{
    public JDialog Dialog;
    public JCheckBox Bold,Italic;
    public List Size,Name;
    public int FontName;
    public int FontStyle;
    public int FontSize;
    public JButton OK,Cancel;
    public JTextArea Text;
    FontDialog(JFrame notepad, int x, int y) {
        GraphicsEnvironment g=GraphicsEnvironment.getLocalGraphicsEnvironment();
        String name[]=g.getAvailableFontFamilyNames();
        Bold=new JCheckBox("Bold",false);
        Italic=new JCheckBox("Italic",false);
        Dialog=new JDialog(notepad,"Font...",true);
        Text=new JTextArea("字体预览用例\n9876543210\nAaBbCcXxYyZz");
        OK=new JButton("OK");
        Cancel=new JButton("Cancel");
        Size=new List();
        Name=new List();
        int i=0;
        Name.add("Default Value");
        for(i=0;i<name.length;i++) Name.add(name[i]);
        for(i=8;i<257;i++) Size.add(String.valueOf(i));
        FontName=0;
        FontStyle=0;
        FontSize=8;
        Dialog.setLayout(null);
        Dialog.setLocation(x, y);
        Dialog.setSize(480, 306);
        Dialog.setResizable(false);
        OK.setFocusable(false);
        Cancel.setFocusable(false);
        Bold.setFocusable(false);
        Italic.setFocusable(false);
        Name.setFocusable(false);
        Size.setFocusable(false);
        Name.setBounds(10, 10, 212, 259);
        Dialog.add(Name);
        Bold.setBounds(314, 10, 64, 22);
        Dialog.add(Bold);
        Italic.setBounds(388, 10, 64, 22);
        Dialog.add(Italic);
        Size.setBounds(232, 10, 64, 259);
        Dialog.add(Size);
        Text.setBounds(306, 40, 157, 157);
        Dialog.add(Text);
        OK.setBounds(306, 243, 74, 26);
        Dialog.add(OK);
        Cancel.setBounds(390, 243, 74, 26);
        Dialog.add(Cancel);
        Name.select(FontName);
        Size.select(FontSize);
        Text.setFont(getFont());
        Dialog.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
        Name.addItemListener(this);
        Size.addItemListener(this);
        Bold.addItemListener(this);
        Italic.addItemListener(this);
        OK.addActionListener(this);
        Cancel.addActionListener(this);
        Dialog.addWindowListener(this);
    }
    public void itemStateChanged(ItemEvent e) {
        Text.setFont(getFont());
    }
    public void actionPerformed(ActionEvent e) {
        if(e.getSource()==OK){
            FontName=Name.getSelectedIndex();
            FontStyle=getStyle();
            FontSize=Size.getSelectedIndex();
            Dialog.setVisible(false);
        }
        else cancel();
    }
    public void windowClosing(WindowEvent e) {
        cancel();
    }
    public Font getFont(){
        if(Name.getSelectedIndex()==0) return new Font("新宋体",getStyle(),Size.getSelectedIndex()+8);
        else return new Font(Name.getSelectedItem(),getStyle(),Size.getSelectedIndex()+8);
    }
    public void cancel(){
        Name.select(FontName);
        Size.select(FontSize);
        setStyle();
        Text.setFont(getFont());
        Dialog.setVisible(false);
    }
    public void setStyle(){
        if(FontStyle==0 || FontStyle==2) Bold.setSelected(false);
        else Bold.setSelected(true);
        if(FontStyle==0 || FontStyle==1) Italic.setSelected(false);
        else Italic.setSelected(true);
    }
    public int getStyle(){
        int bold=0,italic=0;
        if(Bold.isSelected()) bold=1;
        if(Italic.isSelected()) italic=1;
        return bold+italic*2;
    }
    public void windowActivated(WindowEvent arg0) {}
    public void windowClosed(WindowEvent arg0) {}
    public void windowDeactivated(WindowEvent arg0) {}
    public void windowDeiconified(WindowEvent arg0) {}
    public void windowIconified(WindowEvent arg0) {}
    public void windowOpened(WindowEvent arg0) {}
}

第四步：查找与替代

package notepad;
import java.awt.TextField;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JRadioButton;
/**
 *
 *@author huyongjian Oracle(Compus Solution Group)
 * @Date  2013-7-26
 * @version 2.0
 * @since JDK1.6（建议）
   Copy Right Information    COMPUS SOLUTION GROUP
   IDE:Eclipse
   class:
   查找替换
 */
public class FindAndReplace{
    public JDialog Dialog;
    public JButton FindNext,Replace,ReplaceAll,Finish;
    public JCheckBox MatchCase;
    public JRadioButton Up,Down;
    public ButtonGroup DirectionGroup;
    public JLabel FindWhat,ReplaceWith,Direction;
    public TextField FindText,ReplaceText;
    FindAndReplace(JFrame notepad){
        Dialog=new JDialog(notepad,"Find And Replace...",false);/*
 * 与EnsureDialog不同的是，这里的模式标志false使对话框始终处于notepad的上端，但点击notepad
 * 时notepad会继续处于活动状态，对话框则变成不活动状态 */
        FindNext=new JButton("查找下一个");
        Replace=new JButton("替换");
        ReplaceAll=new JButton("替换所有");
        Finish=new JButton("取消");
        MatchCase=new JCheckBox("区分大小写",false);
        Down=new JRadioButton("Down",true);
        Up=new JRadioButton("Up",false);
        FindWhat=new JLabel("查找内容(N):");
        ReplaceWith=new JLabel("替换为(P):");
        Direction=new JLabel("Direction:");
        FindText=new TextField("");
        ReplaceText=new TextField("");
        Dialog.setSize(380, 160);
        Dialog.setResizable(false);
        FindNext.setFocusable(false);
        Replace.setFocusable(false);
        ReplaceAll.setFocusable(false);
        MatchCase.setFocusable(false);
        Finish.setFocusable(false);
        Up.setFocusable(false);
        Down.setFocusable(false);
        DirectionGroup=new ButtonGroup();
        Dialog.setLayout(null);
        FindWhat.setBounds(10,12,80,22);
        ReplaceWith.setBounds(10,42,80,22);
        FindText.setBounds(95, 12, 160, 22);
        ReplaceText.setBounds(95, 42, 160, 22);
        FindNext.setBounds(265, 12, 98, 22);
        Replace.setBounds(265, 42, 98, 22);
        ReplaceAll.setBounds(265, 72, 98, 22);
        Direction.setBounds(10, 72, 80, 22);
        MatchCase.setBounds(6, 102, 98, 22);
        Down.setBounds(95, 72, 80, 22);
        Up.setBounds(175, 72, 80, 22);
        Finish.setBounds(265, 102, 98, 22);
        DirectionGroup.add(Up);
        DirectionGroup.add(Down);
        Dialog.add(FindWhat);
        Dialog.add(MatchCase);
        Dialog.add(FindText);
        Dialog.add(FindNext);
        Dialog.add(Direction);
        Dialog.add(ReplaceWith);
        Dialog.add(ReplaceText);
        Dialog.add(Replace);
        Dialog.add(ReplaceAll);
        Dialog.add(Finish);
        Dialog.add(Down);
        Dialog.add(Up);
    }
}

第五步：是否保存

package notepad;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/**
 *
 *@author huyongjian Oracle(Compus Solution Group)
 * @Date  2013-7-26
 * @version 2.0
 * @since JDK1.6（建议）
   Copy Right Information    COMPUS SOLUTION GROUP
   IDE:Eclipse
   class:
   是否保存
 */
public class EnsureDialog implements WindowListener, ActionListener{
    public int YES,NO,CANCEL,Status;
    public JDialog Ensure;
    public JButton Yes,No,Cancel;
    public JLabel Question;
    public JPanel ButtonPanel,TextPanel;
    EnsureDialog(JFrame notepad, int x, int y) {
        YES=0;
        NO=1;
        CANCEL=2;
        Status=CANCEL;
        Ensure=new JDialog(notepad,true);/*
 * 这里的模式标志true的作用是使对话框处于notepad的上端，并且当对话框显示时进程处于停滞状态，
 * 直到对话框不再显示为止。在本程序中，由于对对话框进行了事件监听处理，当对话框消失时状态标
 * 志Status同时发生了变化，这样就可以在进程继续时获得新的Status值 */
        Yes=new JButton("Yes");
        No=new JButton("No");
        Cancel=new JButton("Cancel");
        Question=new JLabel("  是否保存文件?");
        ButtonPanel=new JPanel();
        TextPanel=new JPanel();
        ButtonPanel.setLayout(new FlowLayout(FlowLayout.CENTER,16,10));
        TextPanel.setLayout(new BorderLayout());
        Ensure.setLayout(new BorderLayout());
        ButtonPanel.add(Yes);
        ButtonPanel.add(No);
        ButtonPanel.add(Cancel);
        TextPanel.add(Question);
        Ensure.add(TextPanel,BorderLayout.CENTER);
        Ensure.add(ButtonPanel,BorderLayout.SOUTH);
        Ensure.setLocation(x, y);
        Ensure.setSize(360, 140);
        Ensure.setResizable(false);
        TextPanel.setColor.WHITE);
         Question.setFont(new Font(null,Font.PLAIN,16));
        Question.setForeground(new Color(0,95,191));
        Yes.setFocusable(false);
        No.setFocusable(false);
        Cancel.setFocusable(false);
        Ensure.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
        Ensure.addWindowListener(this);
        Yes.addActionListener(this);
        No.addActionListener(this);
        Cancel.addActionListener(this);
    }
    public void actionPerformed(ActionEvent e){
        if(e.getSource()==Yes) Status=YES;
        else if(e.getSource()==No) Status=NO;
        else if(e.getSource()==Cancel) Status=CANCEL;
        Ensure.setVisible(false);
    }
    public void windowClosing(WindowEvent e){
        Status=CANCEL;
        Ensure.setVisible(false);
    }
    public void windowActivated(WindowEvent e) {}
    public void windowClosed(WindowEvent e) {}
    public void windowDeactivated(WindowEvent e) {}
    public void windowDeiconified(WindowEvent e) {}
    public void windowIconified(WindowEvent e) {}
    public void windowOpened(WindowEvent e) {}
}

第六步：字体设置

package notepad;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
/**
 *
 *@author huyongjian Oracle(Compus Solution Group)
 * @Date  2013-7-26
 * @version 2.0
 * @since JDK1.6（建议）
   Copy Right Information    COMPUS SOLUTION GROUP
   IDE:Eclipse
   class:
   字体设置
 */
public class ColorDialog implements ActionListener, WindowListener{
    public JDialog Dialog;
    public JLabel NFL,NBL,SFL,SBL;
    public JTextArea Normal,Selected;
    public JButton NFB,NBB,SFB,SBB,OK,Cancel,Reset;
    public Color NFC,NBC,SFC,SBC;
    public ColorChooser Chooser;
    public ColorDialog(JFrame notepad, int x, int y){
        NFC=new Color(0,0,0);
        NBC=new Color(249,249,251);
        SFC=new Color(0,0,0);
        SBC=new Color(191,207,223);
        Dialog=new JDialog(notepad,"Color...",true);
        NFL=new JLabel("Normal Foreground:");
        NBL=new JLabel("Normal Background:");
        SFL=new JLabel("Selected Foreground:");
        SBL=new JLabel("Selected Background:");
        Normal=new JTextArea("\n    Normal    正常");
        Selected=new JTextArea("\n    Selected  选中 ");
        NFB=new JButton("");
        NBB=new JButton("");
        SFB=new JButton("");
        SBB=new JButton("");
        OK=new JButton("OK");
        Cancel=new JButton("Cancel");
        Reset=new JButton("Reset");
        Chooser=new ColorChooser(Dialog, x+65, y-15);
        Normal.setEditable(false);
        Normal.setFocusable(false);
        Normal.setFont(new Font("新宋体", 0, 16));
        Normal.setForeground(NFC);
        Normal.setBackground(NBC);
        Selected.setEditable(false);
        Selected.setFocusable(false);
        Selected.setFont(Normal.getFont());
        Selected.setForeground(SFC);
        Selected.setSBC);
         NFB.setBackground(NFC);
        NBB.setBackground(NBC);
        SFB.setSFC);
         SBB.setSBC);
         Dialog.setLayout(null);
        Dialog.setLocation(x, y);
        Dialog.setSize(410, 220);
        Dialog.setResizable(false);
        Reset.setFocusable(false);
        OK.setFocusable(false);
        Cancel.setFocusable(false);
        Dialog.add(Normal);
        Dialog.add(Selected);
        Dialog.add(NFL);
        Dialog.add(NBL);
        Dialog.add(SFL);
        Dialog.add(SBL);
        Dialog.add(SBB);
        Dialog.add(SFB);
        Dialog.add(NBB);
        Dialog.add(NFB);
        Dialog.add(OK);
        Dialog.add(Cancel);
        Dialog.add(Reset);
        SBB.setBounds(144, 100, 60, 22);
        SFB.setBounds(144, 70, 60, 22);
        NBB.setBounds(144, 40, 60, 22);
        NFB.setBounds(144, 10, 60, 22);
        NFL.setBounds(10, 10, 130, 22);
        NBL.setBounds(10, 40, 130, 22);
        SFL.setBounds(10, 70, 130, 22);
        SBL.setBounds(10, 100, 130, 22);
        Normal.setBounds(220, 10, 174, 56);
        Selected.setBounds(220, 66, 174, 56);
        Reset.setBounds(10, 160, 74, 24);
        OK.setBounds(236, 160, 74, 24);
        Cancel.setBounds(320, 160, 74, 24);
        Dialog.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
        Dialog.addWindowListener(this);
        NFB.addActionListener(this);
        NBB.addActionListener(this);
        SFB.addActionListener(this);
        SBB.addActionListener(this);
        Reset.addActionListener(this);
        OK.addActionListener(this);
        Cancel.addActionListener(this);
    }
    public void setTextAreaColor(){
        Normal.setForeground(NFB.getBackground());
        Normal.setBackground(NBB.getBackground());
        Selected.setForeground(SFB.getBackground());
        Selected.setSBB.getBackground());
     }
    public void cancel(){
        Normal.setForeground(NFC);
        Normal.setBackground(NBC);
        Selected.setForeground(SFC);
        Selected.setSBC);
         NFB.setBackground(NFC);
        NBB.setBackground(NBC);
        SFB.setSFC);
         SBB.setSBC);
         Dialog.setVisible(false);
    }
    public void actionPerformed(ActionEvent e) {
        Object obj=e.getSource();
        if(obj==Reset){
            NFB.setBackground(new Color(0,0,0));
            NBB.setBackground(new Color(249,249,251));
            SFB.setBackground(new Color(0,0,0));
            SBB.setBackground(new Color(191,207,223));
            setTextAreaColor();
        }
        else if(obj==OK){
            NFC=NFB.getBackground();
            NBC=NBB.getBackground();
            SFC=SFB.getBackground();
            SBC=SBB.getBackground();
            Dialog.setVisible(false);
        }
        else if(obj==Cancel)
            cancel();
        else{
            Chooser.init(((Component) obj).getBackground());
            Chooser.Dialog.setVisible(true);
            ((Component) obj).setChooser.New.getBackground());
             setTextAreaColor();
        }
    }
    public void windowClosing(WindowEvent e) {
        cancel();
    }
    public void windowActivated(WindowEvent arg0) {}
    public void windowClosed(WindowEvent arg0) {}
    public void windowDeactivated(WindowEvent arg0) {}
    public void windowDeiconified(WindowEvent arg0) {}
    public void windowIconified(WindowEvent arg0) {}
    public void windowOpened(WindowEvent arg0) {}
}
class ColorChooser implements ActionListener,WindowListener,KeyListener{
    JDialog Dialog;
    JButton Choice[][],Old,New,OK,Cancel;
    JPanel Panel;
    JTextField R,G,B;
    JLabel OldLabel,NewLabel,RL,GL,BL;
    ColorChooser(JDialog color,int x, int y){
        Dialog=new JDialog(color,true);
        Choice=new JButton[8][8];
        Panel=new JPanel();
        Old=new JButton("");
        New=new JButton("");
        OldLabel=new JLabel("Old:");
        NewLabel=new JLabel("New:");
        RL=new JLabel("R:");
        GL=new JLabel("G:");
        BL=new JLabel("B:");
        R=new JTextField("");
        G=new JTextField("");
        B=new JTextField("");
        OK=new JButton("OK");
        Cancel=new JButton("Cancel");
        Panel.setLayout(new GridLayout(8,8,0,0));
        int i=0,j=0;
        Color c;
        Choice[0][7]=new JButton("");Choice[0][7].setBackground(new Color(255,255,255));
        Choice[1][7]=new JButton("");Choice[1][7].setBackground(new Color(255,223,191));
        Choice[2][7]=new JButton("");Choice[2][7].setBackground(new Color(255,207,207));
        Choice[3][7]=new JButton("");Choice[3][7].setBackground(new Color(223,191,255));
        Choice[4][7]=new JButton("");Choice[4][7].setBackground(new Color(207,207,255));
        Choice[5][7]=new JButton("");Choice[5][7].setBackground(new Color(191,223,255));
        Choice[6][7]=new JButton("");Choice[6][7].setBackground(new Color(207,255,207));
        Choice[7][7]=new JButton("");Choice[7][7].setBackground(new Color(223,255,191));
        for(i=0;i<8;i++){
            c=Choice[i][7].getBackground();
            for(j=0;j<8;j++){
                if(j!=7){
                    Choice[i][j]=new JButton("");
                    Choice[i][j].setBackground(new Color(c.getRed()*(j+1)/8,c.getGreen()*(j+1)/8,c.getBlue()*(j+1)/8));
                }
                Choice[i][j].setFocusable(false);
                Choice[i][j].addActionListener(this);
                Panel.add(Choice[i][j]);
            }
        }
        Dialog.setSize(280,250);
        Dialog.setLayout(null);
        Dialog.setLocation(x, y);
        Dialog.setResizable(false);
        Dialog.add(Panel);
        Panel.setBounds(10, 10, 160, 160);
        Dialog.add(Old);
        Dialog.add(OldLabel);
        Old.setEnabled(false);
        Old.setBorderPainted(false);
        Old.setBounds(214, 10, 44, 22);
        OldLabel.setBounds(180, 10, 44, 22);
        Dialog.add(New);
        Dialog.add(NewLabel);
        New.setEnabled(false);
        New.setBorderPainted(false);
        New.setBounds(214, 32, 44, 22);
        NewLabel.setBounds(180, 32, 44, 22);
        Dialog.add(R);
        Dialog.add(G);
        Dialog.add(B);
        R.setBounds(214, 97, 44, 22);
        G.setBounds(214, 123, 44, 22);
        B.setBounds(214, 149, 44, 22);
        Dialog.add(RL);
        Dialog.add(GL);
        Dialog.add(BL);
        RL.setBounds(196, 97, 16, 22);
        GL.setBounds(196, 123, 16, 22);
        BL.setBounds(196, 149, 16, 22);
        Dialog.add(OK);
        Dialog.add(Cancel);
        OK.setFocusable(false);
        Cancel.setFocusable(false);
        OK.setBounds(106, 190, 74, 24);
        Cancel.setBounds(190, 190, 74, 24);
        OK.addActionListener(this);
        Cancel.addActionListener(this);
        G.addKeyListener(this);
        R.addKeyListener(this);
        B.addKeyListener(this);
    }
    public void setText(Color c){
        R.setText(String.valueOf(c.getRed()));
        G.setText(String.valueOf(c.getGreen()));
        B.setText(String.valueOf(c.getBlue()));
    }
    public void init(Color c){
        New.setc);
         Old.setc);
         setText(c);
    }
    public void actionPerformed(ActionEvent e) {
        Object obj=e.getSource();
        if(obj==OK) Dialog.setVisible(false);
        else if(obj==Cancel){
            New.setBackground(Old.getBackground());
            Dialog.setVisible(false);
        }
        else{
            New.setBackground(((Component) obj).getBackground());
            setText(New.getBackground());
        }
    }
    public void windowClosing(WindowEvent e) {
        New.setBackground(Old.getBackground());
        Dialog.setVisible(false);
    }
    public void keyReleased(KeyEvent e) {
        try{
            int r,g,b;
            if(R.getText().length()==0) r=0;
            else r=Integer.valueOf(R.getText());
            if(G.getText().length()==0) g=0;
            else g=Integer.valueOf(G.getText());
            if(B.getText().length()==0) b=0;
            else b=Integer.valueOf(B.getText());
            New.setBackground(new Color(r,g,b));
        }
        catch(NumberFormatException nfe){setText(New.getBackground());}
        catch(IllegalArgumentException iae){setText(New.getBackground());}
    }
    public void keyPressed(KeyEvent e) {}
    public void keyTyped(KeyEvent e) {}
    public void windowActivated(WindowEvent arg0) {}
    public void windowClosed(WindowEvent arg0) {}
    public void windowDeactivated(WindowEvent arg0) {}
    public void windowDeiconified(WindowEvent arg0) {}
    public void windowIconified(WindowEvent arg0) {}
    public void windowOpened(WindowEvent arg0) {}
}

第七步：关于我们

package notepad;
import java.awt.Color;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/**
 *
 *@author huyongjian Oracle(Compus Solution Group)
 * @Date  2013-7-26
 * @version 2.0
 * @since JDK1.6（建议）
   Copy Right Information    COMPUS SOLUTION GROUP
   IDE:Eclipse
   class:
   About关于类
 */
public class AboutDialog implements ActionListener{
    public JDialog Dialog;
    public JButton OK,Icon;
    public JLabel Name,Version,Author,Java,Author1,Author2,Author3;
    public JPanel Panel;
    AboutDialog(JFrame notepad, int x, int y) {
        Dialog=new JDialog(notepad,"关于我们...",true);
        OK=new JButton("OK");
        Icon=new JButton(new ImageIcon("images/notepad.png"));
        Name=new JLabel("记事本");
        Version=new JLabel("版本：Version 2.0");
        Java=new JLabel("JRE Version 6.0");
        Author1=new JLabel("研发总监:杨强");
        Author2=new JLabel("程序设计:小夜的传说");
        Author3=new JLabel("代码编写:小夜的传说");
        Author=new JLabel("甲骨文(中国)系统有限公司");
                        
        Panel=new JPanel();
        Color c=new Color(0,95,191);
        Name.setForeground(c);
        Version.setForeground(c);
        Java.setForeground(c);
        Panel.setColor.WHITE);
         OK.setFocusable(false);
        Dialog.setSize(280, 200);
        Dialog.setLocation(x, y);
        Dialog.setResizable(false);
        Dialog.setLayout(null);
        Panel.setLayout(null);
        OK.addActionListener(this);
        Icon.setFocusable(false);
        Icon.setBorderPainted(false);
        Author.setFont(new Font(null,Font.BOLD,11));
        Author1.setFont(new Font(null,Font.BOLD,11));
        Author2.setFont(new Font(null,Font.BOLD,11));
        Author3.setFont(new Font(null,Font.BOLD,11));
        Panel.add(Icon);
        Panel.add(Name);
        Panel.add(Version);
        Panel.add(Author1);
        Panel.add(Author2);
        Panel.add(Author3);
        Panel.add(Author);
        Panel.add(Java);
        Dialog.add(Panel);
        Dialog.add(OK);
        Panel.setBounds(0, 0, 280, 140);
        OK.setBounds(180, 140, 72, 26);
        Name.setBounds(80, 10, 160, 20);
        Version.setBounds(80, 27, 160, 20);
        Author.setBounds(80, 110, 250, 20);
        Author1.setBounds(80,65,250,20);
        Author2.setBounds(80,80,250,20);
        Author3.setBounds(80,95,250,20);
        Java.setBounds(80, 44, 160, 20);
        Icon.setBounds(16, 14, 16, 16);
    }
    public void actionPerformed(ActionEvent e) {
        Dialog.setVisible(false);
    }
}

第八步：函数调用

package notepad;
import java.awt.Dimension;
import java.awt.FileDialog;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.awt.print.PrinterException;
import javax.swing.JFrame;
/**
 *
 *@author huyongjian Oracle(Compus Solution Group)
 * @Date  2013-7-26
 * @version 2.0
 * @since JDK1.6（建议）
   Copy Right Information    COMPUS SOLUTION GROUP
   IDE:Eclipse
   class:
   主函数类
 */
public class NotepadMain implements ActionListener,WindowListener{
    static Dimension screen=Toolkit.getDefaultToolkit().getScreenSize();
    static Image icon=Toolkit.getDefaultToolkit().getImage("images/notepad.jpg");
    JFrame notepad;
    EnsureDialog ensure;
    TextArea text;
    FileDialog dialog;
    FontDialog font;
    ColorDialog color;
    AboutDialog about;
    NotepadMain(){
        notepad=new JFrame("记事本");
        dialog=new FileDialog(notepad);
        text=new TextArea(notepad,screen.width/2-190,screen.height/2-90);
        ensure=new EnsureDialog(notepad,screen.width/2-180,screen.height/2-80);
        font=new FontDialog(notepad,screen.width/2-240,screen.height/2-150);
        color=new ColorDialog(notepad,screen.width/2-205,screen.height/2-110);
        about=new AboutDialog(notepad,screen.width/2-140,screen.height/2-100);
        notepad.setJMenuBar(text.menu.Menu);
        notepad.add(text.Pane);
        notepad.setSize(640,420);
        notepad.setLocation(screen.width/2-320,screen.height/2-220);
        notepad.setMinimumSize(new Dimension(185,185));
        notepad.setIconImage(icon);
        notepad.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
        notepad.addWindowListener(this);
        text.setFont(font.getFont());
        text.setForeground(color.NFC);
        text.setcolor.NBC);
         text.setSelectedTextColor(color.SFC);
        text.setSelectionColor(color.SBC);
        text.menu.Save.addActionListener(this);
        text.menu.SaveAs.addActionListener(this);
        text.menu.Open.addActionListener(this);
        text.menu.New.addActionListener(this);
        text.menu.Exit.addActionListener(this);
        text.menu.Undo.addActionListener(this);
        text.menu.Redo.addActionListener(this);
        text.menu.Cut.addActionListener(this);
        text.menu.Copy.addActionListener(this);
        text.menu.Paste.addActionListener(this);
        text.menu.Delete.addActionListener(this);
        text.menu.SelectAll.addActionListener(this);
        text.menu.FindAndReplace.addActionListener(this);
        text.menu.WordWrap.addActionListener(this);
        text.menu.Truncation.addActionListener(this);
        text.menu.Font.addActionListener(this);
        text.menu.Color.addActionListener(this);
        text.menu.ViewHelp.addActionListener(this);
        text.menu.AboutNotepad.addActionListener(this);
        text.Undo.addActionListener(this);
        text.Redo.addActionListener(this);
        text.Cut.addActionListener(this);
        text.Copy.addActionListener(this);
        text.Paste.addActionListener(this);
        text.Delete.addActionListener(this);
        text.SelectAll.addActionListener(this);
        text.FindAndReplace.addActionListener(this);
    }
    public void windowClosing(WindowEvent e) {
        if(text.Saved) System.exit(0);
        else ensure.Ensure.setVisible(true);
        if(ensure.Status==ensure.YES && saveFile()) System.exit(0);
        else if(ensure.Status==ensure.NO) System.exit(0);
    }
    public void actionPerformed(ActionEvent e) {
        Object obj=e.getSource();
        if(obj==text.menu.Save) saveFile();
        else if(obj==text.menu.SaveAs) saveAsFile();
        else if(obj==text.menu.New){
            if(!(text.Saved)){
                ensure.Ensure.setVisible(true);
                if(ensure.Status==ensure.YES && saveFile()){}
                else if(ensure.Status==ensure.NO){}
                else return;
            }
            newFile();
        }
        else if(obj==text.menu.Open){
            if(!(text.Saved)){
                ensure.Ensure.setVisible(true);
                if(ensure.Status==ensure.YES && saveFile()){}
                else if(ensure.Status==ensure.NO){}
                else return;
            }
            openFile();
        }
        else if(obj==text.menu.Print){
            try {
                text.print();
            } catch (PrinterException pe){}
        }
        else if(obj==text.menu.Exit){
            if(text.Saved) System.exit(0);
            else ensure.Ensure.setVisible(true);
            if(ensure.Status==ensure.YES && saveFile()) System.exit(0);
            else if(ensure.Status==ensure.NO) System.exit(0);
        }
        else if(obj==text.menu.Undo || obj==text.Undo){
            text.Manager.undo();
            text.Saved=false;
            text.menu.Redo.setEnabled(true);
            text.Redo.setEnabled(true);
            if(!text.Manager.canUndo()){
                text.menu.Undo.setEnabled(false);
                text.Undo.setEnabled(false);
            }
        }
        else if(obj==text.menu.Redo || obj==text.Redo){
            text.Manager.redo();
            text.Saved=false;
            text.menu.Undo.setEnabled(true);
            text.Undo.setEnabled(true);
            if(!text.Manager.canRedo()){
                text.menu.Redo.setEnabled(false);
                text.Redo.setEnabled(false);
            }
        }
        else if(obj==text.Cut || obj==text.menu.Cut){
            text.cut();
        }
        else if(obj==text.Copy || obj==text.menu.Copy){
            text.copy();
        }
        else if(obj==text.Paste || obj==text.menu.Paste){
            text.paste();
        }
        else if(obj==text.Delete || obj==text.menu.Delete){
            text.delete();
        }
        else if(obj==text.SelectAll || obj==text.menu.SelectAll){
            text.selectAll();
        }
        else if(obj==text.FindAndReplace || obj==text.menu.FindAndReplace){
            text.find.Dialog.setVisible(true);
        }
        else if(obj==text.menu.Font){
            font.Dialog.setVisible(true);
            if(text.getFont()!=font.getFont())
                text.setFont(font.getFont());
        }
        else if(obj==text.menu.Color){
            color.Dialog.setVisible(true);
            text.setForeground(color.NFC);
            text.setcolor.NBC);
             text.setSelectedTextColor(color.SFC);
            text.setSelectionColor(color.SBC);
            text.setCaretColor(color.NFC);
        }
        else if(obj==text.menu.AboutNotepad){
            about.Dialog.setVisible(true);
        }
    }
    public boolean saveFile(){
        if(text.Name==null){
            dialog.setMode(FileDialog.SAVE);
            dialog.setTitle("Save As...");
            dialog.setFile("Untitled.txt");
            dialog.setVisible(true);
            text.Path=dialog.getDirectory();
            text.Name=dialog.getFile();
        }
        if(text.Name==null) return false;
        text.saveFile();
        notepad.setTitle(text.Name+" - Notepad");
        return true;
    }
    public void saveAsFile(){
        String path=text.Path;
        String name=text.Name;
        dialog.setMode(FileDialog.SAVE);
        dialog.setTitle("Save As...");
        if(text.Name==null)
            dialog.setFile("Untitled.txt");
        else dialog.setFile(text.Name);
        dialog.setVisible(true);
        text.Path=dialog.getDirectory();
        text.Name=dialog.getFile();
        if(text.Name!=null){
            text.saveFile();
            notepad.setTitle(text.Name+" - Notepad");
        }
        else{
            text.Name=name;
            text.Path=path;
        }
    }
    public void openFile(){
        String path=text.Path;
        String name=text.Name;
        dialog.setTitle("Open...");
        dialog.setMode(FileDialog.LOAD);
        dialog.setVisible(true);
        text.Path=dialog.getDirectory();
        text.Name=dialog.getFile();
        if(text.Name!=null){
            text.openFile();
            notepad.setTitle(text.Name+" - Notepad");
        }
        else{
            text.Name=name;
            text.Path=path;
        }
    }
    public void newFile(){
        text.Path=null;
        text.Name=null;
        text.setText(null);
        notepad.setTitle("Notepad");
        text.Saved=true;
        text.Undo.setEnabled(false);
        text.Redo.setEnabled(false);
        text.menu.Undo.setEnabled(false);
        text.menu.Redo.setEnabled(false);
    }
    public static void main(String s[]){
        System.setProperty("java.awt.im.style","on-the-spot"); //去除输入中文时的浮动框
        NotepadMain np=new NotepadMain();
        np.notepad.setVisible(true);
    }
    public void windowActivated(WindowEvent arg0) {}
    public void windowClosed(WindowEvent arg0) {}
    public void windowDeactivated(WindowEvent arg0) {}
    public void windowDeiconified(WindowEvent arg0) {}
    public void windowIconified(WindowEvent arg0) {}
    public void windowOpened(WindowEvent arg0) {}
}

第九步：效果展现