java下的记事本

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package com.notepad.text;import java.text.DateFormat;import java.text.SimpleDateFormat;import java.util.Date;public class Datepad {public static  String getdate(){Date date = new Date();DateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss EE");return df.format(date);}}－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

package com.notepad.text;import java.awt.event.*;import javax.swing.*;import javax.swing.event.*;import java.awt.*;public class fontDialog extends JDialog implements ActionListener,ListSelectionListener{    public  static final int Cancle=0;    public  static final int OK=1;    public static final String [] style={"正常","斜体","粗体","粗斜体"};    public static final String [] size={"8","9","10","11","12","14","16",                "18","20","22","24","26","28","36","48","72"};    private Font userFont=null;    private int  userSelect=Cancle;    private JFrame      parent=null;    private Container   con;    private JScrollPane  nameSPane,styleSPane,sizeSPane;    private JPanel      panel[];    private JLabel      nameLbl,styleLbl,sizeLbl;    private JTextField  nameText,styleText,sizeText;    private JList       nameList,styleList,sizeList;    private JButton     OKBtn,cancleBtn;    public fontDialog() {        this(null);    }        public fontDialog(JFrame owner){        super(owner,true);        parent=owner;        setTitle("字体");        con=getContentPane();        BoxLayout box=new BoxLayout(con,BoxLayout.Y_AXIS);        con.setLayout(box);        panel=new JPanel[4];        for(int i=0;i<3;i++){            panel[i]=new JPanel();            panel[i].setLayout(new GridLayout(1,3));        }        panel[3]=new JPanel();        panel[3].setLayout(new FlowLayout());                nameLbl=new JLabel("字体");        styleLbl=new JLabel("字形");        sizeLbl=new JLabel("大小");        panel[0].add(nameLbl);        panel[0].add(styleLbl);        panel[0].add(sizeLbl);                nameText=new JTextField("宋体");        nameText.setColumns(5);        nameText.setEditable(false);        styleText=new JTextField("正常");        styleText.setColumns(5);        styleText.setEditable(false);        sizeText=new JTextField("12");        sizeText.setColumns(5);        sizeText.setEditable(false);        panel[1].add(nameText);        panel[1].add(styleText);        panel[1].add(sizeText);            GraphicsEnvironment eq = GraphicsEnvironment.getLocalGraphicsEnvironment();        String[] availableFonts= eq.getAvailableFontFamilyNames();        nameList=new JList(availableFonts);        nameList.addListSelectionListener(this);        nameSPane=new JScrollPane(nameList);        styleList=new JList(style);        styleList.addListSelectionListener(this);        styleSPane=new JScrollPane(styleList);        sizeList=new JList(size);        sizeList.addListSelectionListener(this);        sizeSPane=new JScrollPane(sizeList);        panel[2].add(nameSPane);        panel[2].add(styleSPane);        panel[2].add(sizeSPane);            OKBtn=new JButton("确定");        OKBtn.addActionListener(this);        cancleBtn=new JButton("取消");        cancleBtn.addActionListener(this);        panel[3].add(OKBtn);        panel[3].add(cancleBtn);            for(int i=0;i<4;i++)            con.add(panel[i]);    }        public int showFontDialog(){    setSize(300,300);    int x,y;    if (parent!=null){        x=parent.getX()+30;        y=parent.getY()+30;    }else{        x=150;        y=100;    }    setLocation(new Point(x,y));    setVisible(true);    return userSelect;     }    public Font getFont(){    return userFont;    }    public void actionPerformed(ActionEvent e){        int styleIndex=Font.PLAIN,fontSize;        if(e.getSource()==OKBtn){                   if(styleText.getText().equals("正常"))                styleIndex=Font.PLAIN;            if(styleText.getText().equals("斜体"))                styleIndex=Font.ITALIC;            if(styleText.getText().equals("粗体"))                styleIndex=Font.BOLD;            if(styleText.getText().equals("粗斜体"))                styleIndex=Font.BOLD | Font.ITALIC;            fontSize=Integer.parseInt(sizeText.getText());            userFont=new Font(nameText.getText(),styleIndex,fontSize);            userSelect=OK;            setVisible(false);        }else{            userSelect=Cancle;            setVisible(false);        }    }        public void valueChanged(ListSelectionEvent e){        if (e.getSource()==nameList)            nameText.setText((String)nameList.getSelectedValue());        if (e.getSource()==styleList)            styleText.setText((String)styleList.getSelectedValue());        if (e.getSource()==sizeList)            sizeText.setText((String)sizeList.getSelectedValue());    }}－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

package com.notepad.text;import java.awt.*;import javax.swing.*;import java.awt.event.*;public class AboutBorder extends JFrame implements ActionListener{private JFrame frame;public AboutBorder(){frame = new JFrame("About Notepad");JPanel pane = new JPanel();pane.setLayout(new FlowLayout(FlowLayout.RIGHT));JLabel label = new JLabel("About Notepad Verson  1.0  , auhtor----刘涛",JLabel.CENTER);JButton button_OK = new JButton("OK");button_OK.addActionListener(this);pane.add(button_OK);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.add(label , BorderLayout.CENTER);frame.add(pane , BorderLayout.SOUTH);frame.setBounds(200, 200, 300, 100);frame.setResizable(false);frame.setVisible(true);}public void actionPerformed(ActionEvent e) {frame.setVisible(false);}}－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

package com.notepad.text;import java.awt.*;import javax.swing.*;import javax.swing.filechooser.FileNameExtensionFilter;import java.io.*;import java.awt.event.*;public class NotePad extends JFrame{private JFrame mainframe;private JTextArea textarea ;private JScrollPane jsp ;private JMenuBar jmb ;private JMenu File , Edit , Format ,View , Help ;private JMenuItem F_new , F_open , F_save, F_saveas ,  F_page ,F_print , F_exit ;  //File菜单private JMenuItem E_undo , E_cut , E_copy , E_paste , E_delete, E_find ,  E_findnext , E_replace , E_go , E_seletall ,E_date ;//Edit菜单private JMenuItem FM_word , FM_font ;//Format菜单private JMenuItem V_status ; //View菜单private JMenuItem H_view , H_about ; //Help菜单private JFileChooser chooser ;private String title = null;private String text ;/* * 主构造函数 NotePad() */public NotePad(){buildLayout();}/* * 窗体构建buildLayout() */private void buildLayout(){mainframe = new JFrame(title + " - Notepad");Container con = mainframe.getContentPane();textarea = new JTextArea();textarea.setWrapStyleWord(true);jsp = new JScrollPane(textarea);jmb = new JMenuBar();jmb.setBorderPainted(true);//菜单主项File = new JMenu("File");Edit = new JMenu("Edit");Format = new JMenu("Format");View  = new JMenu("View");Help  = new JMenu("Help");//File子菜单项 F_new    = new JMenuItem("New"); F_new.addActionListener(new CAL()); F_open   = new JMenuItem("Open..."); F_open.addActionListener(new CAL()); F_save   = new JMenuItem("Save"); F_save.addActionListener(new CAL()); F_saveas = new JMenuItem("Save As..."); F_saveas.addActionListener(new CAL()); F_page   = new JMenuItem("Page Setup..."); F_print  = new JMenuItem("Print..."); F_exit   = new JMenuItem("Exit"); F_exit.addActionListener(new CAL());//Edit子菜单项 E_undo  = new JMenuItem("Undo"); E_cut  = new JMenuItem("Cut"); E_cut.addActionListener(new CAL()); E_copy  = new JMenuItem("Copy"); E_copy.addActionListener(new CAL()); E_paste  = new JMenuItem("Paste"); E_paste.addActionListener(new CAL()); E_delete = new JMenuItem("Delete"); E_delete.addActionListener(new CAL()); E_find  = new JMenuItem("Find..."); E_findnext  = new JMenuItem("Find Next..."); E_replace  = new JMenuItem("Replace..."); E_go  = new JMenuItem("Go To..."); E_seletall  = new JMenuItem("Selet All"); E_seletall.addActionListener(new CAL()); E_date  = new JMenuItem("Time/Date"); E_date.addActionListener(new CAL());//Format子菜单项 FM_word = new JMenuItem("Word Wrap"); FM_font = new JMenuItem("Font..."); FM_font.addActionListener(new CAL());//View子菜单项 V_status =  new JMenuItem("Status Bar"); V_status.setEnabled(false);//Help子菜单项 H_view =  new JMenuItem(" View Help "); H_about =  new JMenuItem("About NotePad"); H_about.addActionListener(new CAL());jmb.add(File);jmb.add(Edit);jmb.add(Format);jmb.add(View);jmb.add(Help);File.add(F_new);File.add(F_open);File.add(F_save);File.add(F_saveas);File.insertSeparator(3);     File.add(F_page);File.add(F_print);File.insertSeparator(12);File.add(F_exit);Edit.add(E_undo);Edit.insertSeparator(3);Edit.add(E_cut);Edit.add(E_copy);Edit.add(E_paste);Edit.add(E_delete);Edit.insertSeparator(12);Edit.add(E_find);Edit.add(E_findnext);Edit.add(E_replace);Edit.add(E_go);Edit.insertSeparator(20);Edit.add(E_seletall);Edit.add(E_date);Format.add(FM_word);Format.add(FM_font);View.add(V_status); Help.add(H_view);Help.insertSeparator(6);Help.add(H_about);con.add(jsp , BorderLayout.CENTER);ImageIcon ii = new ImageIcon("Notepad.gif");mainframe.setIconImage(ii.getImage());textarea.setSelectedTextColor(Color.red);Dimension d = Toolkit.getDefaultToolkit().getScreenSize(); //获取显示器大小mainframe.setJMenuBar(jmb);mainframe.setSize(d);mainframe.addWindowListener(new WindowAdapter(){public void windowClosing(WindowEvent e){if(text.equals(textarea.getText())){JFileChooser chooser = new JFileChooser("D:\\");  FileNameExtensionFilter filter = new FileNameExtensionFilter("*.txt", "java", "txt");  chooser.setFileFilter(filter);  chooser.showSaveDialog(mainframe); try {WriteText(chooser.getSelectedFile().getAbsoluteFile());} catch (IOException e1) {JOptionPane.showMessageDialog(mainframe, "请输入文件名！！！" , "Error" , JOptionPane.ERROR_MESSAGE);}}else{System.exit(0);}}});mainframe.setVisible(true);} public static void main(String[] args) {      new NotePad(); }  /*  * 文本读取  */ private void ReadText(File fileName) throws IOException{ FileInputStream fis = new FileInputStream(fileName); BufferedInputStream bis = new BufferedInputStream(fis);byte[] buf = new byte[(int)fileName.length()];while((bis.read(buf))!=-1){text = new String(buf);textarea.setText(text);}bis.close();fis.close(); }  /*  * 文本存储  */ private void WriteText(File absoluteFile) throws IOException { FileOutputStream fos = new FileOutputStream(absoluteFile); PrintWriter pw = new PrintWriter(fos);String str = textarea.getText(); pw.write(str);pw.close(); } /*  * 为菜单添加监听器  */ class CAL implements ActionListener{public void actionPerformed(ActionEvent e) {if(e.getSource()==F_new){mainframe.setTitle(title+ " - Notepad");textarea.setText("");}if(e.getSource()==E_date){int end = 0 ;int start  = 0 ;start = textarea.getSelectionStart();end = textarea.getSelectionEnd();String end_s = textarea.getText().substring(0, start);String end_e = textarea.getText().substring(end, textarea.getText().length());textarea.setText(end_s+Datepad.getdate()+end_e);textarea.setCaretPosition(start);}if(e.getSource()==E_seletall){textarea.selectAll();}if(e.getSource()==E_delete){int end = 0 ;int start  = 0 ;start = textarea.getSelectionStart();end = textarea.getSelectionEnd();String end_s = textarea.getText().substring(0, start);String end_e = textarea.getText().substring(end, textarea.getText().length());textarea.setText(end_s+end_e);textarea.setCaretPosition(start);}if(e.getSource()==E_copy){textarea.copy();}if(e.getSource()==E_paste){textarea.paste();}if(e.getSource()==E_cut){textarea.cut();}if(e.getSource()==H_about){new AboutBorder();}if(e.getSource()==FM_font){fontDialog fd = new fontDialog(mainframe);fd.showFontDialog();Font font = fd.getFont();textarea.setFont(font);}if(e.getSource()==F_save){try {WriteText(chooser.getSelectedFile().getAbsoluteFile());} catch (IOException e1) {}}if(e.getSource()==F_exit){System.exit(0);}if(e.getSource()==F_open){   chooser = new JFileChooser("D:\\");  FileNameExtensionFilter filter = new FileNameExtensionFilter("*.txt", "java", "txt");  chooser.setFileFilter(filter);  chooser.showOpenDialog(mainframe); try {mainframe.setTitle(chooser.getSelectedFile().getName()+"--Notepad");ReadText(chooser.getSelectedFile().getAbsoluteFile());} catch (IOException e1) {JOptionPane.showMessageDialog(mainframe, "文件不存在或不允许访问！！！" , "Error" , JOptionPane.ERROR_MESSAGE);}}if(e.getSource()==F_saveas){JFileChooser chooser = new JFileChooser("D:\\");  FileNameExtensionFilter filter = new FileNameExtensionFilter("*.txt", "java", "txt");  chooser.setFileFilter(filter);  chooser.showSaveDialog(mainframe); try {WriteText(chooser.getSelectedFile().getAbsoluteFile());} catch (IOException e1) {JOptionPane.showMessageDialog(mainframe, "请输入文件名！！！" , "Error" , JOptionPane.ERROR_MESSAGE);}}}  }}－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－

	
					
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