Java简单完整记事本

1、package ks;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.InputEvent;import java.awt.event.ItemEvent;import java.awt.event.ItemListener;import java.awt.event.KeyEvent;import ja

2、va.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.awt.event.WindowListener;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.util.Calendar;import javax.swing.JButton;import javax.swing.JCheckBox;import javax.swing.JCheckBoxMenuItem;

3、import javax.swing.JDialog;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JMenu;import javax.swing.JMenuBar;import javax.swing.JMenuItem;import javax.swing.JOptionPane;import javax.swing.JScrollPane;import javax.swing.JTextArea;import javax.swing.KeyStroke;import javax.

4、swing.event.ChangeEvent;import javax.swing.event.ChangeListener;public class MyNotepad extends JFrame private static final long serialVersionUID = 1L;private boolean flag = true;private File f;private JTextArea jta = new JTextArea();private JFrame frame = new JFrame(无标题记事本);private String result = ;

5、private String value;public MyNotepad() / 菜单栏的构造JMenuBar jmb = new JMenuBar();JMenu menu1 = new JMenu(文件(F);jmb.add(menu1);JMenu menu2 = new JMenu(编辑(E);jmb.add(menu2);JMenu menu3 = new JMenu(格式(O);jmb.add(menu3);JMenu menu4 = new JMenu(查看(V);jmb.add(menu4);JMenu menu5 = new JMenu(帮助(H);jmb.add(menu

6、5);/ 文件选项的下拉菜单JMenuItem fItem = new JMenuItem(新建(N);fItem.setAccelerator(KeyStroke.getKeyStroke(N, InputEvent.CTRL_MASK);/为新建添加快捷键/为新建添加监听fItem.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) String comm = e.getActionCommand();if (新建(N).equals(comm) if (!(frame.getT

7、itle().equals(无标题记事本) if (!flag) write();newNew(); else JFileChooser jfc = new JFileChooser(C:);/ 文件选择器int returnVal = jfc.showDialog(null, 保存为);if (returnVal = JFileChooser.APPROVE_OPTION) / 选择文件后再执行下面的语句，保证了程序的健壮性f = jfc.getSelectedFile();flag = false;write(); else if (!(jta.getText().isEmpty() JF

8、ileChooser jfc = new JFileChooser(C:);/ 文件选择器int returnVal = jfc.showDialog(null, 保存为);if (returnVal = JFileChooser.APPROVE_OPTION) / 选择文件后再执行下面的语句，保证了程序的健壮性f = jfc.getSelectedFile();flag = false;write();newNew(); else newNew(););menu1.add(fItem);JMenuItem fItem1 = new JMenuItem(打开(O).);fItem1.setAc

9、celerator(KeyStroke.getKeyStroke(O,InputEvent.CTRL_MASK);/为打开添加快捷键/为打开添加监听fItem1.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) JFileChooser jfc = new JFileChooser(D:);/ 文件选择器jfc.setDialogType(JFileChooser.OPEN_DIALOG);int returnVal = jfc.showOpenDialog(null);if (r

10、eturnVal = JFileChooser.APPROVE_OPTION) / 选择文件后再执行下面的语句，保证了程序的健壮性f = jfc.getSelectedFile();frame.setTitle(f.getName();result = read();flag = false;value = result;jta.setText(result););menu1.add(fItem1);JMenuItem fItem2 = new JMenuItem(保存(S);fItem2.setAccelerator(KeyStroke.getKeyStroke(S,InputEvent.C

11、TRL_MASK);/为保存添加快捷键/为保存添加监听fItem2.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) JFileChooser jfc = new JFileChooser(C:);/ 文件选择器if (flag) int returnVal = jfc.showDialog(null, 保存为);if (returnVal = JFileChooser.APPROVE_OPTION) / 选择文件后再执行下面的语句，保证了程序的健壮性f = jfc.getSele

12、ctedFile();flag = false;write(); else write(););menu1.add(fItem2);JMenuItem fItem3 = new JMenuItem(另存为(A).);/为另存为添加监听fItem3.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) JFileChooser jfc = new JFileChooser(C:);/ 文件选择器int returnVal = jfc.showDialog(null, 另存);if (re

13、turnVal = JFileChooser.APPROVE_OPTION) / 选择文件后再执行下面的语句，保证了程序的健壮性f = jfc.getSelectedFile();write(););menu1.add(fItem3);menu1.addSeparator(); /添加分割线JMenuItem fItem4 = new JMenuItem(退出(X);/为退出添加监听fItem4.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) Object options=退出,

14、返回;int option=JOptionPane.showOptionDialog(null,您确定要退出吗？请注意保存文件！,退出程序？,JOptionPane.OK_CANCEL_OPTION,JOptionPane.WARNING_MESSAGE,null,options,options0);if(option=JOptionPane.OK_OPTION)System.exit(0););menu1.add(fItem4);/ 编辑选项的下拉菜单JMenuItem eItem = new JMenuItem(撤销(U);eItem.setAccelerator(KeyStroke.ge

15、tKeyStroke(Z, InputEvent.CTRL_MASK);/添加快捷键/添加监听eItem.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) String comm = e.getActionCommand();if (撤销(U).equals(comm) jta.setText(value););menu2.add(eItem);menu2.addSeparator(); /添加分割线JMenuItem eItem1 = new JMenuItem(剪切(T);eI

16、tem1.setAccelerator(KeyStroke.getKeyStroke(X,InputEvent.CTRL_MASK);/添加快捷键/添加监听eItem1.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) String comm = e.getActionCommand();if (剪切(T).equals(comm) value = jta.getText();jta.cut(););menu2.add(eItem1);JMenuItem eItem2 = new

17、JMenuItem(复制(C);eItem2.setAccelerator(KeyStroke.getKeyStroke(C,InputEvent.CTRL_MASK);/添加快捷键/添加监听eItem2.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) String comm = e.getActionCommand();if (复制(C).equals(comm) jta.copy(););menu2.add(eItem2);JMenuItem eItem3 = new JMe

18、nuItem(粘贴(P);eItem3.setAccelerator(KeyStroke.getKeyStroke(V,InputEvent.CTRL_MASK);/添加快捷键/添加监听eItem3.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) String comm = e.getActionCommand();if (粘贴(P).equals(comm) jta.paste(););menu2.add(eItem3);JMenuItem eItem4 = new JMenu

19、Item(删除(L);eItem4.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE,InputEvent.BUTTON1_MASK);/添加快捷键/添加监听eItem4.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) String comm = e.getActionCommand(); if (删除(L).equals(comm) value = jta.getText();jta.replaceSelectio

20、n(null); );menu2.add(eItem4);menu2.addSeparator(); /添加分割线JMenuItem eItem5= new JMenuItem(查找(F).);eItem5.setAccelerator(KeyStroke.getKeyStroke(F,InputEvent.CTRL_MASK);/添加快捷键menu2.add(eItem5);JMenuItem eItem6 = new JMenuItem(替换(R).);eItem6.setAccelerator(KeyStroke.getKeyStroke(H,InputEvent.CTRL_MASK);

21、/添加快捷键menu2.add(eItem6);menu2.addSeparator(); /添加分割线JMenuItem eItem7 = new JMenuItem(全选(A);eItem7.setAccelerator(KeyStroke.getKeyStroke(A,InputEvent.CTRL_MASK);/添加快捷键/添加快捷键eItem7.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) String comm = e.getActionCommand();if (

22、全选(A).equals(comm) jta.selectAll(););menu2.add(eItem7);JMenuItem eItem8 = new JMenuItem(时间/日期(D);eItem8.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F5,InputEvent.BUTTON1_MASK);/添加快捷键/添加监听eItem8.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) String comm = e.ge

23、tActionCommand();if (时间/日期(D).equals(comm) Calendar c = Calendar.getInstance();jta.setText(c.get(Calendar.YEAR) + 年+ (c.get(Calendar.MONTH) + 1) + 月+ c.get(Calendar.DAY_OF_MONTH) + 日+ c.get(Calendar.HOUR_OF_DAY) + :+ c.get(Calendar.MINUTE) + :+ c.get(Calendar.SECOND););menu2.add(eItem8);/ 格式选项的下拉菜单f

24、inal JCheckBoxMenuItem oItem = new JCheckBoxMenuItem(自动换行(W);ActionListener listener = null;oItem.addActionListener(listener);oItem.addChangeListener(new ChangeListener() public void stateChanged(ChangeEvent e) if(oItem.isSelected()jta.setLineWrap(true);elsejta.setLineWrap(false););menu3.add(oItem);

25、JMenuItem oItem1= new JMenuItem(字体(F).);oItem1.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) String comm = e.getActionCommand();if(字体(F).equals(comm)FontDialog fontDialog=new FontDialog(MyNotepad.this);fontDialog.setVisible(true);if(jta.getFont()!=fontDialog.getFo

26、nt()jta.setFont(fontDialog.getFont(););menu3.add(oItem1);/ 查看选项的下拉菜单的复选框JCheckBox vItem = new JCheckBox(状态栏(S);menu4.add(vItem);/ 帮助选项的下拉菜单JMenuItem hItem = new JMenuItem(关于记事本(A);hItem.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) JOptionPane.showMessageDialog(nul

27、l,此记事本为个人记事本n+作者：黄定银n+时间：2013年1月15日, 关于记事本,JOptionPane.INFORMATION_MESSAGE););menu5.add(hItem);frame.setJMenuBar(jmb);JScrollPane jsp = new JScrollPane(jta);/ 滚动窗口面板frame.add(jsp);frame.setLocation(200, 50);frame.setSize(620, 660);frame.setVisible(true);frame.addWindowListener(new WindowAdapter()pub

28、lic void windowClosing(WindowEvent e) int option=JOptionPane.showConfirmDialog(null,你确定关闭吗？,关闭提示,JOptionPane.OK_CANCEL_OPTION,JOptionPane.WARNING_MESSAGE);if (option=JOptionPane.OK_OPTION) System.exit(0); else return;);frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE); /read方法public String

29、read() String temp = ;try FileInputStream fis = new FileInputStream(f.getAbsolutePath();byte b = new byte1024;while (true) int num = fis.read(b);if (num = -1)break;temp = temp + new String(b, 0, num);fis.close(); catch (Exception e1) e1.printStackTrace();return temp;/write方法public void write() try F

30、ileOutputStream fos = new FileOutputStream(f);fos.write(jta.getText().getBytes();fos.close(); catch (Exception e) e.printStackTrace();/newNew方法public void newNew() frame.dispose();new MyNotepad();flag = true;/创建字体设置对话面板public class FontDialog extends JDialog implements ItemListener,ActionListener, W

31、indowListenerprivate static final long serialVersionUID = 1L;public JCheckBox Bold=new JCheckBox(Bold,false);public JCheckBox Italic=new JCheckBox(Italic,false); public List Size,Name; public int FontName; public int FontStyle; public int FontSize; public JButton OK=new JButton(OK); public JButton C

32、ancel=new JButton(Cancel); public JTextArea Text=new JTextArea(字体预览文本域nnAaBbCcXxYyZz); public FontDialog(JFrame owner) super(owner, 字体设置,true); GraphicsEnvironment g=GraphicsEnvironment.getLocalGraphicsEnvironment(); String name=g.getAvailableFontFamilyNames(); Name=new List(); Size=new List(); Font

33、Name=0; FontStyle=0; FontSize=8; int i=0; Name.add(Default Value); for(i=0;iname.length;i+) Name.add(namei); for(i=8;i257;i+) Size.add(String.valueOf(i); this.setLayout(null); this.setBounds(250,200,480, 306); this.setResizable(false); OK.setFocusable(false); Cancel.setFocusable(false); Bold.setFocu

34、sable(false); Italic.setFocusable(false); Name.setFocusable(false); Size.setFocusable(false); Name.setBounds(10, 10, 212, 259); this.add(Name); Bold.setBounds(314, 10, 64, 22); this.add(Bold); Italic.setBounds(388, 10, 64, 22); this.add(Italic); Size.setBounds(232, 10, 64, 259); this.add(Size); Text

35、.setBounds(306, 40, 157, 157); this.add(Text); OK.setBounds(306, 243, 74, 26); this.add(OK); Cancel.setBounds(390, 243, 74, 26); this.add(Cancel); Name.select(FontName); Size.select(FontSize); Text.setFont(getFont(); Name.addItemListener(this); Size.addItemListener(this); Bold.addItemListener(this); Italic.addItemListener(this); OK.addActionListener(this); Cancel.addActionListener(this); this.addWindowListener(this); public void itemStateChanged(ItemEvent e) Text.setFont(getFont(); public void actionPerfo