Java 简易 文本编辑器.docx

import java.awt.*;import java.io.*;import java.util.Calendar;import java.awt.event.*;import javax.swing.*;import javax.swing.event.*;public class TestNotePad public static void main(String args)TextAreaFrame frame = new TextAreaFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);class TextAreaFrame extends JFrame implements ActionListenerpublic TextAreaFrame()setTitle(NotePad);setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);chooser.setCurrentDirectory(new File(.);/建立一个面板，放置按钮buttonPanel = new JPanel();/斜体、粗体选框bold = new JCheckBox(Bold);buttonPanel.add(bold);bold.addActionListener(new ActionListener()public void actionPerformed(ActionEvent event) Font currentFont=textArea.getFont();int style=0;Font newFont=null;if(bold.isSelected()style=Font.BOLD;if(italic.isSelected()style+=Font.ITALIC;elseif(italic.isSelected()style+=Font.ITALIC;elsestyle=Font.PLAIN;newFont=currentFont.deriveFont(style);textArea.setFont(newFont););italic = new JCheckBox(Italic);buttonPanel.add(italic);italic.addActionListener(new ActionListener()public void actionPerformed(ActionEvent event) Font currentFont=textArea.getFont();int style=0;Font newFont=null;if(bold.isSelected()style=Font.BOLD;if(italic.isSelected()style+=Font.ITALIC;elseif(italic.isSelected()style+=Font.ITALIC;elsestyle=Font.PLAIN;newFont=currentFont.deriveFont(style);textArea.setFont(newFont););/改变字体颜色colorCombo = new JComboBox();colorCombo.setEditable(true); colorCombo.addItem(Red); colorCombo.addItem(Blue);colorCombo.addItem(Black);buttonPanel.add(colorCombo);colorCombo.addActionListener(new ActionListener()public void actionPerformed(ActionEvent event) int index=colorCombo.getSelectedIndex();String v=(String)(colorCombo.getItemAt(index);if(v.equalsIgnoreCase(red)textArea.setForeground(Color.RED);else if(v.equalsIgnoreCase(blue)textArea.setForeground(Color.BLUE);elsetextArea.setForeground(Color.BLACK););colorButton=new JButton(ChangeColor);buttonPanel.add(colorButton);colorButton.addActionListener(new ActionListener()public void actionPerformed(ActionEvent event) Color selectedColor = JColorChooser.showDialog(TextAreaFrame.this,颜色选择, Color.black);textArea.setForeground(selectedColor); );/改变字体大小jsFontSize=new JSlider(JSlider.HORIZONTAL,10,50,16);jsFontSize.setMajorTickSpacing(10);jsFontSize.setMinorTickSpacing(1);jsFontSize.setPaintTicks(true);jsFontSize.setPaintLabels(true);jsFontSize.addChangeListener(new ChangeListener()public void stateChanged(ChangeEvent e) JSlider source = (JSlider)e.getSource(); if (!source.getValueIsAdjusting() int size=source.getValue(); Font currentFont=textArea.getFont(); Font newFont=currentFont.deriveFont(float)size); textArea.setFont(newFont); );buttonPanel.add(jsFontSize);/改变字体种类GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();String fonts = ge.getAvailableFontFamilyNames();fontList=new JComboBox(fonts);fontList.addActionListener(new ActionListener()public void actionPerformed(ActionEvent event)String fontname=(String)fontList.getSelectedItem();int size=textArea.getFont().getSize();int style=textArea.getFont().getStyle();textArea.setFont(new Font(fontname,style,size);); buttonPanel.add(fontList);add(buttonPanel, BorderLayout.SOUTH);textArea = new JTextArea(8, 40);scrollPane = new JScrollPane(textArea);add(scrollPane, BorderLayout.CENTER);/菜单menuBar=new JMenuBar();fileMenu=new JMenu( File(F) );editMenu=new JMenu( Edit(E) );styleMenu=new JMenu( Style(S) );helpMenu=new JMenu( Help(H) );menuBar.add(fileMenu);menuBar.add(editMenu);menuBar.add(styleMenu);menuBar.add(helpMenu);fOpen=new JMenuItem(Open);fSave=new JMenuItem(Save);fExit=new JMenuItem(Exit);eCut=new JMenuItem(Cut);eCopy=new JMenuItem(Copy);ePaste=new JMenuItem(Paste);eDate=new JMenuItem(Date/Time);hAbout=new JMenuItem(About);sBold=new JCheckBoxMenuItem(Bold);sItalic=new JCheckBoxMenuItem(Italic);sLineWrap=new JCheckBoxMenuItem(LineWrap);fileMenu.add(fOpen);fileMenu.add(fSave);fileMenu.add(fExit);editMenu.add(eCut);editMenu.add(eCopy);editMenu.add(ePaste);editMenu.add(eDate);helpMenu.add(hAbout);styleMenu.add(sBold);styleMenu.add(sItalic);styleMenu.add(sLineWrap);this.setJMenuBar(menuBar);fOpen.addActionListener(this);fSave.addActionListener(this);fExit.addActionListener(this);eCut.addActionListener(this);eCopy.addActionListener(this);ePaste.addActionListener(this);eDate.addActionListener(this);hAbout.addActionListener(this);fileMenu.setMnemonic(KeyEvent.VK_F);editMenu.setMnemonic(KeyEvent.VK_E);styleMenu.setMnemonic(KeyEvent.VK_S);helpMenu.setMnemonic(KeyEvent.VK_H);fOpen.setMnemonic(KeyEvent.VK_O);fOpen.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MASK);fSave.setMnemonic(KeyEvent.VK_S);fSave.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK);fExit.setMnemonic(KeyEvent.VK_X);fExit.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.BUTTON1_MASK); eCut.setMnemonic(KeyEvent.VK_X);eCut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X,InputEvent.CTRL_MASK);eCopy.setMnemonic(KeyEvent.VK_C);eCopy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C,InputEvent.CTRL_MASK);ePaste.setMnemonic(KeyEvent.VK_V);ePaste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V,InputEvent.CTRL_MASK);hAbout.setMnemonic(KeyEvent.VK_A);hAbout.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A,InputEvent.CTRL_MASK);sLineWrap.addActionListener(new ActionListener()public void actionPerformed(ActionEvent event)if(sLineWrap.isSelected()textArea.setLineWrap(true);elsetextArea.setLineWrap(false););sBold.addActionListener(new ActionListener()public void actionPerformed(ActionEvent event) Font currentFont=textArea.getFont();int style=0;Font newFont=null;if(sBold.isSelected()style=Font.BOLD;if(sItalic.isSelected()style+=Font.ITALIC;elseif(sBold.isSelected()style+=Font.ITALIC;elsestyle=Font.PLAIN;newFont=currentFont.deriveFont(style);textArea.setFont(newFont););sItalic.addActionListener(new ActionListener()public void actionPerformed(ActionEvent event) Font currentFont=textArea.getFont();int style=0;Font newFont=null;if(sItalic.isSelected()style=Font.ITALIC;if(sBold.isSelected()style+=Font.BOLD;elseif(sItalic.isSelected()style+=Font.BOLD;elsestyle=Font.PLAIN;newFont=currentFont.deriveFont(style);textArea.setFont(newFont););public void actionPerformed(ActionEvent e)String command=e.getActionCommand();if(e.getSource() instanceof JMenuItem)if(command.equals(Open)open();else if(command.equals(Save)save();else if(command.equals(Exit)System.exit(0);else if(command.equals(Cut)textArea.cut();else if(command.equals(Copy)textArea.copy();else if(command.equals(Paste)textArea.paste();else if(command.equals(LineWrap)textArea.setLineWrap(true);else if(command.equals(Date/Time)showTime();else if(command.equals(About)about(); /时间戳方法 private void showTime() Calendar date = Calendar.getInstance();textArea.append(+date.get(Calendar.HOUR)+:+date.get(Calendar.MINUTE)+:+date.get(Calendar.SECOND)+ +date.get(Calendar.YEAR)+-+(date.get(Calendar.MONTH)+1)+-+date.get(Calendar.DATE);private void about() JOptionPane.showMessageDialog(null,这是一个简易的文字编辑器。n作者：XXX); /保存方法 protected void save() if(chooser.showSaveDialog(this) = JFileChooser.APPROVE_OPTION)File file = chooser.getSelectedFile();tryBufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(file);byte b = (textArea.getText().getBytes();out.write(b,0,b.length);out.close();jlbStatus.setText(file.getName()+ Saved);catch(IOException ex)jlbStatus.setText(Error saving+file.getName(); /打开方法protected void open() if(chooser.showOpenDialog(this) = JFileChooser.APPROVE_OPTION)File file = chooser.getSelectedFile();tryBufferedInputStream in = new BufferedInputStream(new FileInputStream(fi