宁波网站建设公司立找亿企邦,代理招商网免费加盟,建酒店网站,如何构建大型网站架构一、前言 聚天地之灵气#xff0c;集日月之精华#xff01;一个简单的java文本编辑器由此而生。毕设所需#xff0c;很是无奈#xff01; 二、界面预览 三、实现思路 1.字体选择器的实现 (1).字体类 class MyFont{private Font font;private Color color;public Font getFo… 一、前言 聚天地之灵气集日月之精华一个简单的java文本编辑器由此而生。毕设所需很是无奈 二、界面预览 三、实现思路 1.字体选择器的实现 (1).字体类 class MyFont{private Font font;private Color color;public Font getFont() {return font;}public void setFont(Font font) {this.font font;}public Color getColor() {return color;}public void setColor(Color color) {this.color color;}//字体名称索引private int familyIndex -1;//字体大小索引private int sizeIndex -1;//字体颜色索引private int colorIndex -1;//字体风格索引private int styleIndex -1;public int getFamilyIndex() {return familyIndex;}public int getSizeIndex() {return sizeIndex;}public int getColorIndex() {return colorIndex;}public int getStyleIndex() {return styleIndex;}public void setFamilyIndex(int familyIndex) {this.familyIndex familyIndex;}public void setSizeIndex(int sizeIndex) {this.sizeIndex sizeIndex;}public void setColorIndex(int colorIndex) {this.colorIndex colorIndex;}public void setStyleIndex(int styleIndex) {this.styleIndex styleIndex;}Overridepublic String toString() {return familyIndex sizeIndex styleIndex colorIndex \n font color; }} View Code (2).字体选择器 public class JFontChooser extends JPanel {//定义变量private String current_fontName 宋体;//当前的字体名称,默认宋体.private int current_fontStyle Font.PLAIN;//当前的字样,默认常规.private int current_fontSize 9;//当前字体大小,默认9号.private Color current_color Color.BLACK;//当前字色,默认黑色.private Component parent;//弹出dialog的父窗体.private JDialog dialog;//用于显示模态的窗体private MyFont myfont;//带有Color的字体.private JLabel lblFont;//选择字体的LBLprivate JLabel lblStyle;//选择字型的LBLprivate JLabel lblSize;//选择字大小的LBLprivate JLabel lblColor;//选择Color的labelprivate JTextField txtFont;//显示选择字体的TEXTprivate JTextField txtStyle;//显示选择字型的TEXTprivate JTextField txtSize;//显示选择字大小的TEXTprivate JList lstFont;//选择字体的列表.private JList lstStyle;//选择字型的列表.private JList lstSize;//选择字体大小的列表.private JComboBox cbColor;//选择Color的下拉框.private JButton ok, cancel;//确定,取消按钮.private JScrollPane spFont;private JScrollPane spSize;private JLabel lblShow;//显示效果的label.private JPanel showPan;//显示框.private Map sizeMap;//字号映射表.private Map colorMap;//字着色映射表.//定义变量_结束________________public JFontChooser(MyFont curFont) {//实例化变量lblFont new JLabel(字体:);lblStyle new JLabel(字型:);lblSize new JLabel(大小:);lblColor new JLabel(颜色:);lblShow new JLabel(Sample Test!, JLabel.CENTER);txtFont new JTextField(宋体);txtStyle new JTextField(常规);txtSize new JTextField(9);//取得当前环境可用字体.GraphicsEnvironment ge GraphicsEnvironment.getLocalGraphicsEnvironment();String[] fontNames ge.getAvailableFontFamilyNames();lstFont new JList(fontNames);//字形.lstStyle new JList(new String[]{常规, 斜休, 粗休, 粗斜休});//字号.String[] sizeStr new String[]{8, 9, 10, 11, 12, 14, 16, 18, 20, 22, 24, 26, 28, 36, 48, 72,初号, 小初, 一号, 小一, 二号, 小二, 三号, 小三, 四号, 小四, 五号, 小五, 六号, 小六, 七号, 八号};int sizeVal[] {8, 9, 10, 11, 12, 14, 16, 18, 20, 22, 24, 26, 28, 36, 48, 72, 42, 36, 26, 24, 22, 18, 16, 15, 14, 12, 11, 9, 8, 7, 6, 5};sizeMap new HashMap();for (int i 0; i sizeStr.length; i) {sizeMap.put(sizeStr[i], sizeVal[i]);}lstSize new JList(sizeStr);spFont new JScrollPane(lstFont);spSize new JScrollPane(lstSize);String[] colorStr new String[]{黑色, 蓝色, 深灰, 灰色, 绿色, 浅灰, 洋红, 桔黄, 粉红, 红色, 白色, 黄色};Color[] colorVal new Color[]{Color.BLACK, Color.BLUE, Color.DARK_GRAY, Color.GRAY, Color.GREEN, Color.LIGHT_GRAY, Color.MAGENTA, Color.ORANGE, Color.PINK, Color.RED, Color.WHITE, Color.YELLOW};colorMap new HashMap();for (int i 0; i colorStr.length; i) {colorMap.put(colorStr[i], colorVal[i]);}cbColor new JComboBox(colorStr);showPan new JPanel();ok new JButton(确定);cancel new JButton(取消);//实例化变量_结束//布局控件this.setLayout(null);//不用布局管理器. add(lblFont);lblFont.setBounds(12, 10, 30, 20);txtFont.setEditable(false);add(txtFont);txtFont.setBounds(10, 30, 155, 20);add(spFont);spFont.setBounds(10, 50, 155, 100);add(lblStyle);lblStyle.setBounds(175, 10, 30, 20);txtStyle.setEditable(false);add(txtStyle);txtStyle.setBounds(175, 30, 130, 20);lstStyle.setBorder(javax.swing.BorderFactory.createLineBorder(Color.gray));add(lstStyle);lstStyle.setBounds(175, 50, 130, 100);add(lblSize);lblSize.setBounds(320, 10, 30, 20);txtSize.setEditable(false);add(txtSize);txtSize.setBounds(320, 30, 60, 20);add(spSize);spSize.setBounds(320, 50, 60, 100);add(lblColor);lblColor.setBounds(13, 170, 30, 20);add(cbColor);cbColor.setBounds(10, 195, 130, 22);cbColor.setMaximumRowCount(5);showPan.setBorder(javax.swing.BorderFactory.createTitledBorder(示例));add(showPan);showPan.setBounds(150, 170, 230, 100);showPan.setLayout(new BorderLayout());lblShow.setBackground(Color.white);showPan.add(lblShow);add(ok);ok.setBounds(10, 240, 60, 20);add(cancel);cancel.setBounds(80, 240, 60, 20);//布局控件_结束//事件lstFont.addListSelectionListener(new ListSelectionListener() {public void valueChanged(ListSelectionEvent e) {current_fontName (String) lstFont.getSelectedValue();txtFont.setText(current_fontName);lblShow.setFont(new Font(current_fontName, current_fontStyle, current_fontSize));}});lstStyle.addListSelectionListener(new ListSelectionListener() {public void valueChanged(ListSelectionEvent e) {String value (String) ((JList) e.getSource()).getSelectedValue();if (value.equals(常规)) {current_fontStyle Font.PLAIN;}if (value.equals(斜休)) {current_fontStyle Font.ITALIC;}if (value.equals(粗休)) {current_fontStyle Font.BOLD;}if (value.equals(粗斜休)) {current_fontStyle Font.BOLD | Font.ITALIC;}txtStyle.setText(value);lblShow.setFont(new Font(current_fontName, current_fontStyle, current_fontSize));}});lstSize.addListSelectionListener(new ListSelectionListener() {public void valueChanged(ListSelectionEvent e) {current_fontSize (Integer) sizeMap.get(lstSize.getSelectedValue());txtSize.setText(String.valueOf(current_fontSize));lblShow.setFont(new Font(current_fontName, current_fontStyle, current_fontSize));}});cbColor.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {current_color (Color) colorMap.get(cbColor.getSelectedItem());lblShow.setForeground(current_color);}});ok.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {myfont new MyFont();myfont.setFont(new Font(current_fontName, current_fontStyle, current_fontSize));myfont.setColor(current_color);myfont.setColorIndex(cbColor.getSelectedIndex());myfont.setFamilyIndex(lstFont.getSelectedIndex());myfont.setSizeIndex(lstSize.getSelectedIndex());myfont.setStyleIndex(lstStyle.getSelectedIndex());dialog.dispose();dialog null;}});cancel.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {myfont null;dialog.dispose();dialog null;}});//事件_结束if(curFont ! null){if(curFont.getFamilyIndex() ! -1) {lstFont.setSelectedIndex(curFont.getFamilyIndex());lstFont.ensureIndexIsVisible(curFont.getFamilyIndex());} else {lstFont.setSelectedValue(宋体, true);}lstSize.setSelectedIndex(curFont.getSizeIndex());lstSize.ensureIndexIsVisible(curFont.getSizeIndex());lstStyle.setSelectedIndex(curFont.getStyleIndex());lstStyle.ensureIndexIsVisible(curFont.getStyleIndex());cbColor.setSelectedIndex(curFont.getColorIndex());}}public MyFont showDialog(Frame parent, String title, int dx, int dy) {if(title null)title Font;dialog new JDialog(parent, title,true);dialog.add(this);dialog.setResizable(false);dialog.setBounds(dx, dy, 400, 310);dialog.addWindowListener(new WindowAdapter() {Overridepublic void windowClosing(WindowEvent e) {myfont null;dialog.removeAll();dialog.dispose();dialog null;}});dialog.setVisible(true);return myfont;}
} View Code 2.编辑器的实现 (1).字符串样式修饰类 功能主要是将JTextPane对应的Document的文本进行处理。使得不同类型的文本显示为不同的风格样式。由于这个编辑器是用来编辑java语言的所以会对java中的关键字进行特殊的显示使得关键字注释以及其他串的不同的显示。 class DecorateKeyWords{//java中的关键字private static final String KEYWORDS[]{abstract,assert,boolen,break,byte,case,catch,char,class,const, continue,default,do,double,else,enum,extends,final,finally,float,for, if,implements,import,instanceof,int,interface,long,native,new,package, private,protected,public,return,short,static,strictfp,super,switch,synchrpnized, this,throw,throws,transient,try,void,volatile,while}; // 准备关键字 private static HashSetString keywords new HashSetString(); public static void decorateStyleConstants(SimpleAttributeSet attr, Font font){StyleConstants.setFontFamily(attr, font.getFamily());StyleConstants.setFontSize(attr, font.getSize());switch(font.getStyle()) {case Font.BOLD :StyleConstants.setBold(attr, true);break;case Font.ITALIC :StyleConstants.setItalic(attr, true);break;case Font.PLAIN :StyleConstants.setItalic(attr, false);StyleConstants.setBold(attr, false);break;case Font.BOLD | Font.ITALIC :StyleConstants.setItalic(attr, true);StyleConstants.setBold(attr, true);break;default :break;}}public static void decorateKeyWords(JTextPane tp, MyFont myFont) { //初始化关键字for(int i 0; iKEYWORDS.length; i) keywords.add(KEYWORDS[i]);// 对所有关键词进行修饰颜色 String text tp.getText().replaceAll(\\r, ); StyledDocument doc tp.getStyledDocument(); SimpleAttributeSet keyWordAttr new SimpleAttributeSet(); StyleConstants.setForeground(keyWordAttr, Color.cyan);decorateStyleConstants(keyWordAttr, myFont.getFont());SimpleAttributeSet otherWordAttr new SimpleAttributeSet(); StyleConstants.setForeground(otherWordAttr, myFont.getColor());decorateStyleConstants(otherWordAttr, myFont.getFont());ListIteratorWordNode iterator1 split(text, \\s|\\{|\\}|\\(|\\)|\\|\\|\\.|\\n); while (iterator1.hasNext()) { WordNode wn iterator1.next(); if (keywords.contains(wn.getWord())) { doc.setCharacterAttributes(wn.getLocation(), wn.getWord().length(), keyWordAttr, true); } else {doc.setCharacterAttributes(wn.getLocation(), wn.getWord().length(), otherWordAttr, true);}} // 对注释行进行修饰不同的颜色 SimpleAttributeSet annotationAttr new SimpleAttributeSet(); StyleConstants.setForeground(annotationAttr, Color.green); decorateStyleConstants(annotationAttr, myFont.getFont());ListIteratorWordNode iterator2 split(text, \\n); boolean exegesis false; // 是否加了/*的注释 while (iterator2.hasNext()) { WordNode wn iterator2.next(); if (wn.getWord().startsWith(//)) { doc.setCharacterAttributes(wn.getLocation(), wn.getWord() .length(), annotationAttr, true); } else if (wn.getWord().startsWith(/*) wn.getWord().endsWith(*/)) { doc.setCharacterAttributes(wn.getLocation(), wn.getWord() .length(), annotationAttr, true); } else if (wn.getWord().startsWith(/*) !wn.getWord().endsWith(*/)) { exegesis true; doc.setCharacterAttributes(wn.getLocation(), wn.getWord() .length(), annotationAttr, true); } else if (!wn.getWord().startsWith(/*) wn.getWord().endsWith(*/) true exegesis) { doc.setCharacterAttributes(wn.getLocation(), wn.getWord() .length(), annotationAttr, true); exegesis false; } else if (true exegesis) { doc.setCharacterAttributes(wn.getLocation(), wn.getWord() .length(), annotationAttr, true); } } } /** * 按照指定的多个字符进行字符串分割如‘ ’或‘,’等 * param str * 被分割的字符串 * param regexs * 要分割所需的符号 * return 包含WordNodeList对象的iterator */ private static ListIteratorWordNode split(String str,String regex) { Pattern p Pattern.compile(regex); Matcher m p.matcher(str); ListWordNode nodeList new ArrayList(); int strStart 0; // 分割单词的首位置 String s; // 分割的单词 WordNode wn; // StringNode节点 while (m.find()) { s str.substring(strStart, m.start()); if (!s.equals(new String())) { wn new WordNode(strStart, s); nodeList.add(wn); } strStart m.start() 1; } s str.substring(strStart, str.length()); wn new WordNode(strStart, s); nodeList.add(wn); return nodeList.listIterator(); }
} View Code (2).串节点 功能通过正则表达式将JTextPane对应的Document的文本进行分割记录每个分割串的起始位置然后通过字符串修饰类(DecorateKeyWords)中的decorateStyleConstants方法根据每个分割串的起始位置对JTextPane对应的Document的文本进行不同风格样式的修饰。 class WordNode { private int location; private String word; public WordNode(int location, String str) { super(); this.location location; this.word str; } public int getLocation() { return location; } public String getWord() { return word; }
} View Code (3).编辑器类 功能文件的新建文件的保存文件的编辑确定JTextPane中光标的位置行号和列号显示行号字体样式的选择重新设置新字体样式。 通过DocumentListener可以监听文档的改变删除和插入的时候调用字体选择器对文档的内容重新设置样式另外在文档删除的时候判断是否行数减少如果是则更新行号面板的显示。 textPane.getDocument().addDocumentListener(new DocumentListener() {Overridepublic void changedUpdate(DocumentEvent e) {}Overridepublic void insertUpdate(final DocumentEvent e) {new Thread(new Runnable() {Overridepublic void run() {DecorateKeyWords.decorateKeyWords(textPane, myFont);}}).start();}Overridepublic void removeUpdate(DocumentEvent e) {new Thread(new Runnable() { Overridepublic void run() {String text;try {text textPane.getDocument().getText(0, textPane.getDocument().getLength()).replaceAll(\\r, );Pattern pattern Pattern.compile(\\n);Matcher matcher pattern.matcher(text);int lineRow 1;while(matcher.find()){//计算行数lineRow;}while(lineRow linePane.getComponentCount()) {--lineNum;linePane.remove(linePane.getComponentCount()-1);}linePane.updateUI();} catch (BadLocationException ex) {ex.printStackTrace();} finally {DecorateKeyWords.decorateKeyWords(textPane, myFont);}}}).start();}
} 通过CaretListener可以监听光标位置的变化实时获得光标所在的行号和列号并显示出来。 textPane.addCaretListener(new CaretListener() {Overridepublic void caretUpdate(CaretEvent e) {try {String text textPane.getDocument().getText(0, e.getDot()).replaceAll(\\r, );Pattern pattern Pattern.compile(\\n);Matcher matcher pattern.matcher(text);int lineRow 1;int lastLineBeginPos -1;//记录文本中最后一行的开始的位置 while(matcher.find()){//计算行数lineRow;lastLineBeginPos matcher.start();//得到下一行光标所在的位置根据上一行的换行符}int lineCol e.getDot() - lastLineBeginPos;//显示行号和列号caretStatusBar.setText(光标 lineRow : lineCol);} catch (BadLocationException ey) {ey.printStackTrace();}}}); 通过KeyListener可以监听按键的操作如果是回车键那么为行号面板增加新的行号 textPane.addKeyListener(new KeyAdapter() {Overridepublic void keyPressed(KeyEvent e) {super.keyPressed(e);if(e.getKeyCode() KeyEvent.VK_ENTER) {//添加新的行号addLineNum();}}}); 编辑器全部代码如下 public class EditorDemo extends JFrame {public static final String MAX_LINE_NUM 9999;private JTextPane textPane new JTextPane(); //文本窗格编辑窗口private JLabel timeStatusBar new JLabel(); //时间状态栏private JLabel caretStatusBar new JLabel(); //光标位置状态栏private JFileChooser filechooser new JFileChooser(); //文件选择器private JPanel linePane new JPanel(new FlowLayout(FlowLayout.CENTER, 0, 0));private int lineNum 0;private MyFont myFont null;private void initTextPaneDocument(){textPane.getDocument().addDocumentListener(new DocumentListener() {Overridepublic void changedUpdate(DocumentEvent e) {}Overridepublic void insertUpdate(final DocumentEvent e) {new Thread(new Runnable() {Overridepublic void run() {DecorateKeyWords.decorateKeyWords(textPane, myFont);}}).start();}Overridepublic void removeUpdate(DocumentEvent e) {new Thread(new Runnable() { Overridepublic void run() {String text;try {text textPane.getDocument().getText(0, textPane.getDocument().getLength()).replaceAll(\\r, );Pattern pattern Pattern.compile(\\n);Matcher matcher pattern.matcher(text);int lineRow 1;while(matcher.find()){//计算行数lineRow;}while(lineRow linePane.getComponentCount()) {--lineNum;linePane.remove(linePane.getComponentCount()-1);}linePane.updateUI();} catch (BadLocationException ex) {ex.printStackTrace();} finally {DecorateKeyWords.decorateKeyWords(textPane, myFont);}}}).start();}});}public EditorDemo() { //构造函数super(简单的文本编辑器); //调用父类构造函数//初始字体myFont new MyFont();myFont.setColor(Color.black);myFont.setFont(new Font(宋体, Font.PLAIN, 24));myFont.setSizeIndex(19);myFont.setStyleIndex(0);myFont.setColorIndex(0);Action[] actions //Action数组,各种操作命令{new NewAction(),new OpenAction(),new SaveAction(),new CutAction(),new CopyAction(),new PasteAction(),new NewFontStyle(),new AboutAction(),new ExitAction()};textPane.addKeyListener(new KeyAdapter() {Overridepublic void keyPressed(KeyEvent e) {super.keyPressed(e);if(e.getKeyCode() KeyEvent.VK_ENTER) {//添加新的行号addLineNum();}}});textPane.addCaretListener(new CaretListener() {Overridepublic void caretUpdate(CaretEvent e) {try {String text textPane.getDocument().getText(0, e.getDot()).replaceAll(\\r, );Pattern pattern Pattern.compile(\\n);Matcher matcher pattern.matcher(text);int lineRow 1;int lastLineBeginPos -1;//记录文本中最后一行的开始的位置 while(matcher.find()){//计算行数lineRow;lastLineBeginPos matcher.start();//得到下一行光标所在的位置根据上一行的换行符}int lineCol e.getDot() - lastLineBeginPos;//显示行号和列号caretStatusBar.setText(光标 lineRow : lineCol);} catch (BadLocationException ey) {ey.printStackTrace();}}});initTextPaneDocument();setJMenuBar(createJMenuBar(actions)); //设置菜单栏add(createJToolBar(actions), BorderLayout.NORTH); //增加工具栏JPanel textBackPanel new JPanel(new BorderLayout());textBackPanel.add(linePane, BorderLayout.WEST);//增加行号面板textBackPanel.add(textPane, BorderLayout.CENTER);//增加文本面板add(new JScrollPane(textBackPanel), BorderLayout.CENTER); //文本窗格嵌入到JscrollPaneJPanel statusPane new JPanel(new FlowLayout(FlowLayout.LEFT, 50, 0));statusPane.add(caretStatusBar);statusPane.add(timeStatusBar);//初始化光标位置caretStatusBar.setText(光标 1 : 1);//初始化系统时间显示new Timer().schedule(new TimerTask() {Overridepublic void run() {Date now new Date(); SimpleDateFormat dateFormat new SimpleDateFormat(yyyy-MM-dd HH:mm:ss);//可以方便地修改日期格式timeStatusBar.setText(dateFormat.format(now)); }}, 0, 1000);add(statusPane, BorderLayout.SOUTH); //增加状态栏FontMetrics fm FontDesignMetrics.getMetrics(myFont.getFont());//设置光标的大小textPane.setFont(myFont.getFont());//设置行数面板的宽度linePane.setPreferredSize(new Dimension(fm.stringWidth(MAX_LINE_NUM), 0));addLineNum();setBounds(200, 100, 800, 500); //设置窗口尺寸setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //关闭窗口时退出程序setVisible(true); //设置窗口可视}private void addLineNum(){//为textPane添加行号String numText String.valueOf(lineNum);int tmpNum MAX_LINE_NUM.length() - (int)(Math.log10(lineNum*1.0)1);String spaces ;while(tmpNum 0){spaces ;--tmpNum;}JLabel lineLabel new JLabel(numText.replaceAll((\\d), spaces$1), JLabel.RIGHT);lineLabel.setForeground(Color.GRAY);lineLabel.setFont(myFont.getFont());linePane.add(lineLabel);linePane.updateUI();}private JMenuBar createJMenuBar(Action[] actions) { //创建菜单栏JMenuBar menubar new JMenuBar(); //实例化菜单栏JMenu menuFile new JMenu(文件); //实例化菜单JMenu menuEdit new JMenu(编辑);JMenu menuAbout new JMenu(帮助);menuFile.add(new JMenuItem(actions[0])); //增加新菜单项menuFile.add(new JMenuItem(actions[1]));menuFile.add(new JMenuItem(actions[2]));menuFile.add(new JMenuItem(actions[7]));menuEdit.add(new JMenuItem(actions[3]));menuEdit.add(new JMenuItem(actions[4]));menuEdit.add(new JMenuItem(actions[5]));menuAbout.add(new JMenuItem(actions[6]));menubar.add(menuFile); //增加菜单menubar.add(menuEdit);menubar.add(menuAbout);return menubar; //返回菜单栏}private JToolBar createJToolBar(Action[] actions) { //创建工具条JToolBar toolBar new JToolBar(); //实例化工具条for (int i 0; i actions.length; i) {JButton bt new JButton(actions[i]); //实例化新的按钮bt.setRequestFocusEnabled(false); //设置不需要焦点toolBar.add(bt); //增加按钮到工具栏}return toolBar; //返回工具栏}class NewFontStyle extends AbstractAction{public NewFontStyle() {super(字体);}Overridepublic void actionPerformed(ActionEvent e) {JFontChooser one new JFontChooser(myFont);MyFont tmpFont one.showDialog(null, 字体选择器, textPane.getLocationOnScreen().x, textPane.getLocationOnScreen().y); if(tmpFont null) return;myFont tmpFont;//重新设置 textPane的字体改变光标的大小textPane.setFont(myFont.getFont());FontMetrics fm FontDesignMetrics.getMetrics(myFont.getFont());//重新设置数字行数面板的宽度linePane.setPreferredSize(new Dimension(fm.stringWidth(MAX_LINE_NUM), 0));//重新设置行号的字体for(int i0; i linePane.getComponentCount(); i)linePane.getComponent(i).setFont(myFont.getFont());StyledDocument doc textPane.getStyledDocument(); SimpleAttributeSet wordAttr new SimpleAttributeSet(); DecorateKeyWords.decorateStyleConstants(wordAttr, myFont.getFont());doc.setCharacterAttributes(0, doc.getLength(), wordAttr, false);}}class NewAction extends AbstractAction { //新建文件命令public NewAction() {super(新建);}public void actionPerformed(ActionEvent e) {textPane.setDocument(new DefaultStyledDocument()); //清空文档while(linePane.getComponentCount() 1)linePane.remove(linePane.getComponent(linePane.getComponentCount()-1));linePane.updateUI();lineNum 1;initTextPaneDocument();}}class OpenAction extends AbstractAction { //打开文件命令public OpenAction() {super(打开);}public void actionPerformed(ActionEvent e) {int i filechooser.showOpenDialog(EditorDemo.this); //显示打开文件对话框if (i JFileChooser.APPROVE_OPTION) { //点击对话框中打开选项File f filechooser.getSelectedFile(); //得到选择的文件try {InputStream is new FileInputStream(f); //得到文件输入流textPane.read(is, d); //读入文件到文本窗格is.close();is new FileInputStream(f);LineNumberReader lnr new LineNumberReader(new InputStreamReader(is));lnr.skip(Long.MAX_VALUE);int newLineNum lnr.getLineNumber()1;lnr.close();if(lineNum newLineNum){while(lineNum newLineNum)addLineNum();} else {while(lineNum newLineNum lineNum 1){linePane.remove(linePane.getComponentCount()-1);--lineNum;}linePane.updateUI();}} catch (Exception ex) {ex.printStackTrace(); //输出出错信息}}DecorateKeyWords.decorateKeyWords(textPane, myFont);initTextPaneDocument();}}class SaveAction extends AbstractAction { //保存命令public SaveAction() {super(保存);}public void actionPerformed(ActionEvent e) {int i filechooser.showSaveDialog(EditorDemo.this); //显示保存文件对话框if (i JFileChooser.APPROVE_OPTION) { //点击对话框中保存按钮File f filechooser.getSelectedFile(); //得到选择的文件try {FileOutputStream out new FileOutputStream(f); //得到文件输出流out.write(textPane.getText().getBytes()); //写出文件 } catch (Exception ex) {ex.printStackTrace(); //输出出错信息}}}}class ExitAction extends AbstractAction { //退出命令public ExitAction() {super(退出);}public void actionPerformed(ActionEvent e) {System.exit(0); //退出程序}}class CutAction extends AbstractAction { //剪切命令public CutAction() {super(剪切);}public void actionPerformed(ActionEvent e) {textPane.cut(); //调用文本窗格的剪切命令}}class CopyAction extends AbstractAction { //拷贝命令public CopyAction() {super(拷贝);}public void actionPerformed(ActionEvent e) {textPane.copy(); //调用文本窗格的拷贝命令}}class PasteAction extends AbstractAction { //粘贴命令public PasteAction() {super(粘贴);}public void actionPerformed(ActionEvent e) {textPane.paste(); //调用文本窗格的粘贴命令}}class AboutAction extends AbstractAction { //关于选项命令public AboutAction() {super(关于);}public void actionPerformed(ActionEvent e) {JOptionPane.showMessageDialog(EditorDemo.this, 简单的文本编辑器演示); //显示软件信息}}public static void main(String[] args) {new EditorDemo();}
} View Code 转载于:https://www.cnblogs.com/hujunzheng/p/5232125.html
