javax.swing.text.html.HTMLEditorKit Java Exaples

Source File: bug8058120.java From jdk8u-jdk with GNU General Public License v2.0

6 votes

private static void createAndShowGUI() {
    try {
        UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
    } catch (Exception ex) {
        throw new RuntimeException(ex);
    }

    JFrame frame = new JFrame("bug8058120");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JEditorPane editorPane = new JEditorPane();
    editorPane.setContentType("text/html");
    editorPane.setEditorKit(new HTMLEditorKit());

    document = (HTMLDocument) editorPane.getDocument();

    editorPane.setText(text);

    frame.add(editorPane);
    frame.setSize(200, 200);
    frame.setVisible(true);
}

Source File: FSwingHtml.java From pra with MIT License

6 votes

public static HTMLDocument loadHtml(BufferedReader br){
//String html){//
	try {
		HTMLEditorKit kit = new HTMLEditorKit();
		HTMLDocument doc = (HTMLDocument)kit.createDefaultDocument();
		doc.putProperty("IgnoreCharsetDirective"
				,Boolean.TRUE);//, new Boolean(true));

		kit.read(br,   doc,   0);  
	  br.close();
	  return doc;
	} catch (Exception e) {
		e.printStackTrace();
	}
	return null;		
}

Source File: bug8015853.java From dragonwell8_jdk with GNU General Public License v2.0

6 votes

private static void createAndShowGUI() {
    try {
        UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
    } catch (Exception ex) {
        throw new RuntimeException(ex);
    }
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JEditorPane editorPane = new JEditorPane();
    HTMLEditorKit editorKit = new HTMLEditorKit();
    editorPane.setEditorKit(editorKit);
    editorPane.setText(text);

    frame.add(editorPane);
    frame.setVisible(true);
}

Source File: DodsURLExtractor.java From netcdf-java with BSD 3-Clause "New" or "Revised" License

6 votes

/**
 * Extract all A-HREF contained URLS from the given URL and return in List
 */
public ArrayList extract(String url) throws IOException {
  if (debug)
    System.out.println(" URLextract=" + url);

  baseURL = new URL(url);
  InputStream in = baseURL.openStream();
  InputStreamReader r = new InputStreamReader(filterTag(in), CDM.UTF8);
  HTMLEditorKit.ParserCallback callback = new CallerBacker();

  urlList = new ArrayList();
  wantURLS = true;
  wantText = false;
  parser.parse(r, callback, false);

  return urlList;
}

Source File: Test6933784.java From hottub with GNU General Public License v2.0

6 votes

private static void checkImages() throws Exception {
    SwingUtilities.invokeAndWait(new Runnable() {
        public void run() {
            HTMLEditorKit c = new HTMLEditorKit();
            HTMLDocument doc = new HTMLDocument();

            try {
                c.read(new StringReader("<HTML><TITLE>Test</TITLE><BODY><IMG id=test></BODY></HTML>"), doc, 0);
            } catch (Exception e) {
                throw new RuntimeException("The test failed", e);
            }

            Element elem = doc.getElement("test");
            ImageView iv = new ImageView(elem);

            if (iv.getLoadingImageIcon() == null) {
                throw new RuntimeException("getLoadingImageIcon returns null");
            }

            if (iv.getNoImageIcon() == null) {
                throw new RuntimeException("getNoImageIcon returns null");
            }
        }
    });
}

Source File: bug8028616.java From openjdk-jdk8u-backup with GNU General Public License v2.0

6 votes

public static void main(String[] args) throws Exception {
    ParserCB cb = new ParserCB();
    HTMLEditorKit htmlKit = new HTMLEditorKit();
    HTMLDocument htmlDoc = (HTMLDocument) htmlKit.createDefaultDocument();

    htmlDoc.getParser().parse(new StringReader(text), cb, true);

    synchronized (lock) {
        if (!isCallbackInvoked) {
            lock.wait(5000);
        }
    }

    if (!isCallbackInvoked) {
        throw new RuntimeException("Test Failed: ParserCallback.handleText() is not invoked for text - " + text);
    }

    if (exception != null) {
        throw exception;
    }
}

Source File: HtmlSelection.java From Ic2ExpReactorPlanner with GNU General Public License v2.0

6 votes

private static String convertToRTF(final String htmlStr) {

        OutputStream os = new ByteArrayOutputStream();
        HTMLEditorKit htmlEditorKit = new HTMLEditorKit();
        RTFEditorKit rtfEditorKit = new RTFEditorKit();
        String rtfStr = null;

        String tempStr = htmlStr.replace("</font>", "#END_FONT#").replace("<br>", "#NEW_LINE#");
        InputStream is = new ByteArrayInputStream(tempStr.getBytes());
        try {
            Document doc = htmlEditorKit.createDefaultDocument();
            htmlEditorKit.read(is, doc, 0);
            rtfEditorKit.write(os, doc, 0, doc.getLength());
            rtfStr = os.toString();
            rtfStr = rtfStr.replace("#NEW_LINE#", "\\line ");
            rtfStr = rtfStr.replace("#END_FONT#", "\\cf0 ");
        } catch (IOException | BadLocationException e) {
            e.printStackTrace();
        }
        return rtfStr;
    }

Source File: bug8014863.java From jdk8u-dev-jdk with GNU General Public License v2.0

6 votes

private static void createAndShowGUI(String text) throws Exception {
    SwingUtilities.invokeAndWait(new Runnable() {
        public void run() {
            try {
                UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
            } catch (Exception ex) {
                throw new RuntimeException(ex);
            }
            frame = new JFrame();
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

            editorPane = new JEditorPane();
            HTMLEditorKit editorKit = new HTMLEditorKit();
            editorPane.setEditorKit(editorKit);
            editorPane.setText(text);
            editorPane.setCaretPosition(1);

            frame.add(editorPane);
            frame.setSize(200, 200);
            frame.setVisible(true);
        }
    });
}

Source File: bug8028616.java From jdk8u-dev-jdk with GNU General Public License v2.0

6 votes

public static void main(String[] args) throws Exception {
    ParserCB cb = new ParserCB();
    HTMLEditorKit htmlKit = new HTMLEditorKit();
    HTMLDocument htmlDoc = (HTMLDocument) htmlKit.createDefaultDocument();

    htmlDoc.getParser().parse(new StringReader(text), cb, true);

    synchronized (lock) {
        if (!isCallbackInvoked) {
            lock.wait(5000);
        }
    }

    if (!isCallbackInvoked) {
        throw new RuntimeException("Test Failed: ParserCallback.handleText() is not invoked for text - " + text);
    }

    if (exception != null) {
        throw exception;
    }
}

Source File: bug8005391.java From dragonwell8_jdk with GNU General Public License v2.0

6 votes

public static void main(String[] args) throws Exception {
    int N = 10;

    for (int i = 0; i < N; i++) {
        HTMLEditorKit kit = new HTMLEditorKit();
        Class c = Class.forName("javax.swing.text.html.parser.ParserDelegator");
        HTMLEditorKit.Parser parser = (HTMLEditorKit.Parser) c.newInstance();
        HTMLDocument doc = (HTMLDocument) kit.createDefaultDocument();
        HTMLEditorKit.ParserCallback htmlReader = doc.getReader(0);
        parser.parse(new CharArrayReader(htmlDoc.toCharArray()), htmlReader, true);
        htmlReader.flush();
        CharArrayWriter writer = new CharArrayWriter(1000);
        kit.write(writer, doc, 0, doc.getLength());
        writer.flush();

        String result = writer.toString();
        if (!result.contains("<tt><a")) {
            throw new RuntimeException("The <a> and <tt> tags are swapped");
        }
    }
}

Source File: Test6933784.java From openjdk-jdk8u with GNU General Public License v2.0

6 votes

private static void checkImages() throws Exception {
    SwingUtilities.invokeAndWait(new Runnable() {
        public void run() {
            HTMLEditorKit c = new HTMLEditorKit();
            HTMLDocument doc = new HTMLDocument();

            try {
                c.read(new StringReader("<HTML><TITLE>Test</TITLE><BODY><IMG id=test></BODY></HTML>"), doc, 0);
            } catch (Exception e) {
                throw new RuntimeException("The test failed", e);
            }

            Element elem = doc.getElement("test");
            ImageView iv = new ImageView(elem);

            if (iv.getLoadingImageIcon() == null) {
                throw new RuntimeException("getLoadingImageIcon returns null");
            }

            if (iv.getNoImageIcon() == null) {
                throw new RuntimeException("getNoImageIcon returns null");
            }
        }
    });
}

Source File: bug8058120.java From openjdk-jdk8u-backup with GNU General Public License v2.0

6 votes

private static void createAndShowGUI() {
    try {
        UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
    } catch (Exception ex) {
        throw new RuntimeException(ex);
    }

    JFrame frame = new JFrame("bug8058120");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JEditorPane editorPane = new JEditorPane();
    editorPane.setContentType("text/html");
    editorPane.setEditorKit(new HTMLEditorKit());

    document = (HTMLDocument) editorPane.getDocument();

    editorPane.setText(text);

    frame.add(editorPane);
    frame.setSize(200, 200);
    frame.setVisible(true);
}

Source File: bug8028616.java From jdk8u-jdk with GNU General Public License v2.0

6 votes

public static void main(String[] args) throws Exception {
    ParserCB cb = new ParserCB();
    HTMLEditorKit htmlKit = new HTMLEditorKit();
    HTMLDocument htmlDoc = (HTMLDocument) htmlKit.createDefaultDocument();

    htmlDoc.getParser().parse(new StringReader(text), cb, true);

    synchronized (lock) {
        if (!isCallbackInvoked) {
            lock.wait(5000);
        }
    }

    if (!isCallbackInvoked) {
        throw new RuntimeException("Test Failed: ParserCallback.handleText() is not invoked for text - " + text);
    }

    if (exception != null) {
        throw exception;
    }
}

Source File: bug8005391.java From jdk8u-jdk with GNU General Public License v2.0

6 votes

public static void main(String[] args) throws Exception {
    int N = 10;

    for (int i = 0; i < N; i++) {
        HTMLEditorKit kit = new HTMLEditorKit();
        Class c = Class.forName("javax.swing.text.html.parser.ParserDelegator");
        HTMLEditorKit.Parser parser = (HTMLEditorKit.Parser) c.newInstance();
        HTMLDocument doc = (HTMLDocument) kit.createDefaultDocument();
        HTMLEditorKit.ParserCallback htmlReader = doc.getReader(0);
        parser.parse(new CharArrayReader(htmlDoc.toCharArray()), htmlReader, true);
        htmlReader.flush();
        CharArrayWriter writer = new CharArrayWriter(1000);
        kit.write(writer, doc, 0, doc.getLength());
        writer.flush();

        String result = writer.toString();
        if (!result.contains("<tt><a")) {
            throw new RuntimeException("The <a> and <tt> tags are swapped");
        }
    }
}

Source File: Test6933784.java From jdk8u-dev-jdk with GNU General Public License v2.0

6 votes

private static void checkImages() throws Exception {
    SwingUtilities.invokeAndWait(new Runnable() {
        public void run() {
            HTMLEditorKit c = new HTMLEditorKit();
            HTMLDocument doc = new HTMLDocument();

            try {
                c.read(new StringReader("<HTML><TITLE>Test</TITLE><BODY><IMG id=test></BODY></HTML>"), doc, 0);
            } catch (Exception e) {
                throw new RuntimeException("The test failed", e);
            }

            Element elem = doc.getElement("test");
            ImageView iv = new ImageView(elem);

            if (iv.getLoadingImageIcon() == null) {
                throw new RuntimeException("getLoadingImageIcon returns null");
            }

            if (iv.getNoImageIcon() == null) {
                throw new RuntimeException("getNoImageIcon returns null");
            }
        }
    });
}

Source File: bug8014863.java From TencentKona-8 with GNU General Public License v2.0

6 votes

private static void createAndShowGUI(String text) throws Exception {
    SwingUtilities.invokeAndWait(new Runnable() {
        public void run() {
            try {
                UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
            } catch (Exception ex) {
                throw new RuntimeException(ex);
            }
            frame = new JFrame();
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

            editorPane = new JEditorPane();
            HTMLEditorKit editorKit = new HTMLEditorKit();
            editorPane.setEditorKit(editorKit);
            editorPane.setText(text);
            editorPane.setCaretPosition(1);

            frame.add(editorPane);
            frame.setSize(200, 200);
            frame.setVisible(true);
        }
    });
}

Source File: bug8015853.java From TencentKona-8 with GNU General Public License v2.0

6 votes

private static void createAndShowGUI() {
    try {
        UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
    } catch (Exception ex) {
        throw new RuntimeException(ex);
    }
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JEditorPane editorPane = new JEditorPane();
    HTMLEditorKit editorKit = new HTMLEditorKit();
    editorPane.setEditorKit(editorKit);
    editorPane.setText(text);

    frame.add(editorPane);
    frame.setVisible(true);
}

Source File: bug8015853.java From openjdk-jdk9 with GNU General Public License v2.0

6 votes

private static void createAndShowGUI() {
    try {
        UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
    } catch (Exception ex) {
        throw new RuntimeException(ex);
    }
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JEditorPane editorPane = new JEditorPane();
    HTMLEditorKit editorKit = new HTMLEditorKit();
    editorPane.setEditorKit(editorKit);
    editorPane.setText(text);

    frame.add(editorPane);
    frame.setVisible(true);
}

Source File: bug8028616.java From TencentKona-8 with GNU General Public License v2.0

6 votes

public static void main(String[] args) throws Exception {
    ParserCB cb = new ParserCB();
    HTMLEditorKit htmlKit = new HTMLEditorKit();
    HTMLDocument htmlDoc = (HTMLDocument) htmlKit.createDefaultDocument();

    htmlDoc.getParser().parse(new StringReader(text), cb, true);

    synchronized (lock) {
        if (!isCallbackInvoked) {
            lock.wait(5000);
        }
    }

    if (!isCallbackInvoked) {
        throw new RuntimeException("Test Failed: ParserCallback.handleText() is not invoked for text - " + text);
    }

    if (exception != null) {
        throw exception;
    }
}

Source File: PreviewView.java From ramus with GNU General Public License v3.0

6 votes

public PreviewView(ReportEditorView reportEditorView) {
    this.reportEditorView = reportEditorView;
    JScrollPane pane = new JScrollPane(editorPane);
    HTMLEditorKit kit = new HTMLEditorKit() {
        /**
         *
         */
        private static final long serialVersionUID = -8040272164224951314L;

        @Override
        public Document createDefaultDocument() {
            Document document = super.createDefaultDocument();
            document.putProperty("IgnoreCharsetDirective", true);
            return document;
        }
    };

    editorPane.setEditorKit(kit);
    editorPane.setEditable(false);
    this.add(pane, BorderLayout.CENTER);
}

Source File: StringUtils.java From Pydev with Eclipse Public License 1.0

6 votes

/**
 * Given some html, extracts its text.
 */
public static String extractTextFromHTML(String html) {
    try {
        EditorKit kit = new HTMLEditorKit();
        Document doc = kit.createDefaultDocument();

        // The Document class does not yet handle charset's properly.
        doc.putProperty("IgnoreCharsetDirective", Boolean.TRUE);

        // Create a reader on the HTML content.
        Reader rd = new StringReader(html);

        // Parse the HTML.
        kit.read(rd, doc, 0);

        //  The HTML text is now stored in the document
        return doc.getText(0, doc.getLength());
    } catch (Exception e) {
    }
    return "";
}

Source File: Test6933784.java From jdk8u-jdk with GNU General Public License v2.0

6 votes

private static void checkImages() throws Exception {
    SwingUtilities.invokeAndWait(new Runnable() {
        public void run() {
            HTMLEditorKit c = new HTMLEditorKit();
            HTMLDocument doc = new HTMLDocument();

            try {
                c.read(new StringReader("<HTML><TITLE>Test</TITLE><BODY><IMG id=test></BODY></HTML>"), doc, 0);
            } catch (Exception e) {
                throw new RuntimeException("The test failed", e);
            }

            Element elem = doc.getElement("test");
            ImageView iv = new ImageView(elem);

            if (iv.getLoadingImageIcon() == null) {
                throw new RuntimeException("getLoadingImageIcon returns null");
            }

            if (iv.getNoImageIcon() == null) {
                throw new RuntimeException("getNoImageIcon returns null");
            }
        }
    });
}

Source File: BrokenPlatformCustomizer.java From netbeans with Apache License 2.0

6 votes

private void postInitComponents () {
    this.jLabel2.setVisible(false);
    this.platformHome.setVisible(false);
    final Collection installFolders = platform.getInstallFolderURLs();
    if (platform.getInstallFolders().isEmpty() && installFolders.size() > 0) {
        this.jLabel2.setVisible(true);
        this.platformHome.setVisible(true);
        this.platformHome.setForeground(new Color (164,0,0));
        this.platformHome.setText (Utilities.toFile(URI.create(((URL)installFolders.iterator().next()).toExternalForm())).getAbsolutePath());
    }
    HTMLEditorKit htmlkit = new HTMLEditorKit();                
    StyleSheet css = htmlkit.getStyleSheet();
    if (css.getStyleSheets() == null) {
        StyleSheet css2 = new StyleSheet();
        Font f = jLabel2.getFont();
        css2.addRule(new StringBuffer("body { font-size: ").append(f.getSize()) // NOI18N
            .append("; font-family: ").append(f.getName()).append("; }").toString()); // NOI18N
        css2.addStyleSheet(css);
        htmlkit.setStyleSheet(css2);
    }
    jTextPane1.setEditorKit(htmlkit);        
    jTextPane1.setText(NbBundle.getMessage(BrokenPlatformCustomizer.class,"MSG_BrokenProject"));
}

Source File: HtmlCommentTagParseTest.java From openjdk-jdk9 with GNU General Public License v2.0

6 votes

public static void main(String[] args) throws IOException, InvocationTargetException, InterruptedException {
    SwingUtilities.invokeAndWait(() -> {
            MyParser cb = new MyParser();
            HTMLEditorKit htmlKit = new HTMLEditorKit();
            HTMLDocument htmlDoc = (HTMLDocument)
                    htmlKit.createDefaultDocument();
        FileReader reader = null;
        try {
            reader = new FileReader(getDirURL() + "test.html");
            htmlDoc.getParser().parse(reader, cb, true);
            if(failed) {
                throw new RuntimeException("Test failed");
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    });
}

Source File: bug8005391.java From openjdk-8-source with GNU General Public License v2.0

6 votes

public static void main(String[] args) throws Exception {
    int N = 10;

    for (int i = 0; i < N; i++) {
        HTMLEditorKit kit = new HTMLEditorKit();
        Class c = Class.forName("javax.swing.text.html.parser.ParserDelegator");
        HTMLEditorKit.Parser parser = (HTMLEditorKit.Parser) c.newInstance();
        HTMLDocument doc = (HTMLDocument) kit.createDefaultDocument();
        HTMLEditorKit.ParserCallback htmlReader = doc.getReader(0);
        parser.parse(new CharArrayReader(htmlDoc.toCharArray()), htmlReader, true);
        htmlReader.flush();
        CharArrayWriter writer = new CharArrayWriter(1000);
        kit.write(writer, doc, 0, doc.getLength());
        writer.flush();

        String result = writer.toString();
        if (!result.contains("<tt><a")) {
            throw new RuntimeException("The <a> and <tt> tags are swapped");
        }
    }
}

Source File: MainPanel.java From java-swing-tips with MIT License

6 votes

@Override public ViewFactory getViewFactory() {
  return new HTMLEditorKit.HTMLFactory() {
    @Override public View create(Element elem) {
      View view = super.create(elem);
      if (view instanceof LabelView) {
        System.out.println("debug: " + view.getAlignment(View.Y_AXIS));
      }
      AttributeSet attrs = elem.getAttributes();
      Object elementName = attrs.getAttribute(AbstractDocument.ElementNameAttribute);
      Object o = Objects.nonNull(elementName) ? null : attrs.getAttribute(StyleConstants.NameAttribute);
      if (o instanceof HTML.Tag) {
        HTML.Tag kind = (HTML.Tag) o;
        if (kind == HTML.Tag.IMG) {
          return new ImageView(elem) {
            @Override public float getAlignment(int axis) {
              // .8125f magic number...
              return axis == View.Y_AXIS ? .8125f : super.getAlignment(axis);
            }
          };
        }
      }
      return view;
    }
  };
}

Source File: Test6933784.java From jdk8u60 with GNU General Public License v2.0

6 votes

private static void checkImages() throws Exception {
    SwingUtilities.invokeAndWait(new Runnable() {
        public void run() {
            HTMLEditorKit c = new HTMLEditorKit();
            HTMLDocument doc = new HTMLDocument();

            try {
                c.read(new StringReader("<HTML><TITLE>Test</TITLE><BODY><IMG id=test></BODY></HTML>"), doc, 0);
            } catch (Exception e) {
                throw new RuntimeException("The test failed", e);
            }

            Element elem = doc.getElement("test");
            ImageView iv = new ImageView(elem);

            if (iv.getLoadingImageIcon() == null) {
                throw new RuntimeException("getLoadingImageIcon returns null");
            }

            if (iv.getNoImageIcon() == null) {
                throw new RuntimeException("getNoImageIcon returns null");
            }
        }
    });
}

Source File: IntroWindow.java From java-disassembler with GNU General Public License v3.0

6 votes

public IntroWindow() {
    this.setIconImages(Resources.iconList);
    setSize(new Dimension(800, 800));
    setType(Type.UTILITY);
    setTitle("JDA - Help");
    getContentPane().setLayout(new CardLayout(0, 0));
    this.setResizable(false);
    this.setLocationRelativeTo(null);

    JScrollPane scrollPane = new JScrollPane();
    scrollPane.setHorizontalScrollBar(null);

    getContentPane().add(scrollPane);
    editorPane = new JEditorPane();
    editorPane.setEditorKit(new HTMLEditorKit());
    editorPane.setContentType("text/html");
    editorPane.setEditable(false);
    try {
        editorPane.setText(IOUtils.toString(Resources.class.getResourceAsStream("/club/bytecode/the/jda/html/intro.html"), "UTF-8"));
    } catch (IOException e) {
        System.err.println("Couldn't load intro html:");
        e.printStackTrace();
    }
    scrollPane.setViewportView(editorPane);
}

Source File: AnalyzeAllOpenProgramsTask.java From ghidra with Apache License 2.0

6 votes

@Override
protected JPanel createTextPanel(String message) {
	if (message != null && message.toLowerCase().startsWith("<html>")) {
		JEditorPane editorPane = new JEditorPane();
		editorPane.setEditorKit(new HTMLEditorKit());
		editorPane.setName("MESSAGE-COMPONENT");
		editorPane.setText(message);

		editorPane.setBackground(new GLabel().getBackground());

		JPanel panel = new JPanel(new BorderLayout());
		panel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
		JScrollPane scrollPane = new JScrollPane(editorPane);
		scrollPane.setBorder(BorderFactory.createEmptyBorder());
		panel.add(scrollPane);
		return panel;
	}
	return super.createTextPanel(message);
}

Source File: bug7189299.java From TencentKona-8 with GNU General Public License v2.0

5 votes

private static void verifySingleDefaultButtonModelListener() {
    HTMLEditorKit htmlEditorKit = (HTMLEditorKit) html.getEditorKit();
    StyleContext.NamedStyle style = ((StyleContext.NamedStyle) htmlEditorKit
            .getInputAttributes());
    DefaultButtonModel model = ((DefaultButtonModel) style
            .getAttribute(StyleConstants.ModelAttribute));
    ActionListener[] listeners = model.getActionListeners();
    int actionListenerNum = listeners.length;
    if (actionListenerNum != 1) {
        throw new RuntimeException(
                "Expected single ActionListener object registered with "
                + "DefaultButtonModel; found " + actionListenerNum
                + " listeners registered.");
    }

    int changeListenerNum = model.getChangeListeners().length;
    if (changeListenerNum != 1) {
        throw new RuntimeException(
                "Expected at most one ChangeListener object registered "
                + "with DefaultButtonModel; found " + changeListenerNum
                + " listeners registered.");
    }
    int itemListenerNum = model.getItemListeners().length;
    if (itemListenerNum != 1) {
        throw new RuntimeException(
                "Expected at most one ItemListener object registered "
                + "with DefaultButtonModel; found " + itemListenerNum
                + " listeners registered.");
    }
}

javax.swing.text.html.HTMLEditorKit Java Examples