java - DocumentFilter を繰り返し使用する

Question

私はこのコードを実行しようとしています:

JTextPane 内の特定の単語の色を変更するには?

private final class CustomDocumentFilter extends DocumentFilter
{
        private final StyledDocument styledDocument = yourTextPane.getStyledDocument();

    private final StyleContext styleContext = StyleContext.getDefaultStyleContext();
    private final AttributeSet greenAttributeSet = styleContext.addAttribute(styleContext.getEmptySet(), StyleConstants.Foreground, Color.GREEN);
    private final AttributeSet blackAttributeSet = styleContext.addAttribute(styleContext.getEmptySet(), StyleConstants.Foreground, Color.BLACK);

// Use a regular expression to find the words you are looking for
Pattern pattern = buildPattern();

@Override
public void insertString(FilterBypass fb, int offset, String text, AttributeSet attributeSet) throws BadLocationException {
    super.insertString(fb, offset, text, attributeSet);

    handleTextChanged();
}

@Override
public void remove(FilterBypass fb, int offset, int length) throws BadLocationException {
    super.remove(fb, offset, length);

    handleTextChanged();
}

@Override
public void replace(FilterBypass fb, int offset, int length, String text, AttributeSet attributeSet) throws BadLocationException {
    super.replace(fb, offset, length, text, attributeSet);

    handleTextChanged();
}

/**
 * Runs your updates later, not during the event notification.
 */
private void handleTextChanged()
{
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run() {
            updateTextStyles();
        }
    });
}

/**
 * Build the regular expression that looks for the whole word of each word that you wish to find.  The "\\b" is the beginning or end of a word boundary.  The "|" is a regex "or" operator.
 * @return
 */
private Pattern buildPattern()
{
    StringBuilder sb = new StringBuilder();
    for (String token : ALL_WORDS_THAT_YOU_WANT_TO_FIND) {
        sb.append("\\b"); // Start of word boundary
        sb.append(token);
        sb.append("\\b|"); // End of word boundary and an or for the next word
    }
    if (sb.length() > 0) {
        sb.deleteCharAt(sb.length() - 1); // Remove the trailing "|"
    }

    Pattern p = Pattern.compile(sb.toString());

    return p;
}


private void updateTextStyles()
{
    // Clear existing styles
    styledDocument.setCharacterAttributes(0, yourTextPane.getText().length(), blackAttributeSet, true);

    // Look for tokens and highlight them
    Matcher matcher = pattern.matcher(yourTextPane.getText());
    while (matcher.find()) {
        // Change the color of recognized tokens
        styledDocument.setCharacterAttributes(matcher.start(), matcher.end() - matcher.start(), greenAttributeSet, false);
    }
}
}

と

((AbstractDocument) yourTextPane.getDocument()).setDocumentFilter(new CustomDocumentFilter());

つまり、新しい文字列ALL_WORDS_THAT_YOU_WANT_TO_FINDは自動的に色付けされます。削除しようと思った

styledDocument.setCharacterAttributes(0, yourTextPane.getText().length(), blackAttributeSet, true);

(つまり、前の色付きの単語を破棄しないため) しかし、それは機能しません: 最後の反復で与えられた入力単語の色を維持するだけです。どうすればそれができますか？