Java Utililty Methods JTextPane

void addStyle(JTextPane textPane, String name, Color foreground)
add Style

addStyle(textPane, name, foreground, null, false);

void appendAsGreen(JTextPane pane, String fontName, int fontSize, String s)
append As Green

if (pane.getStyle("greenStyle") == null) {
 Style greenStyle = pane.addStyle("greenStyle", null);
 StyleConstants.setForeground(greenStyle, SUCCESSFUL_GREEN);
 StyleConstants.setFontFamily(greenStyle, fontName);
 StyleConstants.setFontSize(greenStyle, fontSize);
StyledDocument doc = (StyledDocument) pane.getDocument();
try {
...

void appendAsMessage(JTextPane pane, String fontName, int fontSize, String s)
Appends a given string to the StyledDocument of a pane as a message, that is, using the Style 'MessageStyle'.

if (pane.getStyle("MessageStyle") == null) {
 Style messageStyle = pane.addStyle("MessageStyle", null);
 StyleConstants.setForeground(messageStyle, Color.BLACK);
 StyleConstants.setFontFamily(messageStyle, fontName);
 StyleConstants.setFontSize(messageStyle, fontSize);
StyledDocument doc = (StyledDocument) pane.getDocument();
try {
...

void appendString(String str, JTextPane jtext)
append String

StyledDocument document = (StyledDocument) jtext.getDocument();
document.insertString(document.getLength(), str, null);

void appendToPane(JTextPane textPane, String text, Color foregroundColor, Color backgroundColor)
Append some text in one JTextPane, using colors.

StyleContext sc = StyleContext.getDefaultStyleContext();
AttributeSet aset = sc.addAttribute(SimpleAttributeSet.EMPTY, StyleConstants.Foreground, foregroundColor);
aset = sc.addAttribute(aset, StyleConstants.Background, backgroundColor);
int len = textPane.getDocument().getLength();
textPane.setCaretPosition(len);
textPane.setCharacterAttributes(aset, false);
textPane.replaceSelection(text);

void applyRegex(String regex, JTextPane pane, Color highlightColor)
apply Regex

Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(pane.getText());
while (matcher.find()) {
 StyleContext sc = StyleContext.getDefaultStyleContext();
 AttributeSet aset = sc.addAttribute(SimpleAttributeSet.EMPTY, StyleConstants.Foreground,
 highlightColor);
 pane.getStyledDocument().setCharacterAttributes(matcher.start(), matcher.end() - matcher.start(), aset,
 true);
...

void centerText(JTextPane pane)
center Text

StyledDocument doc = pane.getStyledDocument();
SimpleAttributeSet center = new SimpleAttributeSet();
StyleConstants.setAlignment(center, StyleConstants.ALIGN_CENTER);
doc.setParagraphAttributes(0, doc.getLength(), center, false);

JTextPane createJTextPane(String text, Color backgroundColor)
Creates a new JTextPane object with the given properties.

JTextPane jTextPane = new JTextPane();
jTextPane.setBorder(null);
jTextPane.setEditable(false);
jTextPane.setBackground(backgroundColor);
jTextPane.setFont(new Font("Times New Roman", Font.PLAIN, 14));
if (text != null) {
 jTextPane.setText(text);
jTextPane.setVerifyInputWhenFocusTarget(false);
jTextPane.setAutoscrolls(false);
return jTextPane;

JScrollPane createTextPaneScrollPane(JTextPane textPane)
Creates a default scroll pane for a text pane.

JPanel noWrapPanel = new JPanel(new BorderLayout());
noWrapPanel.add(textPane);
JScrollPane scrollPane = new JScrollPane(noWrapPanel);
scrollPane.getVerticalScrollBar().setUnitIncrement(textPane.getFont().getSize() * 2);
return scrollPane;

String getFontFamily(JTextPane textPane)
Returns the font family of the current character.

String family = (String) (textPane.getInputAttributes().getAttribute(StyleConstants.FontFamily));
return family;