private void changeStyleProgrammatically() {
// Set the font for all token types.
setFont(textArea, new Font("Courier New", Font.PLAIN, 12));
// Change a few things here and there.
SyntaxScheme scheme = textArea.getSyntaxScheme();
scheme.getStyle(Token.RESERVED_WORD).background = Color.white;
scheme.getStyle(Token.RESERVED_WORD).foreground = Color.MAGENTA.darker().darker();
scheme.getStyle(Token.DATA_TYPE).foreground = Color.blue;
scheme.getStyle(Token.LITERAL_STRING_DOUBLE_QUOTE).underline = true;
scheme.getStyle(Token.LITERAL_NUMBER_HEXADECIMAL).underline = true;
scheme.getStyle(Token.LITERAL_NUMBER_HEXADECIMAL).background = Color.pink;
scheme.getStyle(Token.COMMENT_EOL).font = new Font("Georgia", Font.ITALIC, 10);
textArea.revalidate();
}