StyleSheet styleSheet = new StyleSheet(); Style headingStyle = new Style("HeadingStyle"); headingStyle.setFont(new Font("Arial", Font.BOLD, 20)); headingStyle.setColor(Color.RED); headingStyle.setBorder(new LineBorder(Color.BLACK, 2)); styleSheet.addStyle(headingStyle); Document document = new Document(); document.setStyles(styleSheet); Paragraph heading = new Paragraph("Hello, World!"); heading.setStyle("HeadingStyle"); document.add(heading);