itext Styles: iText 5 versus iText 7 HelloWorldStyles.java (iText 7)

Example

In this iText 7 example, we need to switch between different styles in the same document:

The best way to achieve this in iText 7, is to create a Style object, and to apply that Style to a Text object:

public void createPdf(String dest) throws IOException {
    PdfDocument pdf = new PdfDocument(new PdfWriter(dest));
    PdfFont code = PdfFontFactory.createFont(FontConstants.COURIER);
    Style style = new Style()
        .setFont(code)
        .setFontSize(12)
        .setFontColor(Color.RED)
        .setBackgroundColor(Color.LIGHT_GRAY);
    try (Document document = new Document(pdf)) {
        document.add(
            new Paragraph()
                .add("In this example, named ")
                .add(new Text("HelloWorldStyles").addStyle(style))
                .add(", we experiment with some text in ")
                .add(new Text("code style").addStyle(style))
                .add("."));
    }
}

Source: developers.itextpdf.com and the iText 7: Building Blocks tutorial.