Java tutorial
import java.io.FileOutputStream; import com.lowagie.text.Document; import com.lowagie.text.Paragraph; import com.lowagie.text.pdf.PdfAction; import com.lowagie.text.pdf.PdfWriter; public class MainClass { public static void main(String[] args) throws Exception { Document document = new Document(); PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf")); document.open(); document.add(new Paragraph("alert messages.")); writer.setPageAction(PdfWriter.PAGE_OPEN, PdfAction.javaScript("app.alert('You have reached page 3');\r", writer)); writer.setPageAction(PdfWriter.PAGE_CLOSE, PdfAction.javaScript("app.alert('You have left page 3');\r", writer)); document.add(new Paragraph("Page 3")); document.close(); } }