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PdfAction javaScript

import java.io.FileOutputStream; import java.util.HashMap; import java.util.List; import com.lowagie.text.Chunk; import com.lowagie.text.Document; import com.lowagie.text.pdf.PdfAction; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfOutline; import com.lowagie.text.pdf.PdfReader; import com.lowagie.text.pdf.PdfWriter; import com.lowagie.text.pdf.SimpleBookmark; import com.lowagie.text.pdf.SimpleNamedDestination; public class MainClass {   public static void main(String[] args) throws Exception {     Document document = new Document();     PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("2.pdf"));     writer.setViewerPreferences(PdfWriter.PageModeUseOutlines);     document.open();     document.add(new Chunk("asdf").setLocalDestination("Title"));     PdfContentByte cb = writer.getDirectContent();     PdfOutline root = cb.getRootOutline();     PdfOutline links = new PdfOutline(root, new PdfAction(), "Useful links");     links.setOpen(false);     new PdfOutline(links, new PdfAction("http://www.rntsoft.com"), "rntsoft.com");     PdfAction chained = PdfAction.javaScript("app.alert('alert');\r", writer);     chained.next(new PdfAction("http://www.rntsoft.com"));     document.close();     PdfReader reader = new PdfReader("2.pdf");     List list = SimpleBookmark.getBookmark(reader);     SimpleBookmark.exportToXML(list, new FileOutputStream(         "outline_actions1.xml"), "ISO8859-1", true);     HashMap map = SimpleNamedDestination.getNamedDestination(reader,         false);     SimpleNamedDestination.exportToXML(map, new FileOutputStream(         "outline_actions2.xml"), "ISO8859-1", true);        } }