Java tutorial
import java.io.FileOutputStream; import com.lowagie.text.Document; import com.lowagie.text.PageSize; import com.lowagie.text.Rectangle; import com.lowagie.text.pdf.PdfAnnotation; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfFormField; import com.lowagie.text.pdf.PdfWriter; public class FormComboPDF { public static void main(String[] args) { Document document = new Document(PageSize.A4); try { PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream("FormComboPDF.pdf")); document.open(); PdfContentByte cb = writer.getDirectContent(); cb.moveTo(0, 0); String options[] = { "A", "B", "C" }; PdfFormField field = PdfFormField.createCombo(writer, true, options, 0); field.setWidget(new Rectangle(100, 700, 180, 720), PdfAnnotation.HIGHLIGHT_INVERT); field.setFieldName("ACombo"); field.setValueAsString("B"); writer.addAnnotation(field); } catch (Exception e) { System.err.println(e.getMessage()); } document.close(); } }