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Fill AcroForm

import java.io.FileOutputStream; import com.lowagie.text.Document; import com.lowagie.text.PageSize; import com.lowagie.text.Rectangle; import com.lowagie.text.pdf.AcroFields; import com.lowagie.text.pdf.BaseFont; import com.lowagie.text.pdf.GrayColor; import com.lowagie.text.pdf.PdfContentByte; import com.lowagie.text.pdf.PdfReader; import com.lowagie.text.pdf.PdfStamper; import com.lowagie.text.pdf.PdfWriter; import com.lowagie.text.pdf.TextField; public class MainClass {   public static void main(String[] args) throws Exception {     Document document = new Document(PageSize.A4);     PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(         "HelloWorldForm.pdf"));     document.open();     BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI,         BaseFont.NOT_EMBEDDED);     PdfContentByte cb = writer.getDirectContent();     cb.beginText();     cb.setFontAndSize(bf, 12);     cb.moveText(36f, 788);     cb.showText("Hello");     cb.endText();     TextField tf = new TextField(writer, new Rectangle(67, 785, 340, 800),         "Who");     tf.setFontSize(12);     tf.setFont(bf);     tf.setText("Who?");     tf.setTextColor(new GrayColor(0.5f));     writer.addAnnotation(tf.getTextField());     document.close();     PdfReader reader;     PdfStamper stamper;     AcroFields form;     reader = new PdfReader("HelloWorldForm.pdf");     stamper = new PdfStamper(reader, new FileOutputStream(         "HelloWorldFilledInForm.pdf"));     form = stamper.getAcroFields();     form.setField("Who", "World");     stamper.close();     reader = new PdfReader("HelloWorldForm.pdf");     stamper = new PdfStamper(reader, new FileOutputStream(         "HelloWorldFilledInFlattened.pdf"));     form = stamper.getAcroFields();     form.setField("Who", "People");     stamper.setFormFlattening(true);     stamper.close();   } }