Read OR Modify PDF File In Java Using iText

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import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Image;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;
import com.itextpdf.text.pdf.PdfWriter;

public class JavaiTextReadModifyPDF {

	public static void main(String[] args) {

		try {
			// Read file using PdfReader
			PdfReader pdfReader = new PdfReader("HelloWorld.pdf");

			// Modify file using PdfReader
			PdfStamper pdfStamper = new PdfStamper(pdfReader, new FileOutputStream("HelloWorld-modified.pdf"));

			Image image = Image.getInstance("Tick.jpg");
			image.scaleAbsolute(100, 50);
			image.setAbsolutePosition(100f, 700f);

			for (int i = 1; i <= pdfReader.getNumberOfPages(); i++) {
				PdfContentByte content = pdfStamper.getUnderContent(i);
				content.addImage(image);
			}

			pdfStamper.close();

		} catch (IOException e) {
			e.printStackTrace();
		} catch (DocumentException e) {
			e.printStackTrace();
		}

	}
}

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