java set value to pdf

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import com.lowagie.text.DocumentException;
import com.lowagie.text.pdf.BaseFont;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfStamper;

public class Test {
    
    public static void main(String[] args) throws DocumentException, IOException {
        PdfReader pdfReader = new PdfReader(new FileInputStream("C:/test.pdf"));
        PdfStamper pdfStamper = new PdfStamper(pdfReader, new FileOutputStream("C:/test1.pdf"));
        printText("tttttttt", pdfStamper, 1, 12, 200, 300);

        pdfStamper.close();
    }
    
    private static void printText(String policyNumber, PdfStamper pdfStamper, int page, int fontSize, int left, int bottom) throws DocumentException, IOException {
        BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.EMBEDDED);
        PdfContentByte content = pdfStamper.getOverContent(page);
        content.beginText();
        content.setFontAndSize(bf, fontSize);
        content.showTextAligned(PdfContentByte.ALIGN_LEFT, policyNumber, left, bottom, 0);
        content.endText();
        
    }
}