4Th change

src/PdfWriteTest.java

+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.OutputStream;
+import com.itextpdf.text.Document;
+import com.itextpdf.text.Paragraph;
+import com.itextpdf.text.pdf.PdfWriter;
+public class PdfWriteTest {
+    public static void main(String[] args) {
+        try {
+            //Create Document instance.
+            Document document = new Document();
+
+            //Create OutputStream instance.
+            OutputStream outputStream =
+                    new FileOutputStream(new File("TestFile.pdf"));
+
+            //Create PDFWriter instance.
+            PdfWriter.getInstance(document, outputStream);
+
+            //Open the document.
+            document.open();
+
+            //Add content to the document.
+            document.add(new Paragraph("Hello world, " +"this is a test pdf file."));
+            //Close document and outputStream.
+            document.close();
+            outputStream.close();
+
+            System.out.println("Pdf created successfully.");
+        }
+        catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}