Add writing

a.java

-import com.itextpdf.text.pdf.PdfReader;
-import com.itextpdf.text.pdf.parser.PdfTextExtractor;
+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 a{
     public static void main(String args[]){
     
         try{
-            PdfReader pdfReader = new PdfReader("a.pdf");
-            int cnt =pdfReader.getNumberOfPages();
-            for(int i=1 ; i<=cnt ; i++){
-                String str = PdfTextExtractor.getTextFromPage(pdfReader, i);
-                System.out.println(str);
-            }
-
-                
+            Document doc = new Document();
+
+            OutputStream ostream = new FileOutputStream(new File("b.pdf"));
+
+            PdfWriter.getInstance(doc, ostream); 
+
+            doc.open();
+
+            doc.add(new Paragraph("salam salam"));
+
+            doc.close();
+            ostream.close();
+
         } catch (Exception e){
             System.out.println(e.getMessage());
         }