init

a.java

+import com.itextpdf.text.pdf.PdfReader;
+
+public class a{
+    public static void main(String args[]){
+    
+        try{
+            PdfReader pdfReader = new PdfReader("a.pdf");
+            System.out.println(pdfReader.getNumberOfPages());
+                
+        } catch (Exception e){
+            System.out.println(e.getMessage());
+        }
+
+    }
+}