How to read an existing pdf file in java using iText jar?

import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.parser.PdfTextExtractor;
 
/**
 * This class is used to read an existing
 *  pdf file using iText jar.
 * @author w3schools
 */
public class PDFReadExample {
  public static void main(String args[]){
    try {
	//Create PdfReader instance.
	PdfReader pdfReader = new PdfReader("D:\\testFile.pdf");	
 
	//Get the number of pages in pdf.
	int pages = pdfReader.getNumberOfPages(); 
 
	//Iterate the pdf through pages.
	for(int i=1; i<=pages; i++) { 
	  //Extract the page content using PdfTextExtractor.
	  String pageContent = 
	  	PdfTextExtractor.getTextFromPage(pdfReader, i);
 
	  //Print the page content on console.
	  System.out.println("Content on Page "
	  		              + i + ": " + pageContent);
      }
 
      //Close the PdfReader.
      pdfReader.close();
    } catch (Exception e) {
	e.printStackTrace();
    }
  }
}

Content on Page 1: Hello world, this a test pdf file.