Reading PDF By Using Java

i am reading pdf through java and write that data in .csv file.problem is like that when i read 500 pages from pdf at that time they can write only 496 lines what can i do for that i can read all 500 pages from the pdf .my code is like..............

public class pdf1 {
public static void main(String[] args) throws SQLException, ClassNotFoundException {
try {
PdfReader reader = new PdfReader("me1.pdf");

//int n = reader.getNumberOfPages();
File outFile = new File("b.csv");
int n=500;
int count=0;
BufferedWriter writer = new BufferedWriter(new FileWriter(outFile));

[code]....