Get Pdf document size

import java.io.FileOutputStream;

import java.io.IOException;

import com.lowagie.text.Document;

import com.lowagie.text.pdf.PdfReader;

import com.lowagie.text.pdf.PdfStamper;

import com.lowagie.text.pdf.PdfWriter;

public class MainClass {

public static void main(String[] args) throws Exception {

PdfReader reader = new PdfReader("1.pdf");

PdfStamper stamper = new PdfStamper(reader, new FileOutputStream("my.pdf"),PdfWriter.VERSION_1_5);

stamper.setFullCompression();

stamper.close();

reader = new PdfReader("1.pdf");

stamper = new PdfStamper(reader, new FileOutputStream("myDecompressed.pdf"), '1');

Document.compress = false;

int total = reader.getNumberOfPages() + 1;

for (int i = 1; i < total; i++) {

reader.setPageContent(i, reader.getPageContent(i));

}

stamper.close();

showFileSize("1.pdf");

showFileSize("my.pdf");

showFileSize("myDecompressed.pdf");

}

private static void showFileSize(String filename) throws IOException {

PdfReader reader = new PdfReader(filename);

System.out.print("Size ");

System.out.print(filename);

System.out.print(": ");

System.out.println(reader.getFileLength());

}

}