ExtractPDF.java

import org.apache.pdfbox.pdmodel.*;
import org.apache.pdfbox.text.PDFTextStripper;
import java.io.*;

import java.util.*;

public class ExtractPDF{
	
	public static void main(String[] args){
		PDDocument pd;
		BufferedWriter wr;
		try {
         File input = new File("vocab.pdf");  // The PDF file from where you would like to extract
         File output = new File("text"); // The text file where you are going to store the extracted data
         pd = PDDocument.load(input);
         System.out.println(pd.getNumberOfPages());
         System.out.println(pd.isEncrypted());
         pd.save("vocabcopy.pdf"); // Creates a copy called "CopyOfInvoice.pdf"
         PDFTextStripper stripper = new PDFTextStripper();
         stripper.setStartPage(1); //Start extracting from page 3
         stripper.setEndPage(141); //Extract till page 5
         wr = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(output)));
         stripper.writeText(pd, wr);
         if (pd != null) {
         	pd.close();
         }
        // I use close() to flush the stream.
         wr.close();
     } catch (Exception e){
     	e.printStackTrace();
     } 
 }
}