Help!!! - Line Count in Text file

Question

I need to write a program for an assignment due next week. I should read between 30 and 70 lines of text from a text file. Each line contains an integral number of words. The program is required to display all the words on each line in revers order: "pass before they can enter" to read "enter can they before pass". I can reverse the words but the issue of 30 - 70 lines is a problem. I have the following code. What I'm I doing wrong???
import java.io.*;
import java.util.*;
import java.util.StringTokenizer;
public class LineReaderVector{
public static void main(String args[])throws IOException{
BufferedReader in=new BufferedReader(new FileReader("inpfile.txt"));
LineNumberReader read=new LineNumberReader(new FileReader ("inpfile.txt"));
String thisLine;
int line=0;
while((thisLine=in.readLine()) !=null){
     line=read.getLineNumber();
     StringTokenizer st = new StringTokenizer(thisLine);
     Vector v1=new Vector();
     while (st.hasMoreTokens()){
          String part= st.nextToken();
          v1.addElement(part);
     line++;
     System.out.println("\n");
     int size=v1.size()-1;
     for(int i=size; i>-1; i--){
     System.out.print(v1.elementAt(i).toString()+" ");
}

Answer 1

To read a file line by line this should do:
try
  BufferedReader br = new BufferedReader(new FileReader("inpfile.txt"));
  String s = br.readLine();
  while (s != null)
    System.out.println(s);
    s = br.readLine();
  br.close();
catch (IOException ex)
  ex.printStackTrace();
...