Storing information in a Vector from a file.

Question

When I try to compile the following program below, I am receiving three error messages stating:
1) Reference to Variable size as if it was a method.
2) Method elementAt(int) not found in vector class.
3) Method addElement(Movie) not found in vector class.
Is it possible for somebody to give me some feedback in reference to solving my problem?
import java.io.*;
import java.util.*;
public class Main_vector{
public static void main(String argv[])throws IOException{
Vector main_vector = Vector.read_vector("In.file");
int size = main_vector.size();
for(int counter = 0;counter < size;++counter){
System.out.println("Information in vector "+ ((Movie)main_vector.elementAt(counter)).rating());
import java.io.*;
import java.util.*;
public class Vector{
public static Vector read_vector(String filename)throws IOException{
FileInputStream stream = new FileInputStream("In.file");
InputStreamReader reader = new InputStreamReader(stream);
StreamTokenizer tokens = new StreamTokenizer(reader);
Vector v = new Vector();
while(tokens.nextToken() != tokens.TT_EOF){
int x = (int) tokens.nval;
tokens.nextToken();
int y = (int) tokens.nval;
tokens.nextToken();
int z = (int) tokens.nval;
v.addElement(new Movie(x,y,z));
return v;
}

Answer 1

1) Reference to Variable size as if it was a method.
Are you sure you get this? Where?
2) Method elementAt(int) not found in vector class.
your own Vector class hides java.util.Vector so you need to use java.util.Vector whenever you mean java.util.Vector and use Vector whenever you mean your own Vector class
3) Method addElement(Movie) not found in vector class.
same as above