Java Programming

Hi! I keep getting this "int cannot be dereferenced" error msg all the time... Can you help me correct my codes please??

import java.io.*;
import java.util.*;

public class Q4
{
public static void main(String [] args)
{
try
{

Scanner sf=new Scanner(new FileReader("Input.txt"));

int x=1;
while (x.hasNext())
{
x=sf.nextInt();
System.out.print(x + " ");
}
}
catch (IOException e)
{
System.out.println("Input error");
}

}
}

Thanks a lot...