program to count number of lines, Java

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//Title of this code
//'main' method must be in a class 'Rextester'.

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

class Rextester 
{
    public static void main(String args[])throws IOException 
    {
        String fname;
        Scanner obj=new Scanner(System.in); 
        System.out.println("Enter any file name:"); 
        fname=obj.nextLine();
        File f1 = new File(fname); 
        int s,nl=0,nc=0,nw=0; 
        if(f1.exists()) 
        {
            FileReader fs=new FileReader(f1); 
            BufferedReader br=new BufferedReader(fs); 
            while((s=br.read())!=-1) 
            {
                if(s=='\n') 
                nl++;  
                else if(s==' ') 
                nw++; 
                else
                nc++;
            }
            System.out.println("Number of lines is:"+nl); 
            System.out.println("Number of words is:"+nw); 
            System.out.println("Number of charcter is:"+nc);
        }
        else
        {
            System.out.println("File does not exist"); 
        }
    }
}

[ - ] Show input
Compilation time: 0.69 sec, absolute running time: 0.26 sec, cpu time: 0.14 sec, memory peak: 12 Mb, absolute service time: 1.32 sec