java program which read data from file and show their details

package june29;

import java.io.FileInputStream;
import java.util.Scanner;

public class input_from_file {

public static void main(String[] args) throws Exception


{


 Scanner sc = new Scanner(System.in);

 System.out.print("enter a file name with full path: ");


 String filePath=sc.nextLine();


 FileInputStream fis=new FileInputStream(filePath);


 int bytes=fis.available();



 int alphaUpper=0, alphaLower=0, numeric=0, space=0, line=1;

 System.out.println("showing file data ->");

 while(true)
 {

  int var=fis.read();
 
  if(var==-1) {
   break;
  }

  if(var>='A' && var<='Z') {
   alphaUpper++;
  }
  else if(var>='a' && var<='z') {
   alphaLower++;
  }

  else if(var>='0' && var<='9') {
   numeric++;
  }
  else if(var==' ') {
   space++;
  }

  else if(var=='\n') {
   line++;
  }
 
  System.out.print((char)var);
 }
 System.out.println("\n---------------------------------------------");
 System.out.println("Details of file "+filePath+"->");
 System.out.println("Alphabets in uppercase: "+alphaUpper);
 System.out.println("Alphabets in lowercase: "+alphaLower);
 System.out.println("Total Alphabets: "+(alphaLower+alphaUpper));
 System.out.println("Numerics: "+numeric);
 System.out.println("Spaces: "+space);
 System.out.println("Lines: "+line);
 System.out.println("file size: "+bytes+" bytes");
 System.out.println("---------------------------------------------");
 

 fis.close();

}
}