  import java.io.FileNotFoundException; 
  import java.io.IOException; 
  import java.util.Scanner; 
 
  /** 
    This program reads a file containing numbers and analyzes its contents. 
     If the file doesn't exist or contains strings that are not numbers, an 
     error message is displayed. 
  */ 
 public class DataAnalyzer 
 { 
    public static void main(String[] args) 
    { 
    Scanner in = new Scanner(System.in); 
    DataSetReader reader = new DataSetReader(); 
 
    boolean done = false; 
    while (!done) 
    { 
       try 
       { 22          System.out.println(Please enter the file name: ); 
          String filename = in.next(); 
 
         double[] data = reader. readFile(filename) ; 
          double sum = 0; 
        for (double d : data) sum = sum + d; 
         System.out.println(The sum is  + sum); 
          done = true; 
       } 
       catch (FileNotFoundException exception) 
       { 
         System.out.println(File not found.); 
      } 
       catch (BadDataException exception) 
       { 
         System.out.println(Bad data:  + exception.getMessage()); 
       } 
       catch (IOException exception) 
       { 
          exception.printStackTrace(); 
      } 
    } 
  } 
}
