help inputting values into an array

[pds8475]

hi im trying to enter the values from gn.txt into the array guestNumbers
but when im running the program im getting a null pointer exception

 int lineCount = 0;  

 BufferedReader br2 = new BufferedReader(new FileReader("gn.txt"));  
 while ((line = br2.readLine()) != null) {  
 lineCount++;  
 
 } 
 System.out.println(lineCount);
double guestNumbers[] = new double[lineCount];
  
       for(int c=0; c< lineCount; c++)
{
             
             double e=Double.parseDouble(br2.readLine());
               System.out.println(e);
            guestNumbers[c]= e;
}

System.out.println(guestNumbers[0]);
System.out.println(guestNumbers[1]);
System.out.println(guestNumbers[2]);
System.out.println(guestNumbers[3]);

[Petr]

Hi, Can you show content a file "gn.text"?
What number line, where you have exception?

[Quantum]

The FileReader constructor expects a File. Create the File first.

[pds8475]

right iv now got it to ouput to the screen the right values using the code

    String e1;
       double e;
       for(int i=0; ng.hasNext();i++){
         e1=ng.next();
         e=Double.parseDouble(e1);
         guestNumbers[i]=e;
       }


System.out.println(guestNumbers[0]);
System.out.println(guestNumbers[1]);
System.out.println(guestNumbers[2]);
System.out.println(guestNumbers[3]);

this outputs to the screen as:

1.0
2.0
3.0
1.0

now i need to add all the values together
any idea's