Sure.
The program can be written to do the problem using keyboard input. Once it has been tested and debugged, it can be used with the input file. Here is a start on the program:
import java.io.*;
class AddUpFile
{
public static void main ( String[] args ) throws IOException
{
int value;
int sum = _________________; // initialize sum
String line;
BufferedReader stdin = new BufferedReader(
new InputStreamReader( System.in ) );
int count = _________________; // initialize count
while ( count ____ 100 )
{
System.out.println("Enter a number:");
line = stdin.readLine();
value = Integer.parseInt( line.trim() );
sum = _________________; // add to the sum
count = _________________; // increment count
}
System.out.println( "Grand Total: " + sum );
}
}