Calculating Average from a CSV File

Question

I have a CSV file, format as follows:

City,Job,Salary Delhi,Doctors,500 Delhi,Lawyers,400 Delhi,Plumbers,100 London,Doctors,800 London,Lawyers,700 London,Plumbers,

Answer 1

br.readLine() before the while-loop will avoid header line problem, but if your data is not correct you will get same Exception again, so, in order to make a safer method you can change this line:

int sal=Integer.parseInt(country[2]);

With a try-catch block to iterate through entire file even if a value is not a valid number

int sal;
try {
    sal=Integer.parseInt(country[2]);
} catch (NumberFormatException e) {
    // if you want here you can show an error message 
    // to give feedback to the user there is not a valid number
}