/**
*Output:
Average is 6.2
*/
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;
public class MainClass {
public static void main(String args[]) throws IOException {
int count = 0;
double sum = 0.0;
FileWriter fout = new FileWriter("test.txt");
fout.write("2, 3.4, 5,6, 7.4, 9.1, 10.5, done");
fout.close();
FileReader fin = new FileReader("Test.txt");
Scanner src = new Scanner(fin);
src.useDelimiter(", *");
while (src.hasNext()) {
if (src.hasNextDouble()) {
sum += src.nextDouble();
count++;
} else {
String str = src.next();
if (str.equals("done"))
break;
else {
System.out.println("File format error.");
return;
}
}
}
fin.close();
System.out.println("Average is " + sum / count);
}
}