Project: Total Filter (Integer)
Write a filter program that accepts text representations of integer values, one per line, and then computes and prints the total. The program should print an error to STDERR if a line of input can't be parsed as an integer value.
Output
$ javac -Xlint TotalFilterInt.java
$ java -ea TotalFilterInt < ../../data/text/IntegerList1.txt
48541
$ javac -Xlint TotalFilterInt.java
$ java -ea TotalFilterInt < ../../data/text/IntegerList2.txt
49829
$ javac -Xlint TotalFilterInt.java
$ java -ea TotalFilterInt < ../../data/text/IntegerList3.txt
54467