Typical Data

Here are the lines in a typical input file named dailyRobins.txt that records the number of robins seen for several days in Spring.

3
6
12
17
14
4
32
23
19

Here are some runs of the program. First, a file containing the above data:

C:\JavaSource>java SumFileData
Input file name:
dailyRobins.txt
Sum = 130

Next, a mis-named file:

C:\JavaSource>java SumFileData
Input file name:
dailyCrows.txt
Exception in thread "main" java.io.FileNotFoundException: dailyCrows.txt (The system cannot find the file specified)
        at java.io.FileInputStream.open0(Native Method)
        at java.io.FileInputStream.open(Unknown Source)
        at java.io.FileInputStream.(Unknown Source)
        at java.util.Scanner.(Unknown Source)
        at SumFileData.main(SumFileData.java:20)

Finally, a file with some non-intger data:

C:\JavaSource>java SumFileData
Input file name:
dailyRobins.txt
Exception in thread "main" java.util.InputMismatchException
        at java.util.Scanner.throwFor(Unknown Source)
        at java.util.Scanner.next(Unknown Source)
        at java.util.Scanner.nextInt(Unknown Source)
        at java.util.Scanner.nextInt(Unknown Source)
        at SumFileData.main(SumFileData.java:24)

In the last run the data file had a line that could not be parsed as an int.

3 6 12 17
14 4 32
23
19