Is Oracle's TextFieldDemo example catching the wrong Exception?

Asked Apr 20 '16 at 23:40

Active Apr 20 '16 at 23:40

Viewed 30 times

I tried Oracle's TextFieldDemo.java example. Initially I did not have file "content.txt" in the correct folder, and the Demo bombed with a StackTrace. Ugly. But the file read code does have try-catch for IOException:

InputStream in = getClass().getResourceAsStream("content.txt");
try {
    textArea.read(new InputStreamReader(in), null);
} catch (IOException e) {
    e.printStackTrace();
}

So, I changed 'e.printStackTrace()' to 'System.out.println("Cannot find file");' and still got the StackTrace.

So, I changed 'IOException' to 'Exception', and the program ended gracefully with my message.

Is Oracle's TFDemo catching the wrong exception?

asked Apr 20 '16 at 23:40

KeyLawson

Why not try e.toString(); intstead? In any way you should be looking for FileNotFoundException – access_granted Apr 21 '16 at 00:15
I will try e.toString(). Thanks. I did try e.getMessage() and got 'null'. – KeyLawson Apr 21 '16 at 07:25
I also tried a catch block for FileNotFoundException, and got no hits. As far as I can tell, no-one is throwing that Exception. – KeyLawson Apr 21 '16 at 07:27
e.toString() returns 'java.lang.NullPointerException'. – KeyLawson Apr 21 '16 at 19:14
so you likely don't have the content.txt file to begin with. Throw the try before the first line instead. – access_granted Apr 21 '16 at 20:37
Good point and suggestion. I moved the '= getClass()...' statement into the try block, and still 'catch (Exception)' is the only catch block that executes. – KeyLawson Apr 22 '16 at 14:34

Is Oracle's TextFieldDemo example catching the wrong Exception?

0 Answers0