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Marcin Łuszkiewicz
6,061 Pointscompiler error in challenge
In this chalenge I always see Bummer! There is a compiler error. Please click on preview to view your syntax errors! and the error is: JavaTester.java:22: error: exception Exception is never thrown in body of corresponding try statement
} catch(Exception ex) {
But in my code I wrote catch (Exception e) - not Exception ex so this error is not reffering to my code!
// assetManager, assetName, and fileToWrite have been initialized elsewhere
try {
InputStream in = assetManager.open(assetName);
FileOutputStream out = new FileOutputStream(fileToWrite);
copyFile(in, out);
} catch (Exception e) {
e.printStackTrace();
}
2 Answers
MUZ140054 Spencer Chigananda
4,347 PointsThere is no error in the question. This is the code I used to solve it. You are supposed to throw a generic Exception which is to be caught.
Try{ //the code given by the question throw new Exception(); }catch(Exception e){ e.printStackTrace(); }
George Pirchalaishvili
3,747 PointsThis is bugged exercise :) I saw couple other people, who could not finish it.
George Pirchalaishvili
3,747 PointsGeorge Pirchalaishvili
3,747 Pointsproblem is that you cannot throw and exception on copyFile method, since you cannot see it.
MUZ140054 Spencer Chigananda
4,347 PointsMUZ140054 Spencer Chigananda
4,347 PointsGeorge Pirchalaishvili yes you can. So are you implying that you only throw exceptions on methods that you can 'see'?
George Pirchalaishvili
3,747 PointsGeorge Pirchalaishvili
3,747 PointsWell as I understand that, is that when you declare a method, you can state that it throws the exception, if you do so, exception will be handled no inside the method, but where the method is called (like in this particular example).
What you are referring to is called catching exception not throwing it:
Problem is, that here you are trying to catch an exception which should be thrown by method copyFile, but if doesnt state in copyFile method that it throws an exception - it should be handled not here, but inside the method itself.
At least thats how I understand the system.
George Pirchalaishvili
3,747 PointsGeorge Pirchalaishvili
3,747 PointsI just tried it - it works. But you are catching just new exception, which is not exception from the code itself. It is nice workaround, but still mistake in exercise.