Exceptions ExamLab 6.0

[Vyas Sanzgiri]

ExamLab 6.0 does not allow user to save the test but I vaguely remember some question like this:

 
		int i = 4;
		try {
			i = i / 0;
		} catch (InterruptedException e) {
			
		} catch (Exception e) {

		}
   

In such a case, why is there an compilation error at line 5 and not line 7. What is the logic used?

[Mohamamd Amin]

The code within the try and catch statement does not throw InterruptedException. There will be no compilation errors when you remove the following statement:
catch (InterruptedException e) {
}

because catch(Exception e) will catch the exception and the program will terminate normally.

[Vyas Sanzgiri]

InterruptedException is a subclass of Exception so why does the compiler "pick" on InterruptedException and not on Exception

[Ruben Soto]

Vyas Sanzgiri wrote:InterruptedException is a subclass of Exception so why does the compiler "pick" on InterruptedException and not on Exception

Because the Java specification allows to catch Exception (but not specific checked exceptions.) The point is that you could catch a runtime exception with an Exception catch. And, the compiler can only enforce this rule for checked exceptions, because they are the only ones that methods are forced to declare.

[Vyas Sanzgiri]

point noted.