About Question enthuware.ocajp.i.v7.2.1348 :

[coelhorrc]

Why does the following code prints 5? I thought that every exception would stop the thread.

int k = 0;
try{
int i = 5/k;
}
catch (ArithmeticException e){
System.out.println("1");
}
catch (RuntimeException e){
System.out.println("2");
return ;
}
catch (Exception e){
System.out.println("3");
}
finally{
System.out.println("4");
}
System.out.println("5");

[admin]

If an exception is left uncaught, then that stops the thread. But here, we are catching the exception. You might want to check this out: http://www.javamex.com/tutorials/except ... dler.shtml

HTH,
Paul.

[Deleted User 1713]

In the explanation to the question it sais: "Remember : finally is always executed even if try or catch return; (Except when there is System.exit() in try.)"

You can also have System.exit() in the catch clause. This will prevent finally from being executed as well.

[admin]

Yes, that is a good point.

[Kevin30]

If I put a return statement in the catch (AritmeticException e) clause instead of the catch (RuntimeException e) clause, then 5 will not print:

Code: Select all

public class TestClass{
   public static void main(String args[]){
      int k = 0;
      try{
         int i = 5/k;
      }
      catch (ArithmeticException e){
         System.out.println("1");
         return ;
      }
      catch (RuntimeException e){
         System.out.println("2");
      }
      catch (Exception e){
         System.out.println("3");
      }
      finally{
         System.out.println("4");
      }
      System.out.println("5");
   }
}

The printout here is:
1
4

instead of:
1
4
5

Can you tell me what the logic is with regard to the return statement?
I'm guessing that the following things will happen, in order:
- of course the ArithmeticException is being caught,
- then 1 gets printed,
- then it encounters the return statement,
- but finally always runs (except in case of an System.exit()) so 4 gets printed,
- and now what? the code returns to where?

[admin]

The control returns to whoever called the method. In this case, it is the JVM that invoked the main method. So the control goes back to the JVM.