You can bind the whole pattern to a variable like this: try { throw new java.io.IOException(“no such file”) } catch { // prints out “java.io.IOException: no such file” case e @ (_ : RuntimeException | _ : java.io.IOException) => println(e) } See the Scala Language Specification page 118 paragraph 8.1.11 called Pattern alternatives. Watch Pattern … Read more
function _modulename_getData($field, $table) { try { if (empty($field)) { throw new Exception(“The field is undefined.”); } // rest of code here… } catch (Exception $e) { /* Here you can either echo the exception message like: echo $e->getMessage(); Or you can throw the Exception Object $e like: throw $e; */ } }
The Java Language Specification specifies that it is closed only if non-null, in section 14.20.3. try-with-resources: A resource is closed only if it initialized to a non-null value. This can actually be useful, when a resource might present sometimes, and absent others. For example, say you might or might not have a closeable proxy to … Read more
Important note The following discussion assumes that we are talking about code structured as in the example above: no matter which alternative is chosen, an exception will cause the method to logically stop doing whatever it was in the middle of. As long as you intend to do the same thing no matter which statement … Read more
You can create rather complex regular expression but it isn’t worth that. Using exceptions here is absolutely normal. It’s natural exceptional situation: you assume that there is an integer in the string but indeed there is something else. Exception should be thrown and handled properly. If you look inside parseLong code, you’ll see that there … Read more
Of course, there are always exceptions to rules, but if you need a rule of thumb – then you are correct; empty catch blocks are “absolutely” bad practice. Let’s have a closer look, first starting with your specific example: try { View view = findViewById(R.id.toolbar); } catch(Exception e) { } So, a reference to something … Read more
A clearer way without an extra return statement is as follows. I wouldn’t catch CloneNotSupportedException either, but let it go to the caller. if (a != null) { try { return a.clone(); } catch (CloneNotSupportedException e) { e.printStackTrace(); } } throw new TotallyFooException(); It’s almost always possible to fiddle with the order to end up … Read more
catch an exception only if you can handle it in a meaningful way declare throwing the exception upward if it is to be handled by the consumer of the current method throw exceptions if they are caused by the input parameters (but these are more often unchecked)
If the return in the try block is reached, it transfers control to the finally block, and the function eventually returns normally (not a throw). If an exception occurs, but then the code reaches a return from the catch block, control is transferred to the finally block and the function eventually returns normally (not a … Read more
No it does not. It will always execute provided the application is still running (except during a FastFail exception, MSDN link, like others noted). It will execute when it exits the try/catch portion of the block. It will NOT execute if the application crashes: gets killed through a kill process command etc. This is highly … Read more