On Windows, exceptions are supported at the operating system level. Called Structured Exception Handling (SEH), they are the rough equivalent to Unix signals. Compilers that generate code for Windows typically take advantage of this, they use the SEH infrastructure to implement C++ exceptions. In keeping with the C++ standard, the throw and catch keywords only … Read more
The finally block contains statements to execute after the try and catch blocks execute but before the statements following the try…catch statement. The finally block executes whether or not an exception is thrown. If an exception is thrown, the statements in the finally block execute even if no catch block handles the exception. more The … Read more
Returning from inside a finally block will cause exceptions to be lost. A return statement inside a finally block will cause any exception that might be thrown in the try or catch block to be discarded. According to the Java Language Specification: If execution of the try block completes abruptly for any other reason R, … Read more
The feature has been implemented in this pull request and is now part of AngularJS. It was initially called “always” and then later renamed to finally, so the code should be as follow: LoadingOverlay.start(); Auth.initialize().then(function() { // Success handler }, function() { // Error handler }).finally(function() { // Always execute this on both error and … Read more
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
final final can be used to mark a variable “unchangeable” private final String name = “foo”; //the reference name can never change final can also make a method not “overrideable” public final String toString() { return “NULL”; } final can also make a class not “inheritable”. i.e. the class can not be subclassed. public final … Read more
Based on your example, it looks like you are trying to do something akin to always deleting a temporary file, regardless of how a script exits. In Bash to do this try the trap builtin command to trap the EXIT signal. #!/bin/bash trap ‘rm tmp’ EXIT if executeCommandWhichCanFail; then mv output else mv log exit … Read more
The purpose of a finally block is to ensure that code gets run in three circumstances which would not very cleanly be handled using “catch” blocks alone: If code within the try block exits via fallthrough or return If code within a catch block either rethrows the caught exception, or–accidentally or intentionally–ends up throwing a … Read more
What happens if an exception you’re not handling gets thrown? (I hope you’re not catching Throwable…) What happens if you return from inside the try block? What happens if the catch block throws an exception? A finally block makes sure that however you exit that block (modulo a few ways of aborting the whole process … Read more
I usually do it like this: try { // Use the resource. } catch( Exception ex ) { // Problem with the resource. } finally { // Put away the resource. closeQuietly( resource ); } Elsewhere: protected void closeQuietly( Resource resource ) { try { if (resource != null) { resource.close(); } } catch( Exception … Read more