An exception is an occurrence in an application process that requires deviation from the program's normal flow.

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0answers
11 views

Handling exception types according to the current “layer” of appplication

Imagine this simple application use case, say, for fetching data from outisde of the app. These steps represent the "depth" of the layers, from top to bottom. UI touch event ViewModel handles said ...
8
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2answers
408 views

Why are checked vs. unchecked exceptions called “the controversy” in Oracle Java tutorial?

I am new to Java and was reading its documentation on exceptions., and especially the Unchecked Exceptions — The Controversy page. The bottom-line says: If a client can reasonably be expected to ...
1
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3answers
129 views

Unlike C++, why does uncaught exception in JavaScript not terminate the script?

As someone used to C++ and new to JavaScript, I find this behavior odd. Whether a program runs directly on the platform like C++ ones, or it runs at a higher (or deeper?) level like JavaScript ones, ...
3
votes
3answers
410 views

In critical code, should exceptions describing a nonsense condition be handled?

Let us consider the following C# code as an example: public static string GetCurentExecutableDirectory() { return System.IO.Path.GetFullPath( System.Reflection.Assembly....
12
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6answers
521 views

Idiomatic usage of exceptions in C++

The isocpp.org exception FAQ states Do not use throw to indicate a coding error in usage of a function. Use assert or other mechanism to either send the process into a debugger or to crash the ...
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5answers
186 views

Finally block when no exceptions thrown

I'm doing some cleanup operations that could throw an exception, and I want to implement the logic of a finally block, but only if no exceptions are thrown: The initial implementation is this: ...
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2answers
105 views

Adding properties to exceptions

Is it wrong to add fields to exceptions? I have a problem that happens and I'm thinking of adding considerable information to an exception, but it sounds weird: an exception with getters. What you ...
5
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3answers
622 views

Is it a good practice to use suppress warnings in your code?

I use @SuppressWarnings("unchecked") and @SuppressWarnings("null") mostly above methods to let the code compile without any warnings but I have my doubts. Found this Stackoverflow question. Jon Skeet ...
2
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3answers
244 views

Why do assertions in Java need to get enabled?

I really like the concept of assertions in Java in the way how to use them. It's much easier than to write an if and then throw an Exception/Error. But the thing I don't understand is, why do they ...
3
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2answers
71 views

Is it ok to inherit certain exceptions and implement them only through their base types?

So, I was thinking about writing custom exceptions today, and considered the invalid operation exception. This exception can mean many many things, and in some actions, the operations might be invalid ...
0
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3answers
170 views

A very basic question about whether I should check for null and throw NPE? [duplicate]

Consider the below method- public void operationOnList(List<String> list) { list.add(1); } It is obvious that if l is null this method will throw a NullPointerException. My question is ...
1
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1answer
98 views

When we need to serialize an exception

I have been developing in Java since 8 months, and I didn't face a case where I went to serialize an exception, I'm asking because I saw the serialVersionUID and how Eclipse advise to add it ...
1
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2answers
67 views

Catching Exception and Recalling same function?

I have a function which sends data to a third-party's server using a library they've supplied. The function is very simple. It just takes a list of objects to send, loops through each item in the list,...
11
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5answers
408 views

Is indiscriminately catching exceptions (Pokemon exception handling) ever acceptable? [duplicate]

Normally, I don't anticipate exceptions and if I get them, its something that I can't fix in my code - bad user input or connectivity issues with the database. But errors do occur so at the very ...
3
votes
5answers
111 views

Use Exceptions for control flow in order to increase performance?

I add a lot of elements to a list of lists. If the list of lists my element should be saved to, does not exist yet, I handle this by catching an exception and adding a new list to my list of lists. ...
4
votes
2answers
92 views

Under what scenarios would 'functional' `Try` objects be more or less beneficial than 'rx' `Try` objects?

Definitions used by this question: 'functional' Try is what https://github.com/lambdista/try is. Success and Failure are subclasses of Try. Exceptions aren't thrown by the called function. 'rx' Try ...
14
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11answers
2k views

What is better IllegalStateException or silent method execution? [closed]

Let's say I have a MediaPlayer class which has play() and stop() methods. What is the best strategy to use when implementing the stop method in case when the play method has not been called before. I ...
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votes
1answer
87 views

Why can't be “real” custom exceptions be created? [closed]

By "real" I mean Exceptions that would work as the ones predefined by the system. I mean for a custom exception you have to use the reserved word throw CustomException once you have checked the ...
1
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1answer
104 views

Standalone library for error logging?

Background Here is how I currently log any exceptions that occur in my code: Pass each object instance the path to a file where I want all of the logging to happen. Each of the objects have their ...
2
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1answer
31 views

Appropriate Exception Type for Connecting to a Device via COM port

I'm working on creating a C# wrapper library around a native C library that allows me to directly communicate with a particular piece of hardware over a serial (COM) port. Of course, the C library ...
1
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1answer
109 views

The Same Behavior for Boolean and Exception

The following code uses a boolean preference active: In the active state, it does an operation which could throw an exception. On this exception, it does fall back to the non-active state. let active ...
-1
votes
2answers
111 views

How to validate Exception messages? [closed]

My superior asked me to validate each and every input field in the project that includes the Exception messages. So, am I correct in using Exceptional Handler for validating Exception message. ...
0
votes
1answer
120 views

Why is a Spring's HttpClientErrorException an unchecked exception?

Oracle summarises the purpose of unchecked exceptions as: The next question might be: "If it's so good to document a method's API, including the exceptions it can throw, why not specify runtime ...
3
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4answers
166 views

How to name an exception where condition is not exceptional

NOTE: This question is about finding a proper name for an exception where the condition for throwing the exception has not actually happened (eg. preventing a StackOverflow by throwing a ...
2
votes
2answers
91 views

Java EE exceptions for validation and APMs

In my current work, we have some Java EE applications and we use exceptions and exception mappers to deal with user errors, i.e. that can't be dealt with in the frontend. We usually reply with a 400, ...
2
votes
3answers
114 views

Dealing with runtime exceptions when reading from file

Let's say I read a bunch of numbers from a text file. Each line is initially a string, I need to parse it to an integer. This is where the first exception might happen - NumberFormatException thrown ...
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2answers
169 views

Exception Handling: When and Why?

The main languages I use are C++ and Java. Both languages support exception handling. I confess, I may not actually understand exception handling, at least, I certainly don't understand why you ...
4
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1answer
125 views

Overflow Exception Checking Problem

Background I have to call a method that needs to return a signed integer (see code block below) after converting from an unsigned integer. The reason for this is that I have to do bit-wise math that ...
6
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2answers
122 views

Returning Unmodifiable Collections only tees you up for runtime exceptions?

Seeing as how there are no distinct Unmodifiable Collections interfaces, aren't you just setting yourself up for runtime exceptions by returning Unmodifiable Collections from method invocations? ...
4
votes
1answer
119 views

Throwing an exception from within a constructor of an exception

As I was TDD-ing some code, it occurred to me that one of my typed exceptions could potentially throw a NullReferenceException while creating its error message. Here's the constructor for the typed ...
3
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2answers
116 views

Is an attempt to create a duplicate resource, e.g. a user, worthy of throwing an Exception?

Say I have an REST API for creating users in an application. The request goes to a controller, which marshals the request data into a domain object, and passes it to a service to create a user. Now, ...
2
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0answers
77 views

Design interfaces with annotated exceptions, but reduce the need for exception wrapping / re-branding?

I am designing a library with a bunch of interfaces with annotated exceptions. (The example is in (pseudo)PHP, but I am sure one could do something equivalent in Java or other.) For now, the ...
2
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2answers
320 views

Error handling in C++

So, in the recent weeks I delved into C++ programming, and I programmed some things in SDL. Doing so, you always have to deal with a lot of (ugly) C++ code, which looks more like C than C++. One thing ...
3
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4answers
257 views

Exception treatment with/without recursion

I've entered in an argument with a fellow colleague about a piece of code. While he thinks that it is ok, I don't. But I don't have any more arguments than that calling the same method (recursion) in ...
41
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8answers
4k views

Should I throw an exception in case of a meaningful value outside of the range or handle it myself?

I have written a struct that represents latitude/longitude coordinates. Their values range from -180 to 180 for longtitudes and 90 to -90 for lattitudes. If a user of that struct gives me a value ...
0
votes
1answer
177 views

What is considered best practice for custom exception classes?

Python has many strong conventions but I'm unclear on how best to manage exceptions for my module. I know it's generally good practice to define a custom exception for your module. E.g.: class ...
1
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1answer
53 views

How to find the cause of an exception in async code

I often see myself trying to follow my own code to find out where the exception came from. The typical example is when some parsing fails, and I catch the execption. Then I spend a ridiculous amount ...
0
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0answers
55 views

Is Shiro's use of Auth Exceptions an example of control flow? [duplicate]

In Java/OOP-land, it is a well established anti-pattern to use exceptions for control flow. Apache Shiro is one of the standard Java security frameworks. When using Shiro, especially when ...
12
votes
2answers
2k views

Is using Exceptions at the highest level of a program considered bad practice? [duplicate]

I have seen programs using this strategy and I have also seen posts considering this bad practice. However, the posts considering this bad practice have been written in c# or some other programming ...
25
votes
7answers
2k views

Should a C++ program catch all exceptions and prevent exceptions from bubbling up past main()?

I was once advised that a C++ program should ultimately catch all exceptions. The reasoning given at the time was essentially that programs which allow exceptions to bubble up outside of main() enter ...
1
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1answer
86 views

Does exception handling belong at the lowest level of the runtime?

I'm designing a fairly simplistic stack-based programming language, and implementing it in Python. (no link, because it's not fully implemented yet.) The language itself is essentially intended to be ...
5
votes
4answers
263 views

Handling exceptions I don't know about

When I work with handling exceptions, I notice that I often have to deal with the ones I had no idea about. Especially it is noticeable when I program a method that grabs data from web. An error may ...
3
votes
1answer
162 views

what happens at Java interpreter level when IncompatibleClassChangeError is thrown?

I am a noob at JVM internals. Can someone explain what happens at Java interpreter level when IncompatibleClassChangeError is thrown? I am facing an issue similar to the one described here: https:...
0
votes
1answer
135 views

How can you catch all index out of range errors in python?

Our program does these kinds of operations hundreds of times for many different variables and lists, then uses them throughout the program: variable = values[5] The list values are coming from the ...
1
vote
2answers
76 views

Should a client check for persisted item existence before modifying it?

I'm developing a MVC Web application with a REST interface. The REST controller performs actions on persisted items through a service class, which translates exceptions coming from the persistence ...
3
votes
3answers
179 views

Are exceptions only for handling errors?

I have a script that throws exceptions when something goes wrong. However, for the purposes of testing I also want to capture specific points although I'm not sure whether they would be deemed errors ...
1
vote
2answers
36 views

Exception Handling for class attributes in setters and constructors [closed]

I would like to discuss a question about best practices regarding exception handling (e.g. in Java). Normally, when setting the attributes of a class, I check the arguments in the setters for ...
-3
votes
5answers
375 views

Differences between `throw` and `throw new` and exactly how exceptions “bubble up” [closed]

Can someone please explain the differences in C# between: throw throw new and exactly how exceptions "bubble up" as I've heard they do? In my daily job, I've used just try/catch to mostly ...
-2
votes
1answer
46 views

Convention for exception argument order [closed]

Just a quick question about a design pattern for creating custom exceptions. The question is more about the order of parameters. If you can specify more data in the exception, should the parameter for ...
12
votes
6answers
515 views

Should I log errors on exception throwing constructors?

I was building an application for a few months and I come to realize a pattern that emerged: logger.error(ERROR_MSG); throw new Exception(ERROR_MSG); Or, when catching: try { // ...block that ...