Antwort When should you not catch exceptions? Weitere Antworten – When not to use exceptions
The best advice for deciding when to use exceptions is to throw exceptions only when a function fails to meet its specification.
- Not for asynchronous events.
- Not for benign error conditions.
- Not for flow–of–control.
- You're not forced to use exceptions.
- New exceptions, old code.
- Do not use try-catch unless you actually can handle specific exceptions.
- If you need to catch general exceptions, always rethrow them.
- If possible to handle errors without exceptions, do so only for perf critical code and only if profiling will show you exceptions are the top issue.
It's sometimes better to catch a standard exception and to wrap it into a custom one. A typical example for such an exception is an application or framework specific business exception. That allows you to add additional information and you can also implement a special handling for your exception class.
Is it bad to catch exception : There's nothing wrong with this approach as long as you don't remove the cause. When you instantiate a new exception, you should always set the caught exception as its cause. Otherwise, you lose the message and stack trace that describe the exceptional event that caused your exception.
Why you should not throw exceptions
Throwing an exception from a finalizer causes the CLR to fail fast, which tears down the process. Therefore, throwing exceptions in a finalizer should always be avoided.
What is the disadvantage of exception : Disadvantages of Exception Handling:
Increased code complexity: Exception handling can make your code more complex, especially if you have to handle multiple types of exceptions or implement complex error handling logic.
In 'if-else' the conditions and the codes inside the blocks are got mixed, so that it becomes unreadable if there is many 'if-else' blocks. In 'try-catch' the codes to handle the exceptions and what exception to be handled, that are easily readable. In 'if-else', we have one else block corresponding to one if block.
Although it might seem like a good idea to wrap all of your code in try-catch blocks to ensure that any exceptions are caught, this approach can actually harm your code. Overuse of try-catch blocks can lead to cluttered code and make it difficult to understand what's happening in your program.
Is catching runtime exceptions bad practice
It's generally considered bad practice to throw a RuntimeException as it prevents a calling method from being able to handle an exception generated from your application differently than a real, system-generated exception.What happens if an exception is not caught If an exception is not caught (with a catch block), the runtime system will abort the program (i.e. crash) and an exception message will print to the console. The message typically includes: name of exception type.If you know that an entity might not pass the validation tests, you should not throw an exception. This is considered also a “normal” flow. Users are expected to input something wrong at some point.
Exceptions should not be the norm. They involve the creation of an additional object, so, if only from a performance standpoint, it is problematic if exceptions can occur frequently. Mixing data and control should be avoided. The alternative to throwing an exception is often returning a null value from a method.
Is throwing exceptions bad in Java : The throws declaration is part of the method contract. You should always be as precise as possible when defining contracts. Saying throws Exception is therefore a bad idea. It's bad for the same reason it is bad practice to say a method returns an Object when it is guaranteed to return a String .
What are potential disadvantages of handling exceptions : Since exception handling is too keen to deal with the 'normal flow' of a program, it mostly abhors the possibility of the generation of the code for error handling. There are no garbage collectors which are built-in and thus, exception handling may often result in the leakage of confidential resources.
What is the main problem with managing by exception
Disadvantages of MBE
Employee disengagement: While it can be empowering for some employees to resolve minor exceptions internally, MBE's assignment of high-impact decisions to upper management can be demotivating for some more junior employees.
Avoid if-else When Assigning Value to a Variable
While it might not seem bad, you could easily end up inverting or tweaking the conditional logic to give a whole new meaning.Furthermore ELSE IF is more efficient because the computer only has to check conditions until it finds a condition that returns the value TRUE. By using multiple IF-conditions the computer has to go through each and every condition and thus multiple IF-conditions require more time.
Why not use if else instead of try-catch : In 'if-else' the conditions and the codes inside the blocks are got mixed, so that it becomes unreadable if there is many 'if-else' blocks. In 'try-catch' the codes to handle the exceptions and what exception to be handled, that are easily readable. In 'if-else', we have one else block corresponding to one if block.