Antwort Is it OK to throw exception in catch? Weitere Antworten – Should I throw exception in catch

Is it OK to throw exception in catch?
If method can't handle the exception properly you should throw it. You generally throws an exception when you want to notify the caller of the method of some failures. As others have said, as a general rule, you should catch an exception when you can actually handle it, otherwise, just throw it.If you need to add additional information, you should catch the exception and wrap it in a custom one. But make sure to follow best practice number 9. So, only catch an exception if you want to handle it. Otherwise, specify it in the method signature and let the caller take care of it.The code in the try block is executed first, and if it throws an exception, the code in the catch block will be executed. The code in the finally block will always be executed before control flow exits the entire construct.

Is it good practice to throw exception : It is good programming practice to avoid this usage where possible. If null is a reasonable value for the stated purpose of a method, or if a method is expected to fail often in the normal course of operation, then it is reasonable to return null to indicate failure; otherwise it is better to throw an exception.

When should you not catch exceptions

  1. Do not use try-catch unless you actually can handle specific exceptions.
  2. If you need to catch general exceptions, always rethrow them.
  3. 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.

Is it better to use throws or try-catch : 🔴 Choosing Between Try-Catch and Throws:

👉 Use try-catch when you want to handle exceptions immediately within the current block of code. 👉 Use throws when you want to delegate the responsibility of handling exceptions to the calling method.

Exceptions are a rare event, so the normal program shouldn't pay for them. Also, exceptions from anything other than error conditions are quite confusing to the user of your class or function.

The catch block catches and handles the try block exceptions by declaring the type of exception within the parameter. The catch block includes the code and it is executed if an exception inside the try block occurs. The catch block is where you handle the exceptions; so this block must be follow the try block.

Is throwing exceptions slow

When a member throws an exception, its performance can be orders of magnitude slower. However, it is possible to achieve good performance while strictly adhering to the exception guidelines that disallow using error codes.This isn't bad practice. If your constructor knows that a certain parameter is completely invalid, then it should throw an exception.An Exception for me is something that cannot be handled or expected, so you're obligated to halt all the code flow and throw something. If you know that an entity might not pass the validation tests, you should not throw an exception.

Try-catch is best used in parts of your code when you think mistakes will occur that are out of your control for whatever reason. 2. When Should You Avoid Using Try-Catch If you know an error is likely to happen, you shouldn't use the try-catch statement since you'd rather debug the problem than disguise it.

When should you avoid try-catch :

  1. Do not use try-catch unless you actually can handle specific exceptions.
  2. If you need to catch general exceptions, always rethrow them.
  3. 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.

Should I avoid throwing exceptions : You should only use exceptions for exceptional situations. An exceptional situation is an unexpected situation that is out of the ordinary. A situation is not exceptional just because it's less common than other situations. In a non-exceptional situation you should use return values instead of exceptions.

Can I catch two exceptions

In Java, you can catch multiple exceptions in a single catch block by specifying multiple exception types separated by a vertical bar ( | ), also known as the "or" operator. For example: Copy codetry { // code that might throw an exception.

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.An exception can be rethrown in a catch block using throw keyword, if catch block is unable to handle it. This process is called as re-throwing an exception. Rethrowing an exception causes it to go to the exception handlers in the nexthigher context. Any further catch clauses for the same try block are still ignored.

Is it good practice to catch unchecked exception in Java : As you know checked exceptions are one which can be caught during compiling your code and can be handled at the compiler level. but in case of unchecked exception compiler don't checks it when it compiles your code means you can leave it.