What if catch block is empty?
Generally, the try block has the code which is capable of producing exceptions, if anything wrong in the try block, for instance, divide by zero, file not found, etc. The catch block catches and handles the exception. If the catch block is empty then we will have no idea what went wrong within our code.
What happens if exception occurs in Catch Block C#?
If your catch block throws an exception and there are no other catch blocks to handle it besides the one that caused it, it will continue to get re thrown then ‘Windows handles it’. If a exception occurs the CLR traverses up the call stack looking for a matching catch expression.
Which block of code will always be executed even if an exception does not occur?
The finally block always executes when the try block exits. This ensures that the finally block is executed even if an unexpected exception occurs.
Does finally run after catch?
The finally block on a try / catch / finally will always run — even if you bail early with an exception or a return .
Does finally execute if no exception is thrown?
Yes, the finally block will be executed even after a return statement in a method. The finally block will always execute even an exception occurred or not in Java. If we call the System.
What happens if exception is thrown in finally block?
If a finally block throws an exception what exactly happens ? That exception propagates out and up, and will (can) be handled at a higher level. Your finally block will not be completed beyond the point where the exception is thrown.
What is the difference between final finally and finalize?
Final class can’t be inherited, final method can’t be overridden and final variable value can’t be changed. Finally is used to place important code, it will be executed whether exception is handled or not. Finalize is used to perform clean up processing just before object is garbage collected. Finalize is a method.
Can finally block have return statement?
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 block to be discarded.
What will happen when catch and finally block both return value?
When catch and finally block both return value, method will ultimately return value returned by finally block irrespective of value returned by catch block. In above program, try block will “try”, but ultimately control will enter finally block to return “finally”.
Can we write code after finally block?
Anything after the finally block will not be executed. If you throw the exception on the catch block, or if you return something on your try block, it will execute the finally block. If not on the finally block (after try/catch/finally) it wont work.
Can we write return in finally block C#?
C# Does not allow you to put return statement in side finally block. Returning from inside a finally block will cause exceptions to be lost.
Can finally block be skipped?
The finally block follows a try block or a catch block. You cannot skip the execution of the final block. Still if you want to do it forcefully when an exception occurred, the only way is to call the System. exit(0) method, at the end of the catch block which is just before the finally block.
Is finally block necessary?
The finally block always executes when the try block exits. This ensures that the finally block is executed even if an unexpected exception occurs. But finally is useful for more than just exception handling — it allows the programmer to avoid having cleanup code accidentally bypassed by a return, continue, or break.
Can we handle exception in finally block?
Finally block is optional, as we have seen in previous tutorials that a try-catch block is sufficient for exception handling, however if you place a finally block then it will always run after the execution of try block. However if an exception occurs then the catch block is executed before finally block.
Can you throw an exception in a catch block?
When an exception is cached in a catch block, you can re-throw it using the throw keyword (which is used to throw the exception objects). Or, wrap it within a new exception and throw it.
Can a catch block throw exception caught by itself?
No — As Chris Jester-Young said, it will be thrown up to the next try-catch in the hierarchy. I would add that if you have trouble seeing what is going on, if you can’t reproduce the issue in the debugger, you can add a trace before re-throwing the new exception (with the good old System.
What happens when there is no suitable try block to handle exception?
A generic catch block can handle all the exceptions. Whether it is ArrayIndexOutOfBoundsException or ArithmeticException or NullPointerException or any other type of exception, this handles all of them. If no exception occurs in try block then the catch blocks are completely ignored.
What happens if we don’t handle exception?
if you don’t handle exceptions When an exception occurred, if you don’t handle it, the program terminates abruptly and the code past the line that caused the exception will not get executed.
What happens if you don’t catch an 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.