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Should I throw NPE?
NPE = someone made error in code here, IllegalArgumentException = the object given to the method is invalid. other illegal uses of the null object. So throwing NPE would be legal, however it’s not the common practice, so I would recommend IllegalArgumentException .
Can we use NullPointerException in throws?
NullPointerException is thrown when program attempts to use an object reference that has the null value. Taking the length of null, as if it were an array. Accessing or modifying the slots of null object, as if it were an array. Throwing null, as if it were a Throwable value.
What happens if you don’t do a null reference check?
If you don’t do a null reference check (or throw a unchecked exception), it might throw a unchecked NullReferenceException, which usually is not handled by the user of the method and even might shut down the application. This means that the function is obviously completely misunderstood and therefore the application is faulty.
How to deal with Nullpointer exception in C #?
You have three general ways to deal with the problem in this situation: Don’t bother checking, and just let the runtime throw the nullpointer exception. Check, and throw an exception with a message better than the basic NPE message. A third solution is more work but is much more robust:
When to check for null in a function?
If not checking for null causes the program to instantly explode, fine, but if it instead quietly corrupts the data to cause trouble down the road, then it’s best to check and deal with it right then and there. Since _someEntity can be modified at any stage, then it makes sense to test it every time that SetName is called.
How to deal with null pointer / reference errors?
Null pointer/reference errors, more often than not, are programmer errors. Programmer errors are often best dealt with by failing immediately and loudly. You have three general ways to deal with the problem in this situation: Don’t bother checking, and just let the runtime throw the nullpointer exception.