What does exception null mean?

Essentially, this means the object reference does not point anywhere and has a null value. Some of the most common scenarios for a NullPointerException are: Calling methods on a null object.

How do I fix null point exception?

NullPointerException is thrown when a reference variable is accessed (or de-referenced) and is not pointing to any object. This error can be resolved by using a try-catch block or an if-else condition to check if a reference variable is null before dereferencing it.

Can an exception be null?

Chances are it’s not the exception that’s null but the compiler might be optimising out some of the rest of the code which causes your exception to appear elsewhere. You need to run the codes inside the catch statement to reference the exception to ex.

Can exception be null in catch block?

What is up with ReflectionTypeLoadException catch block? Embarrassingly the exception is not null and it cannot be null per the C# standard 15.9.

Should you ever catch a NullPointerException?

NullPointerException typically occurs due to logical errors in our code. We can eliminate NullPointerException by avoiding unsafe operations. If any NullPointerException still happens, you can see it in StackTrace . Generally It is recommend that one should not catch NullPointerException and let it be handled by JVM.

Which of the following are checked exceptions?

Checked Exceptions For example, the constructor of FileInputStream throws FileNotFoundException if the input file does not exist. Java verifies checked exceptions at compile-time. Some common checked exceptions in Java are IOException, SQLException and ParseException.

What is Exception explain its keyword with example?

All exception and errors types are sub classes of class Throwable, which is base class of hierarchy. One branch is headed by Exception. This class is used for exceptional conditions that user programs should catch. NullPointerException is an example of such an exception.

Why is it bad to throw exceptions?

Specifying an Exception or Throwable makes it almost impossible to handle them properly when calling your method. The only information the caller of your method gets is that something might go wrong. The unspecific throws clause hides all changes to the exceptions that a caller has to expect and handle.