Why null pointer is a unchecked exception?

NullPointerException is a RuntimeException. In Java, a special null value can be assigned to an object reference. NullPointerException is thrown when program attempts to use an object reference that has the null value.

What type of exception is NullPointerException?

NullPointerException is a runtime exception in Java that occurs when a variable is accessed which is not pointing to any object and refers to nothing or null. Since the NullPointerException is a runtime exception, it doesn’t need to be caught and handled explicitly in application code.

How can you tell if an exception is checked or unchecked?

checked exception is checked by the compiler and as a programmer you have to handle it using try-catch-finally , throws.
unchecked exception is not checked by the compiler but you optionally can manage it explicitly.

Is it good practice to throw NullPointerException?

It is true that NullPointerException means that I have forgotten to check something. But when it is directly thrown by a method the bug is actually there if it is forbidden to pass in null . So the only good way is to throw NPE.

Is ArrayIndexOutofBoundsException checked or unchecked?

unchecked exception
ArrayIndexOutofBoundsException is an unchecked exception. Therefore, the java compiler will not check if a given block of code throws it.

What is the difference between a checked exception and an unchecked exception in Java?

Difference between Checked and Unchecked Exception Checked Exceptions are checked at runtime of the program, while Unchecked Exceptions are checked at the compile time of the program. Checked Exceptions and Unchecked Exceptions both can be created manually.

Why FileNotFoundException is checked exception?

2.2. FileNotFoundException is a checked exception in Java. Anytime, we want to read a file from the filesystem, Java forces us to handle an error situation where the file may not be present in the place. In above case, you will get compile time error with message – Unhandled exception type FileNotFoundException .

How do I overcome null pointer 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.

Which are checked exceptions?

Checked exceptions are the subclass of the Exception class. These types of exceptions occur during the compile time of the program. ClassNotFoundException, IOException, SQLException etc are the examples of the checked exceptions.