What does Java Lang ExceptionInInitializerError mean?

The ExceptionInInitializerError indicates that an unexpected exception has occurred in a static initializer. Basically, when we see this exception, we should know that Java failed to evaluate a static initializer block or to instantiate a static variable.

How do I stop Java Lang ExceptionInInitializerError?

We can resolve the java. lang. ExceptionInInitializerError by ensuring that static initializer block of classes does not throw any Runtime Exception. We can resolve also resolve this exception by ensuring that the initializing static variable of classes also doesn’t throw any Runtime Exception.

What is ExceptionInInitializerError?

An ExceptionInInitializerError is thrown to indicate that an exception occurred during evaluation of a static initializer or the initializer for a static variable. As of release 1.4, this exception has been retrofitted to conform to the general purpose exception-chaining mechanism.

What is a Java Lang RuntimeException?

lang. RuntimeException is the superclass of those exceptions that can be thrown during the normal operation of the Java Virtual Machine. … A method is not required to declare in its throws clause any subclasses of RuntimeException that might be thrown during the execution of the method but not caught.

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Which exception is thrown when JVM tries to initialize a static variable?

ExceptionInInitializerError is thrown. So, we can catch ExceptionInInitializerError and handle exception thrown from static block in java. We will create simple program to understand how RuntimeException occured in static initialization block of class can throw ExceptionInInitializerError and how to handle it.

What does static mean in Java?

In the Java programming language, the keyword static means that the particular member belongs to a type itself, rather than to an instance of that type. This means we’ll create only one instance of that static member that is shared across all instances of the class.

Is IllegalStateException a checked exception?

IllegalStateException is the child class of RuntimeException and hence it is an unchecked exception.

Which exception or error is thrown if there is a problem when the JVM tries to initialise a static variable or run code of a static initialisation block?

Which exception or error is thrown if there is a problem when the JVM tries to initialize a static variable or run code of a static initialization block? Explanation: Besides options b) and d), no other errors or exceptions exist as part of the standard Java classes. AssertionError is thrown in case an assertion fails.

Is it a good practice to catch a RuntimeException?

Generally speaking, do not throw a RuntimeException or create a subclass of RuntimeException simply because you don’t want to be bothered with specifying the exceptions your methods can throw. … If a client cannot do anything to recover from the exception, make it an unchecked exception.

Is RuntimeException a checked exception?

Run-time exception is called unchecked exception since it’s not checked during compile time. Everything under throwable except ERROR and RuntimeException are checked exception.

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Should you extend RuntimeException?

If you extend Exception, you do (it’s a checked exception). Some people argue that all exceptions should extend from RuntimeException , but if you want to force the user to handle the exception, you should extend Exception instead.

Can I throw exception from static block?

A static block can throw only a RunTimeException, or there should be a try and catch block to catch a checked exception. A static block occurs when a class is loaded by a class loader. … Trying to throw a checked exception from a static block is also not possible.

Why do we use static block in Java?

The static block is a block of statement inside a Java class that will be executed when a class is first loaded into the JVM. A static block helps to initialize the static data members, just like constructors help to initialize instance members.

What does static block mean in Java?

In a Java class, a static block is a set of instructions that is run only once when a class is loaded into memory. A static block is also called a static initialization block. This is because it is an option for initializing or setting up the class at run-time.