What’S An Exception Give Example?

What is meant by exception?

The term exception is shorthand for the phrase “exceptional event” and can be defined as follows: Definition: An exception is an event that occurs during the execution of a program that disrupts the normal flow of instructions..

Is ClassNotFoundException checked exception?

ClassNotFoundException is a checked exception which occurs when an application tries to load a class through its fully-qualified name and can not find its definition on the classpath. This occurs mainly when trying to load classes using Class. forName(), ClassLoader.

Should I use checked or unchecked exception?

When to Use Checked Exceptions and Unchecked Exceptions “If a client can reasonably be expected to recover from an exception, make it a checked exception. If a client cannot do anything to recover from the exception, make it an unchecked exception.”

How do you create an exception?

Steps to create a Custom Exception with an Example Create one local variable message to store the exception message locally in the class object. We are passing a string argument to the constructor of the custom exception object. The constructor set the argument string to the private string message.

How do you create an exception class?

Here are the steps:Create a new class whose name should end with Exception like ClassNameException. … Make the class extends one of the exceptions which are subtypes of the java. … Create a constructor with a String parameter which is the detail message of the exception.

What is an example of checked exception?

Checked exceptions are subclasses of Exception class. Example of checked exceptions are : ClassNotFoundException, IOException, SQLException and so on.

What are the types of exception?

Types of Exception in Java with ExamplesArithmeticException. It is thrown when an exceptional condition has occurred in an arithmetic operation.ArrayIndexOutOfBoundsException. … ClassNotFoundException. … FileNotFoundException. … IOException. … InterruptedException. … NoSuchFieldException. … NoSuchMethodException.More items…•

What is exception and types of exception?

Exceptions are events that occur during the execution of programs that disrupt the normal flow of instructions (e.g. divide by zero, array access out of bound, etc.). In Java, an exception is an object that wraps an error event that occurred within a method and contains: Information about the error including its type.

How do I create an unchecked exception?

We can create the custom unchecked exception by extending the RuntimeException in Java. Unchecked exceptions inherit from the Error class or the RuntimeException class.