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How To Create An Exception In Java

Last Updated : Jul 1, 2023

How To Create An Exception In Java

In this article we will show you the solution of how to create an exception in java, create our own exceptions by deriving them from Java Exception class.

Our own exceptions, commonly referred to those as user-defined or custom exceptions, are made by us.

Java customised exceptions are essentially used to modify the exception to meet user needs.

Here, a string that can be acquired using the getMessage() function just on object we generated has been provided to the function Object() { [native code] } of the superclass, the Exception class.

Nearly all of the common sorts of programming exceptions are covered by Java exceptions. But occasionally we have to make our own exceptions.

Following are few of the reasons to use custom exceptions:

  • To detect a subset of current Java exceptions and provide them particular treatment.
  • Exceptions to business logic These are the business logic and process exceptions. Understanding the precise issue is helpful for both app users and developers.

A problem (run time error) which happened while a programme was being executed is an exception.

Whenever an exception occurs, the programme ends suddenly and the code that follows the line that generated the exception is not ever executed.

As derived classes of Exception, Java gives us the ability to define custom exceptions.

A customized excuse letter user-defined exception is one we create on our own.

In essence, Java custom exceptions can be used to tailor the exception to user requirements.

A User-Defined Exception, often known as a custom exception, is simply a customized exception class that you create and then toss using the keyword "throw."

Step By Step Guide On How To Create An Exception In Java :-

class TalkersCode extends Exception {
    public MyException(String s)
    {
        super(s);
    }
}
public class Main {
    public static void main(String args[])
    {
        try {
            throw new MyException("GeeksGeeks");
        }
        catch (MyException ex) {
            System.out.println("Caught");
            System.out.println(ex.getMessage());
        }
    }
}
  1. First we define a class that represents a user-defined exception.
  2. Next, we call the parent exception's function Object() { [native code] }.
  3. Then Class that uses the above MyException.
  4. After that Throw an object of the user-defined exception
  5. Then Print the message from the MyException object.

Conclusion :-

As derived classes of Exception, Java gives us the ability to define custom exceptions.

A customized excuse letter user-defined exception is one we create on our own.

In essence, Java custom exceptions can be used to tailor the exception to user requirements.

A User-Defined Exception, often known as a custom exception, is simply a customized exception class that you create and then toss using the keyword "throw."

I hope this article on how to create an exception in java helps you and the steps and method mentioned above are easy to follow and implement.