Why overridden method Cannot throw checked exception?

Why overridden method Cannot throw checked exception?

The rules are there so you don’t lose the original throws declaration by widening the specificity, as the polymorphism means you can invoke the overriden method on the superclass. The overriding method must NOT throw checked exceptions that are new or broader than those declared by the overridden method.

Can we remove throws clause of a method while overriding it?

According to the 3rd rule, if the super-class method throws certain exception, you can override it without throwing any exception.

Which of the following is the correct way of throwing exception by overriding methods?

Exception Handling with Method Overriding in Java

• If the superclass method does not declare an exception. If the superclass method does not declare an exception, subclass overridden method cannot declare the checked exception but it can declare unchecked exception.
• If the superclass method declares an exception.

Is superclass method throws an exception then overridden method of subclass can throw?

1 Answer. No, you cannot. The sub-class method cannot throw any checked exception not covered by the throws clause of the base super class method.

Which method Cannot be overridden in Java?

A method declared final cannot be overridden. A method declared static cannot be overridden but can be re-declared. If a method cannot be inherited, then it cannot be overridden.

Can a overriding method throw new or broader checked exception?

An overriding method can throw any unchecked exceptions, regardless of whether the overridden method throws exceptions or not. However, the overriding method should not throw checked exceptions that are new or broader than the ones declared by the overridden method.

Can we change an exception of a method with throws clause from checked to unchecked while overriding it?

But, when a method in superclass throws a checked exception the method the subclass method overriding can throw an unchecked exception.

What exceptions are automatically propagated?

unchecked exceptions are automatically propagated in java.

What are overridden methods in Java?

If subclass (child class) has the same method as declared in the parent class, it is known as method overriding in Java. In other words, If a subclass provides the specific implementation of the method that has been declared by one of its parent class, it is known as method overriding.

Can we throw exception in superclass and throw FileNotFoundException from subclass?

subclass can declare the subtype exception of the exception declared in the superclass method. Here in super class displayMsg() method throws IOException where as in subclass overridden displayMsg() method throws FileNotFoundException.

Can class throws an exception?

The Exception class is the superclass of all classes that represent recoverable exceptions. When exceptions are thrown, they may be caught by the application code. The exception class extends Throwable .

Which of the following Cannot overridden?

A final method cannot be overridden in its subclasses. A final class cannot be extended. A final class cannot extend other classes. A final method can be inherited.