What is the role of unchecked exceptions in error handling in Java?

In Java, exceptions are divided into checked and unchecked.

Unchecked exceptions — subclasses of RuntimeException and Error. They do not require mandatory catching or declaration in the method signature.

The role of unchecked exceptions in error management:

• They signal programming errors that are usually not handled explicitly (e.g., NullPointerException, ArrayIndexOutOfBoundsException).
• They allow avoiding cluttering error handling code that makes no sense or cannot be fixed on the spot.
• They serve to identify runtime errors typically related to program logic.

Example:

public void process(String input) {
    // If input == null, NullPointerException (unchecked) will be thrown
    System.out.println(input.length());
}

Here, there is no need to declare or handle NullPointerException as it is unchecked.