What is the problem with checked exceptions in Java?

The main problem with checked exceptions (Checked Exceptions) is their overuse and the requirement to handle or declare them at every call site of a method that can throw such an exception. This leads to:

• Verbosity of code: The code becomes more cumbersome due to numerous try-catch blocks or throws declarations in method signatures, even if exception handling is not a meaningful part of the method's logic.
• Violation of encapsulation: Changing what exceptions a method throws requires modifying the signatures of all calling methods, creating cascading changes in the codebase.
• "Swallowing" exceptions: Developers often handle checked exceptions with empty catch blocks or simply log them, without taking meaningful actions, which hides real problems.
• API evolution complexity: Adding a new checked exception to an existing method requires changes throughout the code that uses it, complicating the development of libraries and frameworks.
• Mismatch with some design patterns: In some cases, such as when implementing functional interfaces or using lambda expressions, working with checked exceptions becomes extremely inconvenient.

In modern Java development approaches, there is often a preference for unchecked exceptions (Unchecked Exceptions) or using Optional to represent possible errors, especially for errors that cannot be reasonably recovered at the call site.