Challenge 3: try-with-resources Closing Even When an Exception Is Thrown — Possible Solution
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NoisyResource.java:

public class NoisyResource implements AutoCloseable {
    @Override
    public void close() {
        System.out.println("close() called.");
    }
}

TryWithResourcesDemo.java:

public class TryWithResourcesDemo {
    public static void main(String[] args) {
        try (NoisyResource r = new NoisyResource()) {
            System.out.println("Inside the try block.");
            throw new RuntimeException("Something went wrong!");
        } catch (RuntimeException e) {
            System.out.println("Caught: " + e.getMessage());
        }
    }
}

Output:

    Inside the try block.
    close() called.
    Caught: Something went wrong!

Explanation:
NoisyResource implements AutoCloseable, so declaring it inside
try(...) makes Java call its close() method automatically once the
try block exits -- by normal completion OR by an exception. Here the
try block throws a RuntimeException before reaching its end, but
close() still runs first, BEFORE the exception propagates out to the
surrounding catch block.

WHY THIS WORKS AS AN ANSWER
------------------------------
This demonstrates the chapter's own claim that try-with-resources
calls close() automatically "even if an exception was thrown above" --
the output order (close() printed before the catch block's message)
proves cleanup happens during the try block's exit, not after the
exception is already being handled elsewhere.