In what situations does automatic resource or connection closing occur?

Automatic closing of resources or connections occurs in several situations:

• When using the try-with-resources statement in Java, where an object implementing the AutoCloseable interface is automatically closed after exiting the block.

try (BufferedReader br = new BufferedReader(new FileReader("file.txt"))) {
    String line = br.readLine();
}
// br is automatically closed here

• In some libraries and frameworks, resources may be automatically closed when they are no longer in use, for example, when closing a database session or completing a transaction.

• When an application or thread terminates, if resources have not been explicitly closed, finalizers or cleanup mechanisms may trigger, but relying on this is not recommended.

• In Android, for example, the lifecycle of components can lead to automatic resource release when an Activity or Service is destroyed.

It is always better to explicitly close resources to avoid leaks.