What is the behavior of the program if an exception occurs in the finally block?

If a finally block in Java throws an exception, this exception "overrides" (replaces) any exception that might have been thrown in the try or catch blocks.

That is:

• If an exception was thrown in try or catch, but an exception also occurs in finally, then the exception from finally will be propagated further.
• The previous exception from try or catch is lost (it will not be propagated).

Example:

try {
    throw new Exception("Exception from try");
} catch (Exception e) {
    System.out.println("Handling exception");
} finally {
    throw new RuntimeException("Exception from finally");
}

In this case, the program will throw a RuntimeException from finally, and the exception from try will be lost.

Therefore, it is recommended to avoid throwing exceptions from finally or handle them carefully.