Finally Block

What is the use of the finally block? Is finally block in Java guaranteed to be called? When finally block is NOT called?

• The finally block always executes when the try block exits. 
• This ensures that the finally block is executed even if an unexpected exception occurs. 
• But finally is useful for more than just exception handling — it allows having cleanup code accidentally bypassed by a return, continue, or break. 
• Putting cleanup code in a finally block is always a good practice, even when no exceptions are anticipated.

• If the JVM exits while the try or catch code is being executed, then the finally block may not execute. 
• Likewise, if the thread executing the try or catch code is interrupted or killed, the finally block may not execute even though the application as a whole continues.