When program execution enters a try block that has a finally block, the finally block always executes, regardless of whether the try block (or any associated catch blocks) execute to completion. Statements that cause the finally block to terminate abruptly also cause the try block to terminate abruptly, and consequently mask any exception thrown from the try or catch blocks (JLS 205, Section 14.20.2, Execution of try-catch-finally2005).
Never use return, break, continue or throw statements within a finally block.
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