Thursday, January 25, 2007

rule#55@try-catch-finally execution order--suspension

"exit-type statements (exit, return, break or continue.... ) in a catch{} are /suspended/ until finally runs its course."

think of catch{} as a naughty kid. jvm will let catch{} run its course right before catch{} attempts to exit the try-catch-finally. At that point, finally{} takes over. As a good care-taker, finally{} usually [1] keeps the "exit-plan" of catch{}.

[1] see other posts on this execution order.

Q: How about a throw instead of an exit-type?
A: "If a try block throws an exception and the catch block propagates the exception (throws it again), the finally clause will still execute. If the finally clause executes a return statement, it overides (covers up) a thrown exception so the exception will not be thrown; instead the return will occur."

A: look at the java precisely example 90


Q: what if finally /attempts to/ override that exit-type statement?
A: it will prevail.

A: look at the java precisely example 90

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