java finally block and checked exceptions

Question

If I have the following code

try {
    //some stuff here
catch (Exception e) {
    throw new CustomException();
} finally {
    finalize();
}

where CustomException is a checked exception,

Will the finally block be called in the event of an Exception?

EDIT: Perhaps "finalize()" was a poor choice of wording. I DID NOT mean the finalize() method of Object. I just meant that there was cleanup code that needed done. Apologies for that.

Yes, but you'll have to either catch the `CustomException` or declare it as being thrown from the enclosing method. — superEb, Oct 31 '13 at 15:18
@SJuan76 Almost always. Java could crash before it's called... — Shaded, Oct 31 '13 at 15:19
@Shaded Or someone could pull the plug from the computer, or a volcano might erupt and bury the computer under lava before the statement is reached etc... — Jesper, Oct 31 '13 at 15:35
@Jesper Exactly! At least I'm not alone in believing volcanos are out to get me. — Shaded, Oct 31 '13 at 15:43
Though you should never invoke `finalize()` on an object anyway. In most cases you don’t need a `finalize()` method but if you need it, it will be called by the JVM automatically. Invoking it by yourself means risking `finalize()` beeing called twice, once by your code and once by the JVM. — Holger, Oct 31 '13 at 16:48
possible duplicate of [Does finally always execute in Java?](http://stackoverflow.com/questions/65035/does-finally-always-execute-in-java) — Dennis Meng, Oct 31 '13 at 20:27

score 2 · Answer 1 · answered Oct 31 '13 at 15:18

2

Finally is ALWAYS called, regardless of exceptions and even return statements.

I recommend checking the Documentation on it.

answered Oct 31 '13 at 15:18

Andrew Schuster

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score 1 · Answer 2 · answered Oct 31 '13 at 15:18

1

It will always be called in the event of an exception. For that matter, it will always be called, period. That's what it's for.

answered Oct 31 '13 at 15:18

MadConan

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score 1 · Answer 3 · answered Oct 31 '13 at 15:19

1

finally is always called(even if you call return;), unless you call

System.exit();

in try or catch block.

answered Oct 31 '13 at 15:19

John

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score 0 · Answer 4 · answered Oct 31 '13 at 15:18

0

finally block is called in each cases.

answered Oct 31 '13 at 15:18

k4sia

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score 0 · Answer 5 · answered Oct 31 '13 at 15:22

0

The finally block is always executed. It is designed so that you can perform important operations regardless of any exceptions being thrown, for example close streams.

answered Oct 31 '13 at 15:22

Blady

1

score 0 · Answer 6 · answered Oct 31 '13 at 15:22

Yes, finally is ALWAYS executed, no matter what happens, short of the JVM dying before your code is reached. It will even get called in this case:

public boolean doSomething() throws Exception{
    boolean iDidIt = true;
    try{
        //attempt to do it
        return iDidIt;
    catch(Exception e){
        iDidIt = false;
        return iDidIt;
    } finally {
        System.out.println("Did something get done? "+iDidIt);
    }
}

The print statement will get printed no matter what.

java finally block and checked exceptions

6 Answers6