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c#javatry-catchusing-statementtry-catch-finally

How should I replicate the functionality of C#'s 'using' statement in Java?

I'm converting some C# code to Java and it contains the using statement. How should I replicate this functionality in Java? I was going to use a try, catch, finally block but I thought I'd check with you guys first.

Solution

  • The standard idiom for resource handling in Java is:

    final Resource resource = acquire();
try {
    use(resource);
} finally {
    resource.dispose();
}

    Common mistakes include trying to share the same try statement with exception catching and following on from that making a mess with nulls and such.

    The Execute Around Idiom can extract constructs like this, although the Java syntax is verbose.

    executeWith(new Handler() { public void use(Resource resource) {
    ...
}});