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dibblego's profile
Tony Morris
Tony Morris
Tony Morris
@dibblego

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Tony Morris

@dibblego

Power ∧ Attitude ⇒ Performance

Brisbane, Australia
tmorris.net
Joined May 2009

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    1. Tony Morris‏ @dibblego 29 Aug 2016

      What is the output of this #java program? https://gist.github.com/tonymorris/f092b78def29a2437fd1699afb88fdf5 … #composeconf

      6 replies 14 retweets 20 likes
    2. Edgar‏ @EdgarArout 29 Aug 2016
      Replying to @dibblego

      is it naive to say b)?

      1 reply 0 retweets 0 likes
    3. Tony Morris‏ @dibblego 29 Aug 2016
      Replying to @EdgarArout

      It's very common, at least. FYI, I wrote this code in ~2004.

      1 reply 0 retweets 0 likes
    4. Edgar‏ @EdgarArout 29 Aug 2016
      Replying to @dibblego

      what's the answer though, explanation.

      1 reply 0 retweets 0 likes
    5. Tony Morris‏ @dibblego 29 Aug 2016
      Replying to @EdgarArout

      The answer is in the vmspec.

      1 reply 0 retweets 0 likes
    6. Edgar‏ @EdgarArout 29 Aug 2016
      Replying to @dibblego

      meaning to say implementation defined? What would the JVM spit out?

      1 reply 0 retweets 0 likes
    7. Tony Morris‏ @dibblego 29 Aug 2016
      Replying to @EdgarArout

      any JVM that is compliant with the vmspec will produce the same answer.

      1 reply 0 retweets 0 likes
    8. Edgar‏ @EdgarArout 29 Aug 2016
      Replying to @dibblego

      Okay, so without checking the VMspec, can you tell me what the correct answer is? I want to share with my friends.

      1 reply 0 retweets 0 likes
    9. Tony Morris‏ @dibblego 29 Aug 2016
      Replying to @EdgarArout

      e)

      1 reply 0 retweets 0 likes
    10. Edgar‏ @EdgarArout 29 Aug 2016
      Replying to @dibblego

      wow unexpected. I guess I can only find out conclusively by running the code. Something to read that explains why?

      1 reply 0 retweets 0 likes
      Tony Morris‏ @dibblego 29 Aug 2016
      Replying to @EdgarArout

      https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-5.html#jvms-5.5 …

      6:10 AM - 29 Aug 2016
      2 replies 0 retweets 0 likes
        1. Per Weinberger‏ @joxzaren 29 Aug 2016
          Replying to @dibblego

          But if x were static the output would be 2.

          0 replies 0 retweets 1 like
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        1. @reynir@bsd.network‏ @Reynir_ 29 Aug 2016
          Replying to @dibblego @EdgarArout

          It's in the JLS spec (point 3) https://docs.oracle.com/javase/specs/jls/se8/html/jls-12.html#jls-12.5 … with stack trace https://gist.github.com/reynir/f8c341eaf7a49722b1388bf0fccb7806 …

          3 replies 0 retweets 2 likes
        2. @reynir@bsd.network‏ @Reynir_ 29 Aug 2016
          Replying to @Reynir_ @dibblego @EdgarArout

          short version: first init all with zero, then implicit call to super(), then instance initializers, finally ctr body

          0 replies 0 retweets 2 likes
          3. End of conversation

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