Machine-translated by Google. Questions are authored in English.
Top

Discussion

Which of these types is NOT declared in java.lang?

  • A.ThreadLocal
  • B.ExecutorService
  • C.Thread
  • D.Runnable

Answer: B

ExecutorService lives in java.util.concurrent and needs an import. Thread, Runnable and ThreadLocal are all in java.lang, which is imported implicitly, which is why thread code compiles with no import at all until the concurrency utilities are used.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.