Thread safety of static blocks in Java

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If the first thread hasn’t finished initializing SomeClass, the second thread will block.

This is detailed in the Java Language Specification in section 12.4.2.

Related Contents:

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  2. Are non-synchronised static methods thread safe if they don’t modify static class variables?
  3. Are Java static initializers thread safe?
  4. Are static variables shared between threads?
  5. Running code in main thread from another thread
  6. What does java.lang.Thread.interrupt() do?
  7. What’s the difference between Thread start() and Runnable run()
  8. Why would a static nested interface be used in Java?
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  10. How to catch an Exception from a thread
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  14. Why is a static method considered a method?
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  18. Why should Java ThreadLocal variables be static
  19. How to start two threads at “exactly” the same time
  20. Green Threads vs Non Green Threads
  21. Is a HashMap thread-safe for different keys?
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  24. Simplest and understandable example of volatile keyword in Java
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  35. Java Synchronized list
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  39. ReentrantReadWriteLock: what’s the difference between ReadLock and WriteLock?
  40. Mock static java methods using Mockk
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