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What is "ThreadLocal" in Java?

  • ThreadLocal class simplifies the development of thread-safe concurrent programs. 
  • It ensures the object stored in this class not shared between threads. 
  • It is as an alternative to synchronization, to improve scalablity in transaction-intensive environments. 
  • Classes encapsulated in ThreadLocal are automatically thread-safe in a pretty simple way, since it's clear that anything stored in ThreadLocal is not shared between threads.
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