The ThreadLocal class provides thread-local variables, meaning each thread has its own independent copy of the variable. This ensures that the value of the variable is not shared between threads, helping to avoid synchronization issues.

  • Usage: It’s commonly used for managing data that is specific to a thread, such as user sessions, database connections, or temporary buffers.
  • Behavior: Each thread that accesses the ThreadLocal variable gets its own copy, preventing conflicts or race conditions in multi-threaded environments.

In summary, ThreadLocal is used to store data that should be local to the thread and not shared among multiple threads.