"Volatile" keyword ensures the following
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the value keeps refreshing after some intervals of time
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the value is made thread safe automatically
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the value is not cached by the compiler for the purpose of optimization
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to make the value of a variable to be refreshed, everytime it is accessed
The volatile keyword in Java indicates that a variable may be modified by multiple threads. It prevents the compiler from caching the variable in CPU registers, ensuring reads and writes go directly to main memory for visibility. However, volatile does NOT provide full thread safety - compound actions still need synchronization.
The volatile keyword tells the compiler not to cache a variable's value in a register or apply optimizations that assume the value is stable — every read must go back to memory, since the value may change unexpectedly (e.g., via another thread or hardware). It does not make access automatically thread-safe (that requires proper synchronization) nor does it cause periodic refreshing on a timer; it simply disables compiler caching/optimization assumptions.