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Why ArrayList class is not a synchronized class and why it
is not a thread safe class? explain
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Answer / atre sachin
If multiple threads access an ArrayList instance concurrently, and at least one of the threads modifies the list structurally, it must be synchronized externally. (A structural modification is any operation that adds or deletes one or more elements, or explicitly resizes the backing array; merely setting the value of an element is not a structural modification.)
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