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Why string is popular hashmap key in java?

Question Posted / mudit joshi


Why string is popular hashmap key in java?..

Answer / vishalshetkar

Since String is immutable, its hashcode is cached at the time of creation and it doesn’t need to be calculated again. This makes it a great candidate for keys in a Map and its processing is fast than other HashMap key objects. This is why String is mostly used Object as HashMap keys.

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