I want to find out the key for given value from HashMap, currently I have to go through all keys and check its value in map, is there a faster way?
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I want to find out the key for given value from HashMap, currently I have to go through all keys and check its value in map, is there a faster way?
No, there is not a faster way (without introducing other data structures). If you need to do this often, reconsider your design. Maybe you want another
HashMapwhose keys are the values of the otherHashMap?