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How remove(key) method works in HashMap

I want to kwo the usage of remove(key) method in java.
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Its a long story to make you explain the detailed on this.And no doubt that, This is one of the new hottest  technical java interview  question, how remove method works  internally in hashmap or explain the internal implementation of remove method in hashmap. By asuming and understanding your question I hope you are looking for something like, http://javatutorialhq.com/java/util/hashmap-class/remove-method-example/

Which may help you for detail understanding.

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