Answers for "if hashmap contains only one key then how to get that key"

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if hashmap contains only one key then how to get that key

HashMap<Node, Integer> x = qu.remove();	
// This "qu" is a queue which is returning a Hashmap
// of type HashMap<Node, Integer> this hashmap contains
// only one key,value pair
Node node = x.keySet().iterator().next();
// here we are extracting that "KEY" of hashMap into variable of Node type

Posted by: Guest on July-22-2021

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