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How can we access objects in a Hash Map?

 
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I was being interviewed recently, where I was asked can we access object stored in a hashmap , if the key to that particular object stored in the HashMap is not known.
 
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The API allows you to retrieve all values from the Map. It also has a method to check whether a particular object is set as a value of the Map. Check java.util.Map.
 
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hi,

 
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