as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
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explain the difference between hashmap and treemap in java
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hashmap is a map implementation that stores objects in a hash table based on a key. it allows null values. treemap is a map implementation that stores objects in a tree structure based on their keys. it does not allow null values.
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