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Chapter 18: Problem 31

What part of a mapping does the HashMap store by its hash code?

Short Answer

Expert verified
Answer: The "key" part in the key-value pair.

Step by step solution

01

Understanding HashMaps

A HashMap is a data structure that allows you to store key-value pairs, where each key is unique. It utilizes an internal hashing function which assigns a hash code to each key. The hash code is an integer value calculated from the key and is used as an index in the underlying data structure, called an array or a table, to efficiently store and retrieve the corresponding values.
02

HashMap and Hash Codes

When using a HashMap, the hash code is generated from the key and is then used to determine the index where the key-value pair should be stored. The HashMap stores the part of a mapping by its hash code as the "key" in the key-value pair.
03

Conclusion

In conclusion, the part of a mapping that a HashMap stores by its hash code is the "key" part in the key-value pair. The hash code is generated from the key and used to determine where to store and access the corresponding value.

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Most popular questions from this chapter

Why is it a common practice to use an interface variable to reference a collection object?

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