Web Reference: We can get the value of an element by specifying its key of it in the get () method. Keys are unique but values can be repeated. The value of a key can also be updated. In a map, keys are in a... Jan 7, 2026 · In Java, the Map Interface is part of the java.util package and represents a collection of key-value pairs, where Keys should be unique, but values can be duplicated. Since HashMap implements the Map interface, this is possible. It works the same way, but some developers prefer this style because it gives them more flexibility to change the type later.
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