Here are a few question-based titles that fit your article: * **How Can We Store Multiple Values for a Single Key in a Java HashMap?** * **Retrieving a Specific Value from Multiple Values Associated

HashMap: Retrieving Multiple Values for a Single Key

In Java, HashMap is a widely used data structure that stores key-value pairs. Typically, a key is associated with a single value. However, scenarios may arise where you require the retrieval of multiple values for a given key. This article explores whether this is feasible and provides a solution.

Can we obtain the third value associated with the first key in a HashMap? Yes, it is possible.

To achieve this, we can leverage libraries specifically designed for handling such situations. However, a straightforward solution using plain Java is to construct a Map of Lists. This involves creating a HashMap where the values are ArrayLists. Here's an example:

<code class="java">Map<Object, ArrayList<Object>> multiMap = new HashMap<>();</code>

This approach allows you to store multiple values for a single key. To insert values, simply add them to the corresponding ArrayList within the multiMap. To retrieve values, you can use the key to access the ArrayList and retrieve the desired value at the specified index.

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