Can you store multiple strings in a single Map entry in Java?

Storing Multiple Strings in a Map

Question: Can you store more than one string value in a single Map entry? For instance, consider the map:

<code class="java">Map<String, String, String, String> myMap;</code>

Can you associate each key with multiple values, such as number, name, address, and phone, and retrieve them together?

Answer:

Creating a map with multiple string values for a single key is not directly possible in Java. Maps are structured to associate a single value with each key.

Solution:

To achieve your desired functionality, you should create a custom object to represent the collection of data associated with each key. For your example, you could define a ContactInformation class containing properties for number, name, address, and phone.

Then, instead of storing multiple string values in the map, you would store the ContactInformation object:

<code class="java">Map<String, ContactInformation> myMap;</code>

Each key in the map would now associate with a single ContactInformation object, containing the multiple string values you require.

This solution allows you to group related data into a single object, ensuring that the values are retrieved together and maintaining a well-structured and type-safe design.

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