What can replace TreeMap?

Question

Java

Hello, tell me, is there a TreeMap replacement that allows you to store key-value data with several identical keys?
For example, C++ has multimap for this.

Answer 1

Multiple values ​​for the same key?
What's stopping you from doing this:
Another option is to use
guava multimap

<dependency>
    <groupId>com.google.guava</groupId>
    <artifactId>guava</artifactId>
    <version>19.0</version>
</dependency>