Multiple Values Per Key in Java Maps Example

Struggling to find a way to put multiple values per key in a Java map? This example tutorial demonstrates three separate ways to create Java collection classes that allow multiple values per key. Here's a write up of the steps in TSS:

One pure JDK APIs approach is to creatively use an ArrayList as a value, the other is to use come classes from Apache Commons and the third is to use the Google Guava Multimap class. Each of these allow you to have multiple values per key in a Java map, HashMap, HashTable or whatever key-value pair driven Java collection class you choose.

[vandanavaishnav]

That video is awesome.
Can you plz make a video on multiKeyMap in java also for using multiple keys per value ?

[anthonyman]

PLEASE HELP!!! In the multimap, as you have implemented multiple values into your hashmap, but when it comes to search a single value within multi values contains, result will be false, as in your example in 3:35, if I typed, system outcomes false, may I ask is there anyway to solve if I search a single value inside a multi values but it outcomes the true.

[MexicanZeusGaming]

is there a way to reverse the order of the values in the multimap?

[rajatvatwani]

Can we do this in a method in Java? If yes please tell that

[althearetig]

Hello! Quick question but how do we use/ install Guava into Eclipse?

[subhakanthnikhileshkanchar]

how can we add multiple values to the key in run time

[sd]

Can u pls tell how to implement multiset in java

[sharifulislam]

It is like python's defaultdict(list)...