Joiner is part library of google guava, this class help us to join a List and Map. An object which joins pieces of text (specified as an array, Iterable, varargs or even a Map) with a separator. It either appends the results to an Appendable or returns them as a String.

Let’s see the Example :

And here are the results of our code snippet above:

Visit My Repository for full code
showimage

Reference

Gist Konrad

Google Guava Joiner Documentation