what kind of collections you used in java 3f

1Selenium List of elements. List of the collection
2We have Set Collection Type in our framework. 
3Getwindowhandles to handle multiple tabs. 
4return type is Getwindowhandles methods is going to return Set. 
5For avoid Duplication in Selenium multiple check box, dropdown box. 
6We use Set. We get only unique webelements.
7Map has not Interface. For key and value. 
8List and Set has not a key and value data. 
9API testing we are getting data from json file. 
10Jason file datas are key and value format.
11Data base testing we are using maps. 
12If you want to get pairs of data from tables.
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