Using a map and a set as auxiliary storages, write a static method search that accepts a string list as a parameter, and returns the set with most frequent strings in the list. For example, given a...

Java


Extracted text: Using a map and a set as auxiliary storages, write a static method search that accepts a string list as a parameter, and returns the set with most frequent strings in the list. For example, given a string list ["a", "b", "cd", "cd", "ef", "ef"), the method will return a set containing ["cd", "ef"] since "cd" and "ef" both appeared most frequently (2 times where all other strings appeared once).