Getting the most frequent value from an array

Question

I have an array like the following

String[] football_club = {"Barcelona", "Real Madrid", "Chelsea", "Real Madrid", "Barcelona", "Barcelona"};

//result
Sting result_club = "a value most in the array"

From the array above, the "Barcelona" which has a value which often exist in the array.
How coding to find the value that appears most frequently in an array?

Answer 1

You can make a HashMap<String,Integer>. If the String already appears in the map, increment it's key by one, otherwise, add it to the map.

For example:

put("Barcelona", 1);

Then, assume it's "Barcelona" again, you can do:

put("Barcelona", get("Barcelona") + 1);

Since the key of "Barcelona" is 1, now when you put it, the key will be 2.