Android Java implementation cosine matching algorithm example code

Java implementation of cosine matching algorithm

Recently, I was working on a project of communication and making friends. There was a demand in the project to find and recommend friends with similar interests for users through their interests. In fact, the idea is very simple. Match the interests of users with those of other users, and recommend them to both sides when their hobbies are highly similar. So how to compare is a problem. In fact, we can compare users' interests and hobbies through cosine matching algorithm, get a list of friends with similar interests and hobbies according to the calculated value, and sort them.

Because my project is on the Android side, the algorithm is implemented through Java. No more nonsense. Here is the implementation of the algorithm:

effect:

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