Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import java.util.List;

public class Main {
    public static double calculateCosineSimilarity(List<Double> list1, List<Double> list2) {
        if (list1.size() != list2.size()) {
            System.err.println("Two lists must have the same dimensionality.");
            return 0;
        }
        double dividend = 0, divisor1 = 0, divisor2 = 0;

        for (int i = 0; i < list1.size(); i++) {
            dividend += list1.get(i) * list2.get(i);
            divisor1 += Math.pow(list1.get(i), 2);
            divisor2 += Math.pow(list2.get(i), 2);
        }
        return dividend / (Math.sqrt(divisor1) * Math.sqrt(divisor2));
    }
}