https://www.youtube.com/watch?v=QPZ0pIK_wsc

FizzBuzz.java

import java.util.*;

public class FizzBuzz
{
    Map<Integer, String> map;
       
    public FizzBuzz()
    {
       Init();
    }

    private void Init()
    {
        map = new HashMap<Integer, String>();
        map.put(3, "Fizz");
        map.put(5, "Buzz");
        map.put(7, "Wozz");
        // add more substitutions ...
    }
    
    public void Run()
    {
       for(int i = 1; i <= 100; i++){
            System.out.print(Num2String(i));
            System.out.print("\n");
        }
    }
    
    private String Num2String(int i)
    {
        String result = "";
        for (Map.Entry<Integer, String> pair : map.entrySet()){
            if (i % pair.getKey() == 0) result += pair.getValue(); 
        }
        if (result.length() == 0) result = Integer.toString(i);
        return result;
    }
}