new Person() - cannot resolve symbol Person

package com.javarush.task.task17.task1715;

import java.util.ArrayList;
import java.util.List;

/*
Аптека
*/

public class Solution {
    public static DrugsController drugsController = new DrugsController();
    public static boolean isStopped = false;

    public static void main(String[] args) throws InterruptedException {
        Thread apteka = new Thread(new Apteka());
        Thread man = new Thread(new Person(), "Мужчина");
        Thread woman = new Thread(new Person(), "Женщина");

        apteka.start();
        man.start();
        woman.start();

        Thread.sleep(1000);
        isStopped = true;
    }

    public static class Apteka implements Runnable {
        @Override

        public void run() {
            while (!isStopped) {
                try {
                    drugsController.buy(getRandomDrug(), getRandomCount());
                    waitAMoment();
                    waitAMoment();
                    waitAMoment();
                } catch (Throwable a) {
                }
            }

        }

        public static class Person implements Runnable {
            @Override
            public void run() {
                while (!isStopped) {
                    try {
                        drugsController.sell(getRandomDrug(), getRandomCount());
                        waitAMoment();
                    } catch (Throwable b) {

                    }
                }
            }
        }

        public static int getRandomCount() {
            return (int) (Math.random() * 3) + 1;
        }

        public static Drug getRandomDrug() {
            int index = (int) ((Math.random() * 1000) % (drugsController.allDrugs.size()));
            List<Drug> drugs = new ArrayList<>(drugsController.allDrugs.keySet());
            return drugs.get(index);
        }

        private static void waitAMoment() {
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
            }
        }
    }
}

package com.javarush.task.task17.task1715;

import java.util.HashMap;
import java.util.Map;

public class DrugsController {
    public static Map<Drug, Integer> allDrugs = new HashMap<Drug, Integer>();   // <Лекарство, Количество>

    static {
        Drug panadol = new Drug();
        panadol.setName("Панадол");
        allDrugs.put(panadol, 5);

        Drug analgin = new Drug();
        analgin.setName("Анальгин");
        allDrugs.put(analgin, 18);

        Drug placebo = new Drug();
        placebo.setName("Плацебо");
        allDrugs.put(placebo, 1);
    }

    public void sell(Drug drug, int count) {
        synchronized (this) {
            String name = Thread.currentThread().getName();
            if (!allDrugs.containsKey(drug)) {
                System.out.println("Нет в наличии");
            }
            Integer currentCount = allDrugs.get(drug);
            if (currentCount < count) {
                System.out.println(String.format("%s хочет %s %d шт. В наличии - %d", name, drug.getName(), count, currentCount));
            } else {
                allDrugs.put(drug, (currentCount - count));
                System.out.println(String.format("%s купил(а) %s %d шт. Осталось - %d", name, drug.getName(), count, (currentCount - count)));
            }
        }
    }

    public void buy(Drug drug, int count) {
        synchronized (this) {
            System.out.println("Закупка " + drug.getName() + " " + count);
            if (!allDrugs.containsKey(drug)) {
                allDrugs.put(drug, 0);
            }
            Integer currentCount = allDrugs.get(drug);
            allDrugs.put(drug, (currentCount + count));
        }
    }
}

package com.javarush.task.task17.task1715;

public class Drug {
    private String name;
    private String description;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }
}