Revise paste Untitled

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Semaphore;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class Factory {
    List<String> vaccines = new ArrayList<>();
    int max_capacity = 5;
    Semaphore fabrika = new Semaphore(1);
    Semaphore proizveduvac = new Semaphore(10);
    Semaphore kupuvac = new Semaphore(10);
    public Factory(int capacity) {
        max_capacity = capacity;
    }
    public void produce_vaccine(String vaccine) throws InterruptedException{
        proizveduvac.acquire(); // namali go brojot na permits za proizveduvacot
        fabrika.acquire();
        while(vaccines.size() == max_capacity) {
            fabrika.release();
            Thread.sleep(50);
            fabrika.acquire();
        }
        vaccines.add(vaccine);
        System.out.println("proizvedna: " + vaccine);
        fabrika.release();
        kupuvac.release();
    }
    public void buy_vaccine() throws InterruptedException {
        kupuvac.acquire();
        fabrika.acquire();
        while(vaccines.size() == 0) {
            fabrika.release();
            Thread.sleep(50);
            fabrika.acquire();
        }
        System.out.println("kupena: " + vaccines.remove(0));
        proizveduvac.release();
    }
}