почему c while работает, а с if нет?
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(), "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 {
public void run() {
while (!isStopped) {
drugsController.buy(getRandomDrug(), getRandomCount());
for (int i = 0; i < 3; i++) {
Solution.waitAMoment();
}
}
}
}
public static class Person implements Runnable {
public void run() {
if(isStopped = false) {
drugsController.sell(Solution.getRandomDrug(), Solution.getRandomCount());
Solution.waitAMoment();
}
}
}
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) {
}
}
}