import java.util.concurrent.ConcurrentHashMap;
public class ConcurrentCollectionExample {
public static void main(String[] args) {
ConcurrentHashMap<String, Integer> scores = new ConcurrentHashMap<>();
Thread t1 = new Thread(() -> {
scores.put("Alice", 95);
});
Thread t2 = new Thread(() -> {
scores.put("Alice", 98);
});
t1.start();
t2.start();
try {
t1.join();
t2.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
