问通过地图进行搜索的最佳方法

EN

public Map<String, Person> personMap = new HashMap<>();

public ArrayList<Person> searchByName(String query) {
    ArrayList<Person> listOfPeople = new ArrayList<>();
    for (Map.Entry<String, Person> entry : this.personMap.entrySet()) {
        Person person = entry.getValue();
        String name = entry.getValue().getName();
        if (name.toLowerCase().contains(query.toLowerCase())) {
            listOfPeople.add(person);
        }
    }
    if (listOfPeople.isEmpty()) {
        throw new IllegalStateException("This data doesn't appear on the Map");
    }
    return listOfPeople;
}