java - java中用元素返回名称的方法？

Question

Java 初学者，我寻找通过用户提供的 id 使用函数“readPeople ()”返回 ArrayList“this.list”中关联的名称的方法。 这是我的代码:

public class PersonneC implements PersonneDB {
    this.list = new ArrayList();

    People marie = new People(1, "Bower", "Marie");
    list.add(marie.toString());

      public PeopleWithId readPeople(int idPeople) {
        PeopleWithId peoplename = null;
        for(int i = 0; i < list.size(); i++) {
            if(liste.get(i).equals(idPeople)) {
                result = list.get(i);
            }
        }
        return result.getPeopleName(); //ERROR INCOMPATIBLE TYPES
        }

Wanted result returned: Bower

Answer 1

您的方法返回一个字符串，readPeople的返回类型为PeopleWithId