我正在编写一个侦察系统的代码，我有多个类，层次结构如下：iScoutMember -> Scout（实现iScoutMember） -> BeaverScout（扩展Scout）。我还有一个ScoutList类，用于处理将侦察员添加到侦察员ArrayList中，以及ScoutSystem类，它创建一个菜单并使用ScoutList类中的方法。
我遇到的错误来自ScoutSystem类中的addScout方法，当我尝试为ArrayList SpecialInterests添加信息时出错。
这是错误信息：
**错误：（108, 103）java：不兼容的类型：无法将SpecialInterest转换为java.util.ArrayList< SpecialInterest >**
**错误：（112, 103）java：不兼容的类型：无法将SpecialInterest转换为java.util.ArrayList< SpecialInterest >**
这是Scout类的代码：
import java.util.ArrayList;
public abstract class Scout implements iScoutMember {
private String name;
private String county;
private String dateOfBirth;
private String address;
private String phoneNumber;
private ArrayList< SpecialInterest > specialInterests;
public Scout(String name, String county, String dateOfBirth, String address, String phoneNumber, ArrayList< SpecialInterest > specialInterests) {
    this.name = name;
    this.county = county;
    this.dateOfBirth = dateOfBirth;
    this.address = address;
    this.phoneNumber = phoneNumber;
    this.specialInterests = specialInterests;
}
...
这是SpecialInterest类的代码：
public class SpecialInterest {
private String interestCategory;
private String details;
private String dateBadgeReceived;
public SpecialInterest(String interestCategory, String details, String dateBadgeReceived) {
    this.interestCategory = interestCategory;
    this.details = details;
    this.dateBadgeReceived = dateBadgeReceived;
}
...
最后，这是Scout系统类中的addScout方法的代码：
private void addScout(){
    System.out.println("您想要添加哪种侦察员？");
    System.out.println("1. Beaver侦察员");
    System.out.println("2. Cub侦察员");
    System.out.println("3. Scouter");
    int option = input.nextInt();
    switch(option){
        case 1:
            System.out.println("姓名 => ");
            System.out.println("县城 => ");
            System.out.println("出生日期 => ");
            System.out.println("地址 => ");
            System.out.println("联系电话 => ");
            String name = input.nextLine();
            String county = input.nextLine();
            String dateOfBirth = input.nextLine();
            String address = input.nextLine();
            String phoneNumber = input.nextLine();
            System.out.println("输入特别兴趣详情");
            System.out.println("特别兴趣类别");
            System.out.println("详情");
            System.out.println("获得徽章的日期");
            String interestCategory = input.nextLine();
            String details = input.nextLine();
            String dateBadgeReceived = input.nextLine();
            SpecialInterest sp1 = new SpecialInterest(interestCategory,details,dateBadgeReceived);
            System.out.println("您是否想输入另一个特别兴趣：Y/y表示是，N/n表示否 => ");
            String ans = input.nextLine();
            ans.toUpperCase();
            if (ans.equals("Y")){
                System.out.println("父母电话号码？");
                String parentPhone = input.nextLine();
                BeaverScout s1 = new BeaverScout(name, county, dateOfBirth, address, phoneNumber, sp1, parentPhone);
                scoutList.addScout(s1);
            } else if(ans.equals("N")){
                String parentPhone = "";
                BeaverScout s1 = new BeaverScout(name, county, dateOfBirth, address, phoneNumber, sp1, parentPhone);
                scoutList.addScout(s1);
            }
    }
}
}
这是给我错误的代码行：
BeaverScout s1 = new BeaverScout(name, county, dateOfBirth, address, phoneNumber, sp1, parentPhone);

SpecialInterest sp1 = new SpecialInterest(interestCategory,details,dateBadgeReceived);
//其他操作
BeaverScout s1 = new BeaverScout(name, county, dateOfBirth, address, phoneNumber, sp1, parentPhone);

ArrayList<SpecialInterest> sps = new ArrayList<>();
SpecialInterest sp1 = new SpecialInterest(interestCategory,details,dateBadgeReceived);
sps.add(sp1);
//其他操作
BeaverScout s1 = new BeaverScout(name, county, dateOfBirth, address, phoneNumber, sps, parentPhone);