用java编写：【问题描述】编程实现如图所示的类间关联关系(双向关联) Contact -contactId:int Phone -name:String -phoneNum:String -isFreqContact:boolean 1 1 ..* -phoneArray:ArrayList<Phone> -type:String -aContact:Contact getPhones():arrayList addPhoneToContact(aPhone:Phone):void 【输入形式】 输入分4行， 第1行：联系人ID联系人姓名 第2行：第一个联系电话号码联系电话类型 第3行：第二个联系电话号码联系电话类型 第4行：第三个联系电话号码联系电话类型

以下是Java代码实现：

import java.util.ArrayList;

class Contact {
    private int contactId;
    private String name;
    private ArrayList<Phone> phoneArray = new ArrayList<Phone>();

    public Contact(int contactId, String name) {
        this.contactId = contactId;
        this.name = name;
    }

    public ArrayList<Phone> getPhones() {
        return phoneArray;
    }

    public void addPhoneToContact(Phone aPhone) {
        phoneArray.add(aPhone);
        aPhone.setContact(this);
    }

    // getter and setter methods
}

class Phone {
    private String name;
    private String phoneNum;
    private boolean isFreqContact;
    private String type;
    private Contact aContact;

    public Phone(String name, String phoneNum, String type) {
        this.name = name;
        this.phoneNum = phoneNum;
        this.type = type;
    }

    public void setContact(Contact aContact) {
        this.aContact = aContact;
    }

    // getter and setter methods
}

public class Main {
    public static void main(String[] args) {
        // 读入联系人信息
        String[] contactInfo = new String[2];
        Scanner sc = new Scanner(System.in);
        for (int i = 0; i < 2; i++) {
            contactInfo[i] = sc.nextLine();
        }
        Contact aContact = new Contact(Integer.parseInt(contactInfo[0]), contactInfo[1]);

        // 读入电话信息
        for (int i = 0; i < 3; i++) {
            String[] phoneInfo = sc.nextLine().split(" ");
            Phone aPhone = new Phone(phoneInfo[0], phoneInfo[1], phoneInfo[2]);
            aContact.addPhoneToContact(aPhone);
        }

        // 输出联系人的电话信息
        ArrayList<Phone> phones = aContact.getPhones();
        for (Phone phone : phones) {
            System.out.println(phone.getName() + " " + phone.getPhoneNum() + " " + phone.getType());
        }
    }
}

输入样例：

123 John
12345678901 mobile
98765432109 home
13579246810 work

输出样例：

12345678901 mobile
98765432109 home
13579246810 work