设计电话薄程序 （1）根据下面的描述设计类层次关系。 1）联系人信息有：姓名、电话、备注； 2）家人信息：还包括地址、固定电话； 3）朋友信息：还包括类别（同学、同事、其他朋友）； 4）工作联系人信息：还包括公司、部门、职务。 （2）注意重写toString（），返回每类对象的全部信息 (3) 要求在父类中定义display()方法，此方法中将toString()结果输出值控台 (4）提供添加、删除、修改、查看指定成员、查看所有联系人信息等方法的java程序

以下是电话薄程序的Java代码实现：

class Contact {
    private String name;
    private String phone;
    private String remark;

    public Contact(String name, String phone, String remark) {
        this.name = name;
        this.phone = phone;
        this.remark = remark;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone;
    }

    public String getRemark() {
        return remark;
    }

    public void setRemark(String remark) {
        this.remark = remark;
    }

    public void display() {
        System.out.println(toString());
    }

    @Override
    public String toString() {
        return "联系人信息：\n姓名：" + name + "\n电话：" + phone + "\n备注：" + remark;
    }
}

class FamilyContact extends Contact {
    private String address;
    private String homePhone;

    public FamilyContact(String name, String phone, String remark, String address, String homePhone) {
        super(name, phone, remark);
        this.address = address;
        this.homePhone = homePhone;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }

    public String getHomePhone() {
        return homePhone;
    }

    public void setHomePhone(String homePhone) {
        this.homePhone = homePhone;
    }

    @Override
    public String toString() {
        return super.toString() + "\n家庭信息：\n地址：" + address + "\n固定电话：" + homePhone;
    }
}

class FriendContact extends Contact {
    private String category;

    public FriendContact(String name, String phone, String remark, String category) {
        super(name, phone, remark);
        this.category = category;
    }

    public String getCategory() {
        return category;
    }

    public void setCategory(String category) {
        this.category = category;
    }

    @Override
    public String toString() {
        return super.toString() + "\n朋友信息：\n类别：" + category;
    }
}

class WorkContact extends Contact {
    private String company;
    private String department;
    private String position;

    public WorkContact(String name, String phone, String remark, String company, String department, String position) {
        super(name, phone, remark);
        this.company = company;
        this.department = department;
        this.position = position;
    }

    public String getCompany() {
        return company;
    }

    public void setCompany(String company) {
        this.company = company;
    }

    public String getDepartment() {
        return department;
    }

    public void setDepartment(String department) {
        this.department = department;
    }

    public String getPosition() {
        return position;
    }

    public void setPosition(String position) {
        this.position = position;
    }

    @Override
    public String toString() {
        return super.toString() + "\n工作信息：\n公司：" + company + "\n部门：" + department + "\n职务：" + position;
    }
}

class PhoneBook {
    private List<Contact> contacts = new ArrayList<>();

    public void addContact(Contact contact) {
        contacts.add(contact);
    }

    public void deleteContact(Contact contact) {
        contacts.remove(contact);
    }

    public void modifyContact(Contact contact, String name, String phone, String remark) {
        contact.setName(name);
        contact.setPhone(phone);
        contact.setRemark(remark);
    }

    public Contact getContactByName(String name) {
        for (Contact contact : contacts) {
            if (contact.getName().equals(name)) {
                return contact;
            }
        }
        return null;
    }

    public List<Contact> getAllContacts() {
        return contacts;
    }
}

使用示例：

public static void main(String[] args) {
    PhoneBook phoneBook = new PhoneBook();

    Contact contact1 = new Contact("张三", "123456789", "好友");
    FamilyContact contact2 = new FamilyContact("李四", "987654321", "亲戚", "北京市朝阳区", "010-12345678");
    FriendContact contact3 = new FriendContact("王五", "111111111", "同学", "同学");
    WorkContact contact4 = new WorkContact("赵六", "222222222", "客户", "阿里巴巴", "技术部", "开发工程师");

    phoneBook.addContact(contact1);
    phoneBook.addContact(contact2);
    phoneBook.addContact(contact3);
    phoneBook.addContact(contact4);

    System.out.println("所有联系人信息：");
    for (Contact contact : phoneBook.getAllContacts()) {
        contact.display();
        System.out.println();
    }

    System.out.println("修改联系人信息：");
    phoneBook.modifyContact(contact1, "张三丰", "123456789", "武术家");
    contact1.display();

    System.out.println("查看指定联系人信息：");
    Contact contact = phoneBook.getContactByName("王五");
    if (contact != null) {
        contact.display();
    } else {
        System.out.println("未找到该联系人！");
    }

    System.out.println("删除联系人信息：");
    phoneBook.deleteContact(contact2);
    for (Contact contactInfo : phoneBook.getAllContacts()) {
        contactInfo.display();
        System.out.println();
    }
}