1）联系人信息有：姓名、电话、备注；家人信息：还包括地址、固定电话； 朋友信息：还包括类别（同学、同事、其他朋友）； （2）工作联系人信息：还包括公司、部门、职务。 （3）注重重写toString（），返回每类对象的全部信息 （4）要求在父亲中定义display（）方法，此方法中将toString（）结果输出值控台 （5）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 （6）选做：图形用户界面、网络服务端 （7）使用Comparable或者Comparator方法对于联系人进行排序 （8）定义测试方法测试以上功能。写出可以运行的java程序

好的，下面是一个简单的实现：

import java.util.*;

abstract class Contact implements Comparable<Contact> {
    protected String name;
    protected String phone;
    protected 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 String getPhone() {
        return phone;
    }

    public String getRemark() {
        return remark;
    }

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

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

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

    public abstract String toString();

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

    public int compareTo(Contact other) {
        return this.name.compareTo(other.name);
    }
}

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 String getHomePhone() {
        return homePhone;
    }

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

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

    public String toString() {
        return "FamilyContact: " + name + ", " + phone + ", " + remark + ", " + address + ", " + 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;
    }

    public String toString() {
        return "FriendContact: " + name + ", " + phone + ", " + remark + ", " + 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 String getDepartment() {
        return department;
    }

    public String getPosition() {
        return position;
    }

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

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

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

    public String toString() {
        return "WorkContact: " + name + ", " + phone + ", " + remark + ", " + company + ", " + department + ", " + position;
    }
}

class ContactManager {
    private ArrayList<Contact> contacts;

    public ContactManager() {
        contacts = new ArrayList<Contact>();
    }

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

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

    public void displayAllContacts() {
        for (Contact contact : contacts) {
            contact.display();
        }
    }

    public void displayContactsSorted() {
        Collections.sort(contacts);
        displayAllContacts();
    }
}

public class ContactTest {
    public static void main(String[] args) {
        ContactManager manager = new ContactManager();

        FamilyContact familyContact = new FamilyContact("John", "1234567890", "brother", "123 Main St", "555-5555");
        FriendContact friendContact = new FriendContact("Mary", "2345678901", "classmate", "classmate");
        WorkContact workContact = new WorkContact("Tom", "3456789012", "co-worker", "ABC Company", "IT", "programmer");

        manager.addContact(familyContact);
        manager.addContact(friendContact);
        manager.addContact(workContact);

        manager.displayAllContacts();

        Contact contact = manager.findContact("Mary");
        manager.modifyContact(contact, "Maggie", "3456789123", "friend");
        manager.displayAllContacts();

        manager.removeContact(workContact);
        manager.displayContactsSorted();
    }
}

这个程序实现了联系人管理的基本功能，包括添加、删除、修改、查找、查看所有联系人信息等。同时，还实现了排序功能，可以按照联系人姓名进行排序。