编写一个通信录管理系统(具有增加、修改、删除、查询等功能)。
import java.util.ArrayList;
import java.util.Scanner;
public 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 updateContact(Contact oldContact, Contact newContact) {
int index = contacts.indexOf(oldContact);
contacts.set(index, newContact);
}
public ArrayList<Contact> searchContacts(String keyword) {
ArrayList<Contact> results = new ArrayList<Contact>();
for (Contact contact : contacts) {
if (contact.getName().contains(keyword) || contact.getPhoneNumber().contains(keyword)) {
results.add(contact);
}
}
return results;
}
public static void main(String[] args) {
ContactManager manager = new ContactManager();
Scanner scanner = new Scanner(System.in);
while (true) {
System.out.println("请选择操作：");
System.out.println("1. 添加联系人");
System.out.println("2. 删除联系人");
System.out.println("3. 修改联系人");
System.out.println("4. 查询联系人");
System.out.println("5. 退出");
int choice = scanner.nextInt();
scanner.nextLine();
switch (choice) {
case 1:
System.out.println("请输入联系人姓名：");
String name = scanner.nextLine();
System.out.println("请输入联系人电话号码：");
String phoneNumber = scanner.nextLine();
Contact contact = new Contact(name, phoneNumber);
manager.addContact(contact);
System.out.println("联系人添加成功！");
break;
case 2:
System.out.println("请输入要删除的联系人姓名：");
String nameToDelete = scanner.nextLine();
ArrayList<Contact> searchResults = manager.searchContacts(nameToDelete);
if (searchResults.size() == 0) {
System.out.println("未找到该联系人！");
} else if (searchResults.size() == 1) {
manager.removeContact(searchResults.get(0));
System.out.println("联系人删除成功！");
} else {
System.out.println("找到多个联系人，请输入要删除的联系人的电话号码：");
String phoneNumberToDelete = scanner.nextLine();
boolean found = false;
for (Contact c : searchResults) {
if (c.getPhoneNumber().equals(phoneNumberToDelete)) {
manager.removeContact(c);
System.out.println("联系人删除成功！");
found = true;
break;
}
}
if (!found) {
System.out.println("未找到该联系人！");
}
}
break;
case 3:
System.out.println("请输入要修改的联系人姓名：");
String nameToUpdate = scanner.nextLine();
ArrayList<Contact> searchResults2 = manager.searchContacts(nameToUpdate);
if (searchResults2.size() == 0) {
System.out.println("未找到该联系人！");
} else if (searchResults2.size() == 1) {
System.out.println("请输入新的联系人姓名：");
String newName = scanner.nextLine();
System.out.println("请输入新的联系人电话号码：");
String newPhoneNumber = scanner.nextLine();
Contact newContact = new Contact(newName, newPhoneNumber);
manager.updateContact(searchResults2.get(0), newContact);
System.out.println("联系人修改成功！");
} else {
System.out.println("找到多个联系人，请输入要修改的联系人的电话号码：");
String phoneNumberToUpdate = scanner.nextLine();
boolean found = false;
for (Contact c : searchResults2) {
if (c.getPhoneNumber().equals(phoneNumberToUpdate)) {
System.out.println("请输入新的联系人姓名：");
String newName = scanner.nextLine();
System.out.println("请输入新的联系人电话号码：");
String newPhoneNumber = scanner.nextLine();
Contact newContact = new Contact(newName, newPhoneNumber);
manager.updateContact(c, newContact);
System.out.println("联系人修改成功！");
found = true;
break;
}
}
if (!found) {
System.out.println("未找到该联系人！");
}
}
break;
case 4:
System.out.println("请输入要查询的关键字：");
String keyword = scanner.nextLine();
ArrayList<Contact> searchResults3 = manager.searchContacts(keyword);
if (searchResults3.size() == 0) {
System.out.println("未找到符合条件的联系人！");
} else {
System.out.println("查询结果如下：");
for (Contact c : searchResults3) {
System.out.println(c);
}
}
break;
case 5:
System.out.println("程序已退出！");
System.exit(0);
default:
System.out.println("无效的操作，请重新输入！");
}
}
}
}
class Contact {
private String name;
private String phoneNumber;
public Contact(String name, String phoneNumber) {
this.name = name;
this.phoneNumber = phoneNumber;
}
public String getName() {
return name;
}
public String getPhoneNumber() {
return phoneNumber;
}
public void setName(String name) {
this.name = name;
}
public void setPhoneNumber(String phoneNumber) {
this.phoneNumber = phoneNumber;
}
@Override
public String toString() {
return "姓名：" + name + "，电话号码：" + phoneNumber;
}
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Contact other = (Contact) obj;
if ((this.name == null) ? (other.name != null) : !this.name.equals(other.name)) {
return false;
}
if ((this.phoneNumber == null) ? (other.phoneNumber != null) : !this.phoneNumber.equals(other.phoneNumber)) {
return false;
}
return true;
}
@Override
public int hashCode() {
int hash = 7;
hash = 89 * hash + (this.name != null ? this.name.hashCode() : 0);
hash = 89 * hash + (this.phoneNumber != null ? this.phoneNumber.hashCode() : 0);
return hash;
}
}
import joblib
保存：joblib.dump(rf, 'test.pkl')
加载：estimator = joblib.load('test.pkl')
注：文件格式pkl
我已经将代码中的格式化部分进行了修改，使其可以正常运行。另外，根据您的问题，需要更多关于您通信录管理系统的详细信息和所需功能的介绍才能给出具体的帮助和解决方案。请提供更多细节信息和context，以便ChatGPT更好地为您服务。谢谢！