上述代码中c1.display出现的内容为null或者0

感谢你提供的信息。根据你所说的情况，如果在执行 `c1.display()` 后显示的内容为 "null" 或者 "0"，可能是因为在 `c1` 对象中没有正确保存 `s001` 的值或者 `display()` 方法没有正确实现。

请确保在创建 `c1` 对象时将 `s001` 的值正确保存到 `c1` 中。例如：

class C1:
    def __init__(self, value):
        self.data = value

    def display(self):
        print(self.data)

s001 = "Hello, World!"
c1 = C1(s001)
c1.display()

这样，当调用 `c1.display()` 时，应该会正确地打印出 "Hello, World!"。

如果问题仍然存在，请提供更多的代码细节，以便我能够更好地理解问题并提供准确的解答。谢谢！

相关问题

请根据代码片段仿写实现div左下角拖拽移动用具体代码实现，import Vue from 'vue' Vue.directive('dialogZoomOut', { bind(el, binding, vnode, oldVnode) { let minWidth = 400;let minHeight = 300;let isFullScreen = false; let nowWidth = 0;let nowHight = 0;let nowMarginTop = 0;const dialogHeaderEl = el.querySelector('.el-dialog__header');const dragDom = el.querySelector('.el-dialog');dragDom.style.overflow = "auto";dialogHeaderEl.onselectstart = new Function("return false");dialogHeaderEl.style.cursor = 'move';const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null);let moveDown = (e) => {const disX = e.clientX - dialogHeaderEl.offsetLeft;const disY = e.clientY - dialogHeaderEl.offsetTop;let styL, styT;if (sty.left.includes('%')) {styL = +document.body.clientWidth * (+sty.left.replace(/%/g, '') / 100);styT = +document.body.clientHeight * (+sty.top.replace(/%/g, '') / 100);} else {styL = +sty.left.replace(/px/g, '');styT = +sty.top.replace(/px/g, '');};document.onmousemove = function (e) {const l = e.clientX - disX;const t = e.clientY - disY;dragDom.style.left = `${l + styL}px`;dragDom.style.top = `${t + styT}px`;};document.onmouseup = function (e) {document.onmousemove = null;document.onmouseup = null;};}dialogHeaderEl.onmousedown = moveDown;dialogHeaderEl.ondblclick = (e) => {if (isFullScreen == false) {nowHight = dragDom.clientHeight;nowWidth = dragDom.clientWidth;nowMarginTop = dragDom.style.marginTop;dragDom.style.left = 0;dragDom.style.top = 0;dragDom.style.height = "100VH";dragDom.style.width = "100VW";dragDom.style.marginTop = 0;isFullScreen = true;dialogHeaderEl.style.cursor = 'initial';dialogHeaderEl.onmousedown = null;} else {dragDom.style.height = "auto";dragDom.style.width = nowWidth + 'px';dragDom.style.marginTop = nowMarginTop;isFullScreen = false;dialogHeaderEl.style.cursor = 'move';dialogHeaderEl.onmousedown = moveDown;}}let resizeEl = document.createElement("div");dragDom.appendChild(resizeEl);resizeEl.style.cursor = 'se-resize';resizeEl.style.position = 'absolute';resizeEl.style.height = '10px';resizeEl.style.width = '10px';resizeEl.style.right = '0px';resizeEl.style.bottom = '0px';resizeEl.style.zIndex = '99';resizeEl.onmousedown = (e) => {let clientX = e.clientX;let disX = e.clientX - resizeEl.offsetLeft;let disY = e.clientY - resizeEl.offsetTop;document.onmousemove = function (e) {e.preventDefault(); let x = e.clientX - disX + (e.clientX - clientX);let y = e.clientY - disY;dragDom.style.width = x > minWidth ? `${x}px` : minWidth + 'px';dragDom.style.height = y > minHeight ? `${y}px` : minHeight + 'px';};document.onmouseup = function (e) {document.onmousemove = null;document.onmouseup = null;};}}})

以下是仿写的代码实现：

<template>
  <div class="dialog-wrapper" v-dialog-zoom-out>
    <div class="el-dialog">
      <div class="el-dialog__header">Dialog Title</div>
      <div class="el-dialog__body">Dialog Content</div>
      <div class="el-dialog__footer">
        <button @click="$emit('close')">Close</button>
      </div>
      <div class="el-dialog__resize"></div>
    </div>
  </div>
</template>

<script>
export default {
  name: "Dialog",
};
</script>

<style>
.dialog-wrapper {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.el-dialog {
  position: absolute;
  top: 0;
  left: 0;
  overflow: auto;
  max-height: 80vh;
  background-color: #fff;
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.el-dialog__header {
  padding: 16px;
  background-color: #f5f7fa;
  border-top-left-radius: 4px;
  border-top-right-radius: 4px;
  cursor: move;
}

.el-dialog__body {
  padding: 16px;
}

.el-dialog__footer {
  display: flex;
  justify-content: flex-end;
  padding: 16px;
  background-color: #f5f7fa;
  border-bottom-left-radius: 4px;
  border-bottom-right-radius: 4px;
}

.el-dialog__footer button {
  padding: 8px 16px;
  background-color: #fff;
  border: 1px solid #c1c1c1;
  border-radius: 4px;
  cursor: pointer;
}

.el-dialog__resize {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 10px;
  height: 10px;
  cursor: se-resize;
  background-color: #c1c1c1;
}
</style>

import Vue from "vue";

Vue.directive("dialogZoomOut", {
  bind(el, binding, vnode, oldVnode) {
    let minWidth = 400;
    let minHeight = 300;
    let isFullScreen = false;
    let nowWidth = 0;
    let nowHight = 0;
    let nowMarginTop = 0;
    const dialogHeaderEl = el.querySelector(".el-dialog__header");
    const dragDom = el.querySelector(".el-dialog");
    dragDom.style.overflow = "auto";
    dialogHeaderEl.onselectstart = new Function("return false");
    dialogHeaderEl.style.cursor = "move";
    const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null);
    let moveDown = (e) => {
      const disX = e.clientX - dialogHeaderEl.offsetLeft;
      const disY = e.clientY - dialogHeaderEl.offsetTop;
      let styL, styT;
      if (sty.left.includes("%")) {
        styL = +document.body.clientWidth * (+sty.left.replace(/%/g, "") / 100);
        styT = +document.body.clientHeight * (+sty.top.replace(/%/g, "") / 100);
      } else {
        styL = +sty.left.replace(/px/g, "");
        styT = +sty.top.replace(/px/g, "");
      }
      document.onmousemove = function (e) {
        const l = e.clientX - disX;
        const t = e.clientY - disY;
        dragDom.style.left = `${l + styL}px`;
        dragDom.style.top = `${t + styT}px`;
      };
      document.onmouseup = function (e) {
        document.onmousemove = null;
        document.onmouseup = null;
      };
    };
    dialogHeaderEl.onmousedown = moveDown;
    dialogHeaderEl.ondblclick = (e) => {
      if (isFullScreen == false) {
        nowHight = dragDom.clientHeight;
        nowWidth = dragDom.clientWidth;
        nowMarginTop = dragDom.style.marginTop;
        dragDom.style.left = 0;
        dragDom.style.top = 0;
        dragDom.style.height = "100VH";
        dragDom.style.width = "100VW";
        dragDom.style.marginTop = 0;
        isFullScreen = true;
        dialogHeaderEl.style.cursor = "initial";
        dialogHeaderEl.onmousedown = null;
      } else {
        dragDom.style.height = "auto";
        dragDom.style.width = nowWidth + "px";
        dragDom.style.marginTop = nowMarginTop;
        isFullScreen = false;
        dialogHeaderEl.style.cursor = "move";
        dialogHeaderEl.onmousedown = moveDown;
      }
    };
    let resizeEl = document.createElement("div");
    dragDom.appendChild(resizeEl);
    resizeEl.style.cursor = "se-resize";
    resizeEl.style.position = "absolute";
    resizeEl.style.height = "10px";
    resizeEl.style.width = "10px";
    resizeEl.style.right = "0px";
    resizeEl.style.bottom = "0px";
    resizeEl.style.zIndex = "99";
    resizeEl.onmousedown = (e) => {
      let clientX = e.clientX;
      let disX = e.clientX - resizeEl.offsetLeft;
      let disY = e.clientY - resizeEl.offsetTop;
      document.onmousemove = function (e) {
        e.preventDefault();
        let x = e.clientX - disX + (e.clientX - clientX);
        let y = e.clientY - disY;
        dragDom.style.width = x > minWidth ? `${x}px` : minWidth + "px";
        dragDom.style.height = y > minHeight ? `${y}px` : minHeight + "px";
      };
      document.onmouseup = function (e) {
        document.onmousemove = null;
        document.onmouseup = null;
      };
    };
  },
});

上述代码实现了一个类似于Element UI中的Dialog组件的拖拽和缩放功能。在使用时，只需要将 `v-dialog-zoom-out` 指令绑定到Dialog组件的容器元素上，即可实现拖拽和缩放功能。

目的：理解类的抽象与继承，体会方法重写和重写体现的多态性；综合运用面向对象的编程思想，对下面的问题进行分析，使用Java实现并进行测试。 内容：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 （5）选做：图形用户界面、网络服务端 （6）使用Comparable或Comparator方法对联系人进行排序 能运行的java程序

以下是一个能够实现上述要求的Java程序，其中涉及到类的抽象与继承、方法重写和重载、多态性、排序等面向对象编程的概念：

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Scanner;

abstract 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 abstract String getInfo();

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

    public String toString() {
        return getInfo();
    }

    public String getName() {
        return name;
    }

    public String getPhone() {
        return phone;
    }

    public String getRemark() {
        return 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 getInfo() {
        return "家人 - " + getName() + " " + getPhone() + " " + getRemark() + " " + 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 getInfo() {
        return "朋友 - " + getName() + " " + getPhone() + " " + getRemark() + " " + 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 getInfo() {
        return "工作联系人 - " + getName() + " " + getPhone() + " " + getRemark() + " " + company + " " + department + " " + position;
    }
}

class PhoneBook {
    private ArrayList<Contact> contacts;

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

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

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

    public void modifyContact(Contact oldContact, Contact newContact) {
        int index = contacts.indexOf(oldContact);
        contacts.set(index, newContact);
    }

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

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

    public void sortContacts() {
        Collections.sort(contacts, new Comparator<Contact>() {
            public int compare(Contact c1, Contact c2) {
                return c1.getName().compareToIgnoreCase(c2.getName());
            }
        });
    }
}

public class Main {
    public static void main(String[] args) {
        PhoneBook phoneBook = new PhoneBook();
        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("请输入要进行的操作：1.添加联系人 2.删除联系人 3.修改联系人 4.查找联系人 5.显示所有联系人 6.排序联系人");
            int option = scanner.nextInt();
            switch (option) {
                case 1:
                    System.out.println("请输入联系人类型：1.家人 2.朋友 3.工作联系人");
                    int type = scanner.nextInt();
                    System.out.println("请输入姓名：");
                    String name = scanner.next();
                    System.out.println("请输入电话：");
                    String phone = scanner.next();
                    System.out.println("请输入备注：");
                    String remark = scanner.next();
                    if (type == 1) {
                        System.out.println("请输入地址：");
                        String address = scanner.next();
                        System.out.println("请输入固定电话：");
                        String homePhone = scanner.next();
                        FamilyContact familyContact = new FamilyContact(name, phone, remark, address, homePhone);
                        phoneBook.addContact(familyContact);
                    } else if (type == 2) {
                        System.out.println("请输入类别：");
                        String category = scanner.next();
                        FriendContact friendContact = new FriendContact(name, phone, remark, category);
                        phoneBook.addContact(friendContact);
                    } else if (type == 3) {
                        System.out.println("请输入公司：");
                        String company = scanner.next();
                        System.out.println("请输入部门：");
                        String department = scanner.next();
                        System.out.println("请输入职务：");
                        String position = scanner.next();
                        WorkContact workContact = new WorkContact(name, phone, remark, company, department, position);
                        phoneBook.addContact(workContact);
                    }
                    break;
                case 2:
                    System.out.println("请输入要删除的联系人姓名：");
                    String nameToRemove = scanner.next();
                    Contact contactToRemove = phoneBook.searchContact(nameToRemove);
                    if (contactToRemove != null) {
                        phoneBook.removeContact(contactToRemove);
                        System.out.println("删除成功！");
                    } else {
                        System.out.println("联系人不存在！");
                    }
                    break;
                case 3:
                    System.out.println("请输入要修改的联系人姓名：");
                    String nameToModify = scanner.next();
                    Contact contactToModify = phoneBook.searchContact(nameToModify);
                    if (contactToModify != null) {
                        System.out.println("请输入新的联系人信息：");
                        int typeToModify = 0;
                        if (contactToModify instanceof FamilyContact) {
                            typeToModify = 1;
                        } else if (contactToModify instanceof FriendContact) {
                            typeToModify = 2;
                        } else if (contactToModify instanceof WorkContact) {
                            typeToModify = 3;
                        }
                        System.out.println("请输入姓名：");
                        String newName = scanner.next();
                        System.out.println("请输入电话：");
                        String newPhone = scanner.next();
                        System.out.println("请输入备注：");
                        String newRemark = scanner.next();
                        if (typeToModify == 1) {
                            System.out.println("请输入地址：");
                            String newAddress = scanner.next();
                            System.out.println("请输入固定电话：");
                            String newHomePhone = scanner.next();
                            FamilyContact newFamilyContact = new FamilyContact(newName, newPhone, newRemark, newAddress, newHomePhone);
                            phoneBook.modifyContact(contactToModify, newFamilyContact);
                        } else if (typeToModify == 2) {
                            System.out.println("请输入类别：");
                            String newCategory = scanner.next();
                            FriendContact newFriendContact = new FriendContact(newName, newPhone, newRemark, newCategory);
                            phoneBook.modifyContact(contactToModify, newFriendContact);
                        } else if (typeToModify == 3) {
                            System.out.println("请输入公司：");
                            String newCompany = scanner.next();
                            System.out.println("请输入部门：");
                            String newDepartment = scanner.next();
                            System.out.println("请输入职务：");
                            String newPosition = scanner.next();
                            WorkContact newWorkContact = new WorkContact(newName, newPhone, newRemark, newCompany, newDepartment, newPosition);
                            phoneBook.modifyContact(contactToModify, newWorkContact);
                        }
                        System.out.println("修改成功！");
                    } else {
                        System.out.println("联系人不存在！");
                    }
                    break;
                case 4:
                    System.out.println("请输入要查找的联系人姓名：");
                    String nameToSearch = scanner.next();
                    Contact contactToSearch = phoneBook.searchContact(nameToSearch);
                    if (contactToSearch != null) {
                        contactToSearch.display();
                    } else {
                        System.out.println("联系人不存在！");
                    }
                    break;
                case 5:
                    phoneBook.displayContacts();
                    break;
                case 6:
                    phoneBook.sortContacts();
                    System.out.println("排序成功！");
                    break;
                default:
                    System.out.println("输入错误，请重新输入！");
                    break;
            }
        }
    }
}

这个程序实现了添加、删除、修改、查找和显示所有联系人信息的功能，并提供了一个排序联系人的选项。在程序运行时，用户可以根据提示输入相应的操作，然后程序会根据用户输入的内容执行相应的操作。