Java实现通讯录管理系统教程

下面是源代码：

import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;
import java.util.concurrent.SynchronousQueue;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.WindowConstants;
import javax.swing.text.html.HTMLDocument.Iterator;


class Infro{
 public String id;
 public String name;
 public String sex;
 public String address;
 public String e_mail;
 public String phoneNumber;
 static int index = 0;
 static ArrayList list = new ArrayList();
 static int len = list.size();
 //构造函数
 public Infro(String id,String name,String sex,String address,String e_mail,String phoneNumber){
 this.id = id;
 this.name = name;
 this.sex = sex;
 this.address = address;
 this.e_mail = e_mail;
 this.phOneNumber= phoneNumber;
 }
 public String toString(){
 return "编号："+id+" 姓名："+name+" 性别："+sex+" 通讯地址："+address+" 邮箱地址："+e_mail+" 电话："+phoneNumber;
 }

 /**
 * 添加功能
 **/
 public static void addFunction(){//添加功能
 Infro infro = new Infro("","","","","","");
 System.out.println("请输入添加的数据：");
 Scanner in = new Scanner(System.in);
 System.out.println("输入编号：");
 infro.id = in.next();
 System.out.println("输入姓名：");
 infro.name = in.next();
 System.out.println("输入性别：");
 infro.sex = in.next();
 System.out.println("输入通讯地址：");
 infro.address = in.next();
 System.
 out.println("输入邮箱地址：");
 infro.e_mail = in.next();
 System.out.println("输入电话：");
 infro.phOneNumber= in.next();
 list.add(index,infro);
 index++;
 if(list.isEmpty()){
 System.out.println("数据添加失败啦");
 }else{
 System.out.println("数据添加成功啦");
 len++;//list集合长度加一
// System.out.println(list.get(0).toString());
 }

 }
// public static void deleteFunction(){//删除功能
// System.out.println("输入要删除的联系人的编号");
// Scanner in_2 = new Scanner(System.in);
// String d1 = in_2.nextLine();
// for(int a= 0; a it = list.iterator();
 while (it.hasNext()){
 Infro infro = it.next();
 if (infro.id.equals(d1)){
 it.remove();
 --index;//一定要加这个，否则当做了删除操作再做添加操作的时候会出现异常（类似于指针，栈）
 System.out.println("删除完毕"+"此时通讯录记录条数为：" + --len);
 }
 }
 }
 /**
 * 修改功能
 **/
 public static void reditFunction(){
 System.out.println("输入要修改的通讯录的Id");
 Scanner in_r = new Scanner(System.in);
 String r1 = in_r.nextLine();
 for(int a = 0; a 
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