アドレス帳管理システムの Java 実装チュートリアル

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<Infro> 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<len;a++){
// if(d1.equals(list.get(a).id)){
// list.remove(list.get(a));
// len --; 
// }
// }
// }
 /**
 * 删除功能
 **/
 public static void deleteFunction(){
 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();
 java.util.Iterator<Infro> 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 < len;a++){
 if(r1.equals(list.get(a).id)){
 System.out.println("输入修改后的姓名：");
 String name_1 = in_r.next();
 list.get(a).name = name_1;
 System.out.println("输入修改后的性别：");
 String sex_1 = in_r.next();
 list.get(a).sex = sex_1;
 System.out.println("输入修改后的通讯地址：");
 String address_1 = in_r.next();
 list.get(a).address = address_1;
 System.out.println("输入修改后的邮箱地址：");
 String e_mail_1 = in_r.next();
 list.get(a).e_mail = e_mail_1;
 System.out.println("输入修改后的电话：");
 String phoneNumber_1 = in_r.next();
 list.get(a).phoneNumber = phoneNumber_1;
 System.out.println("数据修改完毕");
 }
 }
 }
 /**
 * 查询功能
 **/
 public static void searchFunction() throws Exception{//查询功能
 System.out.println("请输入要查询的姓名：");
 Scanner in_1 = new Scanner(System.in);
 String s1=in_1.nextLine();
 for(int a= 0; a<len;a++){//切记，，这里不能用a<=list.seze(),否则会数组越界异常
 if(s1.equals(list.get(a).name)){
 System.out.println(list.get(a).toString());
 }
 }
 }

 /**
 * 显示功能
 **/
 public static void showFunction(){
 for(int i = 0 ;i<len;i++){
 System.out.println(list.get(i).toString());
 }
 }
 /**
 * 保存功能
 **/
 public static void writeFunction() throws IOException{
 FileWriter writer = new FileWriter("通讯录管理.txt");
 for(int i = 0 ;i<len;i++){
 String []strwriter = new String[len];
 strwriter[i]=list.get(i).toString();
 writer.write(strwriter[i]);
 writer.write("\r\n");
 System.out.println("成功写入一行数据到 通讯录管理.txt 中");
 }
 writer.close();//关闭写入流，释放资源
 }
 /**
 * 读取功能
 **/
 public static void readFunction() throws IOException{
 FileReader reader = new FileReader("通讯录管理.txt");
 BufferedReader br = new BufferedReader(reader);
 String str;
 while((str = br.readLine()) != null){//每次读取一行文本，判断是否到达文件尾
 System.out.println(str);
 }
 br.close();
 }
}


public class Demo extends JFrame {

 /**
 * 界面设计
 **/
 public Demo(){
 Container c = getContentPane(); //定义一个顶级容器c
 JPanel jp = new JPanel(); //新建JPanel面板--jp
 JButton button1 = new JButton("新建联系人");
 JButton button2 = new JButton("删除联系人");
 JButton button3 = new JButton("编辑联系人");
 JButton button4 = new JButton("查找联系人");
 JButton button5 = new JButton("显示所有联系人");
 JButton button6 = new JButton("保存联系人到本地");
 JButton button7 = new JButton("读取本地联系人");
 jp.setLayout(new GridLayout(2,4,5,5));//新建网格布局管理器（行数，列数，组件间的水平垂直间距）
 jp.add(button1);
 jp.add(button2);
 jp.add(button3);
 jp.add(button4);
 jp.add(button5);
 jp.add(button6);
 jp.add(button7);
 c.add(jp);//将JPanel面板jp添加到顶级容器c中
 setSize(600,500);
 setTitle("*通 讯 录 管 理 系 统*");
 setVisible(true);
 setResizable(false);//窗体大小由程序员决定，用户不能自由改变大小
 setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);


 /**
 *按键响应
 * 
 **/
 button1.addActionListener(new ActionListener(){//添加功能实现
 public void actionPerformed(ActionEvent arg0){
 Infro.addFunction();
 }
 });
 button2.addActionListener(new ActionListener(){//删除功能实现
 public void actionPerformed(ActionEvent arg0){
 Infro.deleteFunction();
 }
 });
 button3.addActionListener(new ActionListener(){//修改功能实现
 public void actionPerformed(ActionEvent arg0){
 Infro.reditFunction();
 }
 });
 button4.addActionListener(new ActionListener(){//查询功能实现
 public void actionPerformed(ActionEvent arg0){
 try {
 Infro.searchFunction();
 } catch (Exception e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 }
 });
 button5.addActionListener(new ActionListener(){//显示功能实现
 public void actionPerformed(ActionEvent arg0){
 Infro.showFunction();
 }
 });
 button6.addActionListener(new ActionListener(){//保存功能实现
 public void actionPerformed(ActionEvent arg0){
 try {
 Infro.writeFunction();
 } catch (IOException e) {
 e.printStackTrace();
 }
 }
 });
 button7.addActionListener(new ActionListener(){//读取功能实现
 public void actionPerformed(ActionEvent arg0){
 try {
 Infro.readFunction();
 } catch (IOException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 }
 });
 }

 public static void main(String[] args) {
 // TODO Auto-generated method stub
 new Demo();
 Infro a = new Infro("", "", "", "", "", "");
 }

}