java新建聯(lián)系人代碼 java新建聯(lián)系人代碼是什么

Java編寫一個(gè)班級(jí)通訊錄

import?java.util.ArrayList;

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import?java.util.List;

import?java.util.Scanner;

public?class?AddressList?{

static?Scanner?scanner?=?new?Scanner(System.in);

static?ListEntity?enlist?=?new?ArrayListEntity();

public?static?void?main(String[]?args)?{

int?input;

AddressList?addre?=?new?AddressList();

System.out.println("===============歡迎使用**通訊錄===============");

do{

System.out.println("1、插入聯(lián)系人");

System.out.println("2、刪除練習(xí)人");

System.out.println("3、修改聯(lián)系人");

System.out.println("4、查詢練習(xí)人");

System.out.println("5、查詢?nèi)柯?lián)系人");

System.out.println("0、退出系統(tǒng)");

System.out.println("請(qǐng)選擇:");

input?=?scanner.nextInt();

switch(input){

case?1:

Entity?e?=?new?Entity();

e.id?=?enlist.size();

System.out.println("請(qǐng)輸入聯(lián)系人姓名:");

e.name?=?scanner.next();

System.out.println("請(qǐng)輸入聯(lián)系方式:");

e.number?=?scanner.nextInt();

addre.add(e);

System.out.println("插入成功!");

break;

case?2:

System.out.println("請(qǐng)輸入要?jiǎng)h除聯(lián)系人編號(hào):");

int?num?=?scanner.nextInt();

if(addre.delete(num))

System.out.println("刪除成功!");

else

System.out.println("刪除失敗,請(qǐng)確認(rèn)信息是否正確!");

break;

case?3:

System.out.println("請(qǐng)輸入要修改人編號(hào):");

int?unum?=?scanner.nextInt();

addre.update(unum);

System.out.println("修改完成!");

break;

case?4:

System.out.println("請(qǐng)輸入要查詢?nèi)诵彰?);

String?name?=?scanner.next();

Entity?ent?=?addre.select(name);

if(ent!=null){

System.out.println(name+"的聯(lián)系方式為:"+ent.number);

}else{

System.out.println("查無此人!");

}

break;

case?5:

for(Entity?entit:enlist){

System.out.println(entit.name+"的聯(lián)系方式為:"+entit.number);

}

break;

}

}while(input!=0);

System.out.println("謝謝使用!");

}

/*

?*?添加聯(lián)系人

?*/

public?boolean?add(Entity?e){

enlist.add(e);

return?true;

}

/*

?*?刪除聯(lián)系人

?*/

public?boolean?delete(int?num){

if(numenlist.size())

return?false;

else

enlist.remove(num);

return?true;

}

/*

?*?修改聯(lián)系人

?*/

public?void?update(int?num){

if(numenlist.size())

System.out.println("查無此人!");

else{

Entity?e?=?new?Entity();

e.id?=?num;

System.out.println("請(qǐng)輸入聯(lián)系人姓名:");

e.name?=?scanner.next();

System.out.println("請(qǐng)輸入聯(lián)系方式:");

e.number?=?scanner.nextInt();

enlist.set(num,?e);

}

}

/*

?*?查詢指定聯(lián)系人電話

?*/

public?Entity?select(String?name){

Entity?en?=?null;

for(Entity?e?:?enlist){

if(e.name.equals(name))

en?=?e;

}

return?en;

}

}

class?Entity{

public?int?id;//編號(hào)

public?String?name;//姓名

public?int?number;//聯(lián)系電話

}

JAVA通訊錄 求一個(gè)JAVA編寫的通訊錄,基本的就可以。

具體方法如下:

1、定義封裝一條記錄的實(shí)體類

2、根據(jù)實(shí)際系統(tǒng)容量,定義一個(gè)數(shù)組

3、完成系統(tǒng)中顯示全部記錄的邏輯

4、完成系統(tǒng)中添加一條記錄的邏輯

5、完成系統(tǒng)中刪除一條記錄的邏輯

6、完成系統(tǒng)中修改一條記錄的邏輯

7、全部代碼:

import java.util.Scanner;

class Contact {

String cellPhone;

String name;

}

public class Main {

private static void menu () {

System.out.println("************** 菜單 ******"

+ "************");

System.out.println(" 1.顯示全部通訊錄");

System.out.println(" 2.增加一條記錄");

System.out.println(" 3.刪除一條記錄");

System.out.println(" 4.修改一條記錄");

System.out.println(" 0.退出");

}

public static void main(String[] args) {

Scanner scn = new Scanner(System.in);

Contact[] contacts = new Contact[200];

int size = 0;

String cmd = "";

do {

menu();

System.out.print("請(qǐng)輸入你得選擇:(0-4)");

cmd = scn.nextLine();

if (cmd.equals("1")) {

if (size == 0)

System.out.println("系統(tǒng)當(dāng)前無記錄!");

else

for (int i = 0; i size; i++) {

System.out.println(contacts[i].name + ":"

+ contacts[i].cellPhone);

}

} else if (cmd.equals("2")) {

System.out.print("請(qǐng)輸入手機(jī)號(hào):");

String cellphone = scn.nextLine();

System.out.print("請(qǐng)輸入姓名:");

String name = scn.nextLine();

Contact contact = new Contact();

contact.cellPhone = cellphone;

contact.name = name;

if (size contacts.length) {

contacts[size++] = contact;

System.out.println("添加成功!");

} else {

System.out.println("你最多只能添加" +

contacts.length + "條記錄");

}

} else if (cmd.equals("3")) {

System.out.print("請(qǐng)輸入要?jiǎng)h除的手機(jī)號(hào):");

String cellphone = scn.nextLine();

int index = -1;

for (int i = 0; i size i contacts.length;

i++) {

if (contacts[i].cellPhone.equals(cellphone)) {

index = i;

break;

}

}

if (index == -1) {

System.out.println("該記錄不存在!");

} else {

for (int i = index; i size; i++) {

contacts[index] = contacts[index + 1];

}

contacts[size - 1] = null;

size--;

System.out.println("刪除成功!");

}

} else if (cmd.equals("4")) {

System.out.print("請(qǐng)輸入要修改的手機(jī)號(hào):");

String cellphone = scn.nextLine();

int index = -1;

for (int i = 0; i size i contacts.length;

i++) {

if (contacts[i].cellPhone.equals(cellphone)) {

index = i;

break;

}

}

if (index == -1) {

System.out.println("該記錄不存在!");

} else {

System.out.print("請(qǐng)輸入姓名:");

String name = scn.nextLine();

contacts[index].name = name;

}

}

} while (!cmd.equals("0"));

System.out.println("退出成功!");

scn.close();

System.exit(0);

}

}

實(shí)現(xiàn)一個(gè)小型通訊錄。Java

Friend類:public class Friend {

/*

* 姓名

*/

private String name;

/*

* 電話

*/

private String telephone;

/*

* 郵箱

*/

private String email;

/*

* 公司

*/

private String company; public String getName() {

return name;

} public void setName(String name) {

this.name = name;

} public String getTelephone() {

return telephone;

} public void setTelephone(String telephone) {

this.telephone = telephone;

} public String getEmail() {

return email;

} public void setEmail(String email) {

this.email = email;

} public String getCompany() {

return company;

} public void setCompany(String company) {

this.company = company;

} public String toString() {

StringBuffer str = new StringBuffer(); str.append("姓名:" + name).append("\n");

str.append("電話:" + telephone).append("\n");

str.append("郵箱:" + email).append("\n");

str.append("公司:" + company).append("\n");

str.append("-----------------------------------------\n");

return str.toString();

}

}AddFriend類:public class AddFriend { /**

* 主方法 程序的入口

*/

public static void main(String[] args) {

ListFriend friendList = new ArrayListFriend();

char isGo = 'Y';

int i = 0;

do {

Friend friend = new Friend();

System.out.println("請(qǐng)輸入第" + (i + 1) + "位朋友的姓名:");

InputStreamReader reader = new InputStreamReader(System.in);

String str = "";

try {

str = (new BufferedReader(reader)).readLine();

} catch (IOException e) {

e.printStackTrace();

}

friend.setName(str); System.out.println("請(qǐng)輸入第" + (i + 1) + "位朋友的電話:"); try {

str = (new BufferedReader(reader)).readLine();

} catch (IOException e) {

e.printStackTrace();

}

if (str.matches("\\d*") str.length() == 11) {// 判斷用戶輸入的電話是否符合標(biāo)準(zhǔn)

friend.setTelephone(str);

} else {

System.out.println("電話號(hào)碼輸入有誤,請(qǐng)重新輸入!");

continue;

} System.out.println("請(qǐng)輸入第" + (i + 1) + "位朋友的郵箱:"); try {

str = (new BufferedReader(reader)).readLine();

} catch (IOException e) {

e.printStackTrace();

}

friend.setEmail(str); System.out.println("請(qǐng)輸入第" + (i + 1) + "位朋友的公司:"); try {

str = (new BufferedReader(reader)).readLine();

} catch (IOException e) {

e.printStackTrace();

}

friend.setCompany(str); friendList.add(friend); i++; System.out.println("是否繼續(xù)添加?(Y/N):");

String go = "";

try {

go = (new BufferedReader(reader)).readLine();

} catch (IOException e) {

e.printStackTrace();

}

isGo = go.charAt(0);

} while (isGo == 'Y' || isGo == 'y'); for (int j = 0; j friendList.size(); j++) {

System.out.println(friendList.get(j).toString());

}

}

}

java通訊錄全部代碼!

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.FileReader;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.Scanner;

public class AddList {

private String filePath = "";

private String bakPath = "";

private String content = "";

Scanner sc = new Scanner(System.in);

public String readFile(){

content = "";

if (isNull(filePath)) {

System.out.println("文件存儲(chǔ)路徑:");

filePath = sc.nextLine();

}

File file = new File(filePath);

FileReader fr = null;

try {

if (file.exists()) {

fr = new FileReader(file);

char[] chars = new char[1024];

int n = 0;

while((n = fr.read(chars)) != -1){

String string = new String(chars, 0, n);

content = content + string;

}

} else {

System.out.println("文件不存在");

}

} catch (Exception e) {

e.printStackTrace();

} finally {

if (fr != null) {

try {

fr.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

return content;

}

public void writeFile(String path){

File file = new File(path);

FileOutputStream fos = null;

mkDirs(path);

try {

fos = new FileOutputStream(file);

BufferedOutputStream bos = new BufferedOutputStream(fos);

PrintWriter pw = new PrintWriter(bos, true);

pw.print(content);

pw.flush();

} catch (FileNotFoundException e) {

e.printStackTrace();

} finally {

if (fos != null) {

try {

fos.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

public void writeFile(){

if (isNull(filePath)) {

System.out.println("文件存儲(chǔ)路徑:");

filePath = sc.nextLine();

}

File file = new File(filePath);

FileOutputStream fos = null;

mkDirs(filePath);

try {

fos = new FileOutputStream(file);

BufferedOutputStream bos = new BufferedOutputStream(fos);

PrintWriter pw = new PrintWriter(bos, true);

pw.print(content);

pw.flush();

} catch (FileNotFoundException e) {

e.printStackTrace();

} finally {

if (fos != null) {

try {

fos.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

public void mkDirs(String filepath){

if (filepath.indexOf("\\") != -1) {

filepath = filepath.replaceAll("\\", "/");

}

int n = filepath.indexOf("http://");

String path = filepath.substring(0, n) + "http://";

filepath = filepath.substring(filepath.indexOf("http://") + 1, filepath.length());

String[] files = filepath.split("/");

for (int i = 0; i files.length - 1; i++) {

path = path + files[i];

File file = new File(path);

if (!file.exists()) {

file.mkdir();

}

}

}

public void addImfor(){

System.out.println("--------增加記錄---------");

String name = "";

String tel = "";

String email = "";

content = readFile();

while(true){

System.out.println("姓名:");

name = sc.next();

System.out.println("電話:");

tel = sc.next();

System.out.println("Email:");

email = sc.next();

content = content + name + "" + tel + "" + email +"==";

System.out.println("0、Exit 1、繼續(xù)");

int i = sc.nextInt();

if (i == 0) {

break;

}

}

writeFile();

}

public void deleteImfor(){

System.out.println("---------刪除記錄---------");

String name = "";

String[] imfors = null;

content = readFile();

while(true){

System.out.println("你要?jiǎng)h除的姓名是:");

name = sc.next();

if (content.indexOf(name) != -1) {

imfors = content.split("==");

for (int i = 0; i imfors.length; i++) {

if (imfors[i].indexOf(name) != -1) {

imfors[i] = "";

}

}

求Java通訊錄管理程序,要編譯好的。要求數(shù)據(jù)存在文本文件中,功能包括聯(lián)系人管理(新增,刪除,修改

#includestdio.h?/*I/O函數(shù)*/?

#includeprocess.h/*包含exit函數(shù)*/?

#includestring.h/*字符串函數(shù)*/?

struct?person/*定義一個(gè)結(jié)構(gòu)體,結(jié)構(gòu)體內(nèi)元素為數(shù)組*/?

{?

char?name[10];/*姓名*/?

char?number[15];/*學(xué)號(hào)*/?

char?tel[15];/*電話*/?

char?addr[30];/*地址*/?

};?

char?filename[12];?

FILE?*fp;/*定義一個(gè)指針*/?

void?creat();/*創(chuàng)建一個(gè)通訊簿*/?

void?output();/*輸出通訊錄中所含資料*/?

void?append();/*添加函數(shù)*/?

void?search();/*查找函數(shù)*/?

void?Delete();/*刪除函數(shù)*/?

void?modify();/*修改函數(shù)*/?

/*以下是主函數(shù)*/?

main()?

{?

int?m;/*定義一個(gè)整數(shù)*/?

creat();????

while(1)/*括號(hào)中為1代表無限循環(huán)*/?

{?

printf("\n\n添加同學(xué)地址,請(qǐng)按1");?

printf("\n查找同學(xué)地址,請(qǐng)按2");?

printf("\n修改同學(xué)地址,請(qǐng)按3");?

printf("\n刪除原來地址,請(qǐng)按4");?

printf("\n輸出所有地址,請(qǐng)按5");?

printf("\n退出本通訊錄,請(qǐng)按0\n");?

scanf("%d",m);?

if(m=0m=5)?

{?

switch(m)/*調(diào)用主菜單函數(shù),返回值整數(shù)作開關(guān)語句的條件*/?

{?

case?1:?append();/*往通訊錄中添加*/?

break;?

case?2:?search();/*在通訊錄中查找*/?

break;?

case?3:?modify();/*修改通訊錄中資料*/?

break;?

case?4:?Delete();/*刪除通訊錄中資料*/?

break;?

case?5:?output();/*輸出通訊錄中所有名單*/?

break;?

case?0:?exit(0);/*退出運(yùn)行程序*/?

}?

printf("\n\n操作完畢,請(qǐng)?jiān)俅芜x擇!");?

}?

else?

printf("\n\n選擇錯(cuò)誤,請(qǐng)?jiān)俅芜x擇!");?

}?

}?

void?output()?

{?

struct?person?one;?

if((fp=fopen(filename,"r"))==NULL)/*用輸入打開一個(gè)文本文*/?

{?

printf("\n不能打開通訊簿!");?

exit(0);?

}?

printf("\n\n%12s\n","通?訊?簿");?

while(!feof(fp))/*檢驗(yàn)fp所指文件是否結(jié)束,此為一個(gè)循環(huán)語句*/?

{?

fscanf(fp,"%s%s%s%s\n",one.name,one.number,one.tel,one.addr);/*從fp所指文件中讀出數(shù)據(jù)*/??????printf("\n%-10s%-15s%-15s%-30s\n",one.name,one.number,one.tel,one.addr);/*輸出上面讀出數(shù)據(jù)*/?

}?

fclose(fp);/*關(guān)閉所指文件,釋放文件緩沖區(qū),并返回值*/?

}?

/*****************添加函數(shù)*******************************/?

void?append()?

{?

struct?person?one;?

if((fp=fopen(filename,"a"))==NULL)/*向二進(jìn)制文本尾追加數(shù)據(jù)*/?

{?

printf("\n不能打開通訊簿!");?

exit(0);?

}?

printf("\n請(qǐng)輸入添加的姓名、電話號(hào)碼及住址\n");

javaweb 做一個(gè)通訊錄的小項(xiàng)目 求源代碼 急求。

先設(shè)計(jì)數(shù)據(jù)庫中通訊錄表格(字段有:id,聯(lián)系人姓名,手機(jī)號(hào),備注),然后,hebinate實(shí)現(xiàn)數(shù)據(jù)庫表到j(luò)avabean的映射,同時(shí)也會(huì)生成對(duì)通訊錄表格的增刪改查的基本sql語句對(duì)應(yīng)的接口。然后你再寫一個(gè)Servlet,連接頁面自己數(shù)據(jù)庫操作接口即可

分享名稱:java新建聯(lián)系人代碼 java新建聯(lián)系人代碼是什么
文章轉(zhuǎn)載:http://muchs.cn/article20/docdejo.html

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