JAVA电话本系统

package com.sunhang.phonebook;

import java.text.ParseException;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class PhoneBook {


//存放联系人的容器
List<Contacts> list = new ArrayList<Contacts>();

/**
* 增加联系人
*/
public void newContacts() throws ParseException{

try{
Scanner sc = new Scanner(System.in);
System.out.println("输入姓名:");
String name = sc.next();
System.out.println("输入电话:");
String num = sc.next();
System.out.println("输入生日:");
String birth = sc.next();
System.out.println("输入email:");
String email = sc.next();
System.out.println("输入地址:");
String location = sc.next();
System.out.println("输入关系:");
String relation = sc.next();

//将数据保存在联系人对象当中
Contacts c = new Contacts();
c.setName(name);
c.setNum(num);
c.setBirth(birth);
c.setEmail(email);
c.setLocation(location);
c.setRelation(relation);

list.add(c);
System.out.println("联系人保存成功");
}catch(NumberFormatException e){
System.out.println("编号必须为数字");
}
}
/**
* 删除联系人
*/
public void delContacts(){
try{
Scanner sc = new Scanner(System.in);
System.out.println("输入要删除的编号: ");
String sid = sc.next();
int id = Integer.parseInt(sid);

//判断用户是否存在
int index = -1;
for (int i = 0; i < list.size(); i++) {
if (id == list.get(i).getId()) {
index = i;
break;
}
}
if (index == -1) {
System.out.println("输入的联系人编号不存在,请重新输入.");
}else {
//删除集合中的联系人
list.remove(index);
System.out.println("联系人删除成功.");
}
}catch(NumberFormatException e){
System.out.println("编号必须为数字");
}


}
/**
* 查看联系人
*/
public void showContacts(){
Scanner sc = new Scanner(System.in);
System.out.println("输入要查看的联系人编号: ");
String sid = sc.next();
int id = Integer.parseInt(sid);
//判断联系人是否存在
int index = -1;
for (int i = 0; i < list.size(); i++) {
if (id == list.get(i).getId()) {
index = i;
break;
}
}
if (index == -1) {
System.out.println("输入的联系人不存在,请重新输入: ");
}else {
System.out.println("编号: " + list.get(index).getId() +
"姓名: " + list.get(index).getName() +
"电话: " + list.get(index).getNum());
}
}
/**
* 查看全部联系人
*/
public void showContactsAll(){
if (list.isEmpty()) {
System.out.println("没有联系人,请添加");
}else{
for (Contacts i : list) {
System.out.println("编号: " + i.getId() +
"姓名: " + i.getName());
}
}
}
/**
* 查看联系人详细信息
*/
public void showContactsDetils(){
Scanner sc = new Scanner(System.in);
System.out.println("请输入要查看的联系人编号: ");
String sid = sc.next();
int id = Integer.parseInt(sid);

//判断联系人是否存在
int index = -1;
for (int i = 0; i < list.size(); i++) {
if (id == list.get(i).getId()) {
index = i;
break;
}
}
if (index == -1) {
System.out.println("输入的联系人不存在,请重新输入: ");
}else {
System.out.println(list.get(index));
}
}

}

package com.sunhang.phonebook;

import java.util.Scanner;

public class CeShiCeng {
public static void main(String[] args) {

PhoneBook pb = new PhoneBook();
System.out.println("-------欢迎使用航哥电话本-------");


while(true){
System.out.println("**************************");
System.out.println("* 请选择功能选项: *");
System.out.println("* 1.新建联系人 *");
System.out.println("* 2.删除联系人 *");
System.out.println("* 3.查看联系人 *");
System.out.println("* 4.查看所有联系人 *");
System.out.println("* 5.查看联系人详细信息 *");
System.out.println("* 0.退出 *");
System.out.println("***************************");
Scanner sc = new Scanner(System.in);
try{
int key = sc.nextInt();
switch (key) {
case 0:
System.out.println("谢谢使用,再见!");
return;
case 1:
pb.newContacts();
break;
case 2:
pb.delContacts();
break;
case 3:
pb.showContacts();
break;
case 4:
pb.showContactsAll();
break;
case 5:
pb.showContactsDetils();
break;

default:
System.out.println("输入的数字有误,请重新输入!");
break;
}
}catch(Exception e){
System.out.println("请输入数字...");
}
}


}
}

package com.sunhang.phonebook;

import java.util.Date;

public class Contacts {

private int id;
private String name;
private String num;
private String birth;
private String location;
private String email;
private String relation;


public int getId() {
return id;
}

public void setId(int id) {
this.id = id;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public String getNum() {
return num;
}

public void setNum(String num) {
this.num = num;
}

public String getBirth() {
return birth;
}

public void setBirth(String birth) {
this.birth = birth;
}

public String getLocation() {
return location;
}

public void setLocation(String location) {
this.location = location;
}

public String getEmail() {
return email;
}

public void setEmail(String email) {
this.email = email;
}

public String getRelation() {
return relation;
}

public void setRelation(String relation) {
this.relation = relation;
}

public String toString(){
return "ID: " + id + "姓名: " + name +
"电话: " + num + "生日: " +
"email: " + email + "地址: " + location +
"关系: " + relation;
}
}

原文：http://www.cnblogs.com/javacoding/p/5357867.html