/*1、类与对象的基础题：
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1）编程实现：以电话Phone为父类（例：电话有本机号码、打电话、接电话等属性和功能，
当然还有一些其它的特性）， 移动电话Mobilephone和固定电话Fixedphone为两个子类，
并使移动电话实现接口：可移动Moveable。固定电话又有子类：无绳电话Cordlessphone。
设计并定义这四个类（Phone、Mobilephone、Fixedphone、Cordlessphone）和一个接口（Moveable），
明确它们的继承关系，定义子类时给出子类有别于父类的新特性。
*/
class Phone {//定义一个Phone类，其属性为电话号码，方法有打电话和接电话
private String phonenum;
public void callPhone() {}
//无参的构造方法
Phone() {}
//有参的构造方法 以后相似
Phone(String s) {
System.out.println("phonenum = " + s);
}
public void acceptPhone() {
System.out.println("父类方法");
}
}
//定义Mobilephone类，从Phone类继承，实现了Moveable接口
//实现接口要重写其中的全部方法，因为没有给出Moveable接口中的方法，所以就没写,即编译也不会成功，若想看到结果把下面的implements Moveable 注释掉
class MobilePhone extends Phone implements Moveable {
private String cellnum;
public void callPhone() {}//重写父类方法
public void setRing() {} //设置铃声
public void playGame() {} //玩游戏
MobilePhone(String s,String s1) {
super(s);
System.out.println("cellphone = " + s1);
}
}
//定义Fixedphone类，从Phone类继承
class FixedPhone extends Phone {
private String fixednum;
private String s;
FixedPhone() {}
FixedPhone(String s,String s2) {
super(s);
System.out.println("fixednum = " + s2);
}
public void acceptPhone() {
System.out.println("实现了多态性");
}//重写父类方法
public void selectNum() {
}
}
//定义Fixedphone子类
class CordlessPhone extends FixedPhone {
private char num;
public void setPassword() {} //设置密码
CordlessPhone() {
super();
}
CordlessPhone(String s2,String s3,char s4) {
super(s2,s3);
System.out.println("num = " + s4);
}
}
/*2）声明测试类：声明Phone类的数组（含5个元素），
生成五个对象存入数组：其中二个Phone类的对象、一个Mobilephone类的对象、一个Fixedphone类的对象和一个Cordlessphone类的对象，
打印输出每个对象的某个成员变量。将一个父类的引用指向一个子类对象，用这个塑型后的对象来调用某个方法实现多态性。 */
public class Test {
public static void main(String[] args) {
Phone[] p = new Phone[5];
p[0] = new Phone("123");
p[1] = new Phone("456");
p[2] = new MobilePhone("123456","138xxxxxxxxx");
p[3] = new FixedPhone("5861","5861xx");
p[4] = new CordlessPhone("5861xxx","12333",'5');
Phone p1 = new FixedPhone();//将一个父类引用指向子类对象
p1.acceptPhone();//调用方法 实现多态性
}
}
==================================
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class PhoneBook {
// 代表有多少条记录
private int size = 0;
// 用来记录信息的数组
private Phone[] phones = new Phone[100];
private String filename = "phonebook.txt";
public PhoneBook() {
try {
read();
} catch (IOException e) {
}
}
private void read() throws IOException {
File f = new File(filename);
if (!f.exists()) {
return;
}
BufferedReader br = new BufferedReader(new FileReader(filename));
String line = null;
while ((line = br.readLine()) != null) {
if (line.trim().length() 0) {
Phone phone = new Phone(line);
addPhone(phone);
}
}
br.close();
}
public void store() throws IOException {
File f = new File(filename);
BufferedWriter bw = new BufferedWriter(new FileWriter(filename));
for (Phone phone : phones) {
if (phone == null) {
continue;
}
String str = phone.name + "::" + phone.number + "::" + phone.notes;
bw.write(str + "\r\n");
}
bw.close();
}
public void addPhone(Phone phone) {
phones[size++] = phone;
}
public Phone getPhone(String name) {
for (Phone phone : phones) {
if (phone == null) {
continue;
}
if (phone.name.equalsIgnoreCase(name)) {
return phone;
}
}
return null;
}
public Phone[] getPhones() {
return phones;
}
}
class Phone {
String name, number, notes;
public Phone() {
}
public Phone(String line) {
String[] strs = line.split("::");
name = strs[0];
number = strs[1];
notes = strs[2];
}
public String toString() {
return String.format("-- %s\r\n-- %s\r\n-- %s", name, number, notes);
}
}
=================================================
import java.io.IOException;
import java.util.Scanner;
public class MainClass {
private static PhoneBook book = new PhoneBook();
public static void main(String[] args) {
getCommand();
}
public static void getCommand() {
String cmd = getString("Command: ");
if (cmd.startsWith("e ")) {
add(cmd.substring(cmd.indexOf(' ') + 1));
try {
book.store();// 添加一个就记录一次文件
} catch (IOException e) {
e.printStackTrace();
}
} else if (cmd.startsWith("f ")) {
find(cmd.substring(cmd.indexOf(' ') + 1));
} else if (cmd.equals("l")) {
list();
} else if (cmd.startsWith("q")) {
quit();
} else {
System.out.println("unknown command!");
}
getCommand();
}
public static void add(String name) {
Phone phone = new Phone();
phone.name = convert(name);// 名字转换
phone.number = getString("Enter number: ");
phone.notes = getString("Enter notes: ");
book.addPhone(phone);
}
public static void find(String name) {
Phone phone = book.getPhone(name);
if (phone != null) {
System.out.println(phone);
} else {
System.out.println("** No entry with code " + name);
}
}
public static void list() {
for (Phone phone : book.getPhones()) {
if (phone != null) {
System.out.println(phone);
}
}
}
public static void quit() {
try {
book.store();
} catch (IOException e) {
}
System.exit(0);
}
public static String getString(String tip) {
System.out.print(tip);
Scanner sc = new Scanner(System.in);
return sc.nextLine();
}
private static String convert(String name) {
if (name != null name.length() 0) {
return name.substring(0, 1).toUpperCase()
+ name.substring(1).toLowerCase();
}
return null;
}
}
public class PhoneData {
private String name;
private String phonenumber;
private int ID;
PhoneData(String name,String phonenumber,int ID){
this.setName(name);
this.setPhonenumber(phonenumber);
this.setID(ID);
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPhonenumber() {
return phonenumber;
}
public void setPhonenumber(String phonenumber) {
this.phonenumber = phonenumber;
}
public int getID() {
return ID;
}
public void setID(int iD) {
ID = iD;
}
}
import java.io.*;
public class PhoneBook {
int count=0;//计数器
String name;
String phonenumber;
int ID;
PhoneData[] data=new PhoneData[100];
//初始化
PhoneBook(){
this.name="张三";
this.phonenumber="12587968541";
this.ID=1;
data[0]=new PhoneData(name,phonenumber,ID);
data[1]=new PhoneData("li","245879",2);
count=2;
}
//按电话查找
public void searhByPhoneNum(String phonenumber){
for(int i=0;icount;i++)
if(phonenumber.equals(data[i].getPhonenumber())){
System.out.println(data[i].getName());
System.out.println(data[i].getID());
}
else
System.out.println("没有该信息！");
}
//按编号查找
public void serchByPhoneid(int ID){
for(int i=0;icount;i++)
if(ID==(data[i].getID())){
System.out.println(data[i].getName());
System.out.println(data[i].getPhonenumber());
}
else
System.out.println("没有该信息！");
}
//按姓名查找
public void searchByName(String name){
for(int i=0;icount;i++)
if(name.equals(data[i].getName())){
System.out.println(data[i].getPhonenumber());
System.out.println(data[i].getID());
}
else
System.out.println("没有该信息！");
}
//添加通讯录
public void addinfo(String name,String phonenumber,int ID){
if(count100){
System.out.println("容量已满，不能再存储了！");
}
else{
data[count++]=new PhoneData(name,phonenumber,ID);
}
}
//删除指定编号
public void deleteinfo(int id){
for(int i=0;icount;i++)
if(id==data[i].getID()){
System.out.println(data[i].getName());
System.out.println(data[i].getPhonenumber());
for(int j=i;jcount-1;j++){
data[j]=data[j+1];
}
count--;
System.out.println("已删除！");
}
else
System.out.println("没有该信息！");
}
//显示所有号码
public void disp(){
if(count==0)
System.out.println("没有信息！");
else
for(int i=0;icount;i++){
System.out.println(data[i].getName());
System.out.println(data[i].getPhonenumber());
System.out.println(data[i].getID());
}
}
//显示菜单
public static void dispMenu(){
System.out.println("1.按姓名查找");
System.out.println("2.按ID查找");
System.out.println("3.按号码查找");
System.out.println("4.添加通讯录");
System.out.println("5.删除通讯录");
System.out.println("6.显示所有号码");
System.out.println("请输入数字：");
}
public static void main(String []arg)throws IOException{
PhoneBook phonebook=new PhoneBook();
BufferedReader readerStream=new BufferedReader(new InputStreamReader(System.in));
while(true){
PhoneBook.dispMenu();
int operater=Integer.parseInt(readerStream.readLine());
switch(operater){
case 1:{
System.out.println("请输入姓名");
String name=readerStream.readLine();
phonebook.searchByName(name);
}
break;
case 2:{
System.out.println("请输入ID");
int ID=Integer.parseInt(readerStream.readLine());
phonebook.serchByPhoneid(ID);
}
break;
case 3:{
System.out.println("请输入号码");
String phonenumber=readerStream.readLine();
phonebook.searhByPhoneNum(phonenumber);
}
break;
case 4:{
System.out.println("请输入信息");
System.out.println("请输入ID");
int ID=Integer.parseInt(readerStream.readLine());
System.out.println("请输入姓名");
String name=readerStream.readLine();
System.out.println("请输入号码");
String phonenumber=readerStream.readLine();
phonebook.addinfo(name, phonenumber, ID);
}
break;
case 5:{
System.out.println("请输入ID");
int ID=Integer.parseInt(readerStream.readLine());
phonebook.deleteinfo(ID);
}
break;
case 6:
phonebook.disp();
break;
}
}
}
}
代码基本如上，基本实现了功能，但还是有 点不足的。。
只有最基本的功能,用户界面很粗糙,联系人明细也只有名字和一个电话,试着修改/增加一些功能以及配合数据库使用吧.
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextArea;
@SuppressWarnings("serial")
public class PhoneBookDemo extends JFrame implements ActionListener,
PhoneBookDemoConstants {
private PhoneBook phoneBook;
JTextArea displayArea;
public PhoneBookDemo () {
phoneBook = new PhoneBookImpl();
displayArea = new JTextArea(20, 40);
displayArea.setEditable(false);
BoxLayout layout = new BoxLayout(getContentPane(), BoxLayout.Y_AXIS);
JPanel buttonPanel = new JPanel();
JButton addButton = new JButton(ADD_BUTTON_DISPLAY);
JButton searchButton = new JButton(SEARCH_BUTTON_DISPLAY);
JButton updateButton = new JButton(UPDATE_BUTTON_DISPLAY);
JButton removeButton = new JButton(REMOVE_BUTTON_DISPLAY);
addButton.addActionListener(this);
searchButton.addActionListener(this);
updateButton.addActionListener(this);
removeButton.addActionListener(this);
buttonPanel.add(addButton);
buttonPanel.add(searchButton);
buttonPanel.add(updateButton);
buttonPanel.add(removeButton);
display();
add(displayArea);
add(buttonPanel);
setLayout(layout);
}
@Override
public void actionPerformed(ActionEvent e) {
if (e.getActionCommand().equals(ADD_BUTTON_DISPLAY)) {
addContact();
}
else if (e.getActionCommand().equals(SEARCH_BUTTON_DISPLAY)) {
searchContact();
}
else if (e.getActionCommand().equals(UPDATE_BUTTON_DISPLAY)) {
updatePhoneBook();
}
else if (e.getActionCommand().equals(REMOVE_BUTTON_DISPLAY)) {
removeContact();
}
}
private void addContact() {
String name = JOptionPane.showInputDialog(ASK_FOR_NAME);
if (name != null !name.trim().equals("")) {
String phone = JOptionPane.showInputDialog(ASK_FOR_PHONE);
if (phoneBook.add(name, phone)) {
JOptionPane.showMessageDialog(null, ADD_SUCCESSFUL);
}
else {
JOptionPane.showMessageDialog(null, ADD_FAILED_DUPLICATE);
}
display();
}
}
private void searchContact() {
int option = -1;
while (option == -1) {
option = JOptionPane.showOptionDialog(null, SEARCH_PROMPT, "",
JOptionPane.DEFAULT_OPTION,
JOptionPane.INFORMATION_MESSAGE,
null, SEARCH_OPTIONS, SEARCH_OPTIONS[0]);
}
if (option == 0) {
String name = JOptionPane.showInputDialog(ASK_FOR_NAME);
Contact c = phoneBook.getByName(name);
if (c != null) {
JOptionPane.showMessageDialog(null, phoneBook.getByName(name));
}
else {
JOptionPane.showMessageDialog(null, SEARCH_NOT_FOUND);
}
}
else {
String phone = JOptionPane.showInputDialog(ASK_FOR_PHONE);
Contact c = phoneBook.getByPhone(phone);
if (c != null !c.getPhone().equals(ContactImpl.EMPTY_PHONE)) {
JOptionPane.showMessageDialog(null, c);
}
else {
JOptionPane.showMessageDialog(null, SEARCH_NOT_FOUND);
}
}
}
private void updatePhoneBook() {
phoneBook.update();
display();
}
private void removeContact() {
String name = JOptionPane.showInputDialog(ASK_FOR_NAME);
if (name != null !name.trim().equals("")) {
int option = JOptionPane.showConfirmDialog(null, REMOVE_CONFIRM
+ name + "?", "Confirm", JOptionPane.YES_NO_OPTION);
if (option == 0) {
if (!phoneBook.remove(name)) {
JOptionPane.showMessageDialog(null, SEARCH_NOT_FOUND);
}
else {
JOptionPane.showMessageDialog(null, REMOVE_SUCCESSFUL);
}
}
}
display();
}
private void display() {
displayArea.selectAll();
displayArea.replaceSelection("");
for (Contact c : phoneBook.getPhoneBook()) {
displayArea.append(c.toString() + "\n");
}
}
private static void createAndShowGUI() {
JFrame mainFrame = new PhoneBookDemo();
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.pack();
mainFrame.setVisible(true);
}
public static void main(String[] args) {
createAndShowGUI();
}
}
interface PhoneBookDemoConstants {
static final String ADD_BUTTON_DISPLAY = "Add";
static final String SEARCH_BUTTON_DISPLAY = "Search";
static final String UPDATE_BUTTON_DISPLAY = "Sort";
static final String REMOVE_BUTTON_DISPLAY = "Remove";
static final String ASK_FOR_NAME = "Please enter name of contact :";
static final String ASK_FOR_PHONE = "Please enter phone of contact :";
static final String ADD_SUCCESSFUL = "Contact has been added successfully.";
static final String ADD_FAILED_DUPLICATE = "Contact with same name has been dectected.";
static final String SEARCH_OPTIONS[] = {"By name", "By phone"};
static final String SEARCH_PROMPT = "Please Select a search method.";
static final String SEARCH_NOT_FOUND = "Contact is not found in your phone book.";
static final String REMOVE_CONFIRM = "Are you sure that you want to remove details of ";
static final String REMOVE_SUCCESSFUL = "Contact has been successfully removed.";
}
interface Contact {
public String getName();
public void setName(String name);
public String getPhone();
public void setPhone(String phone);
public String toString();
}
interface PhoneBook {
public ArrayListContact getPhoneBook();
public boolean add(String name);
public boolean add(String name, String phone);
public Contact getByName(String name);
public Contact getByPhone(String phone);
public void update();
public boolean remove(String name);
boolean isExist(String name);
}
class ContactImpl implements Contact {
static final String EMPTY_PHONE = "Empty";
private String name;
private String phone;
public ContactImpl (String name) {
this.name = name;
this.phone = null;
}
public ContactImpl (String name, String phone) {
this.name = name;
this.phone = phone;
}
@Override
public String getName() {
return name;
}
@Override
public void setName(String name) {
this.name = name;
}
@Override
public String getPhone() {
return (phone == null ? EMPTY_PHONE : phone);
}
@Override
public void setPhone(String phone) {
this.phone = phone;
}
@Override
public String toString() {
return getName() + "\t\t: " + getPhone();
}
}
class PhoneBookImpl implements PhoneBook {
ArrayListContact phoneBook;
public PhoneBookImpl () {
phoneBook = new ArrayListContact();
}
@Override
public ArrayListContact getPhoneBook() {
return phoneBook;
}
@Override
public boolean add(String name) {
if (isExist(name)) {
return false;
}
else {
phoneBook.add(new ContactImpl(name));
return true;
}
}
@Override
public boolean add(String name, String phone) {
if (isExist(name)) {
return false;
}
else {
if (phone == null || phone.equals("") || phone.trim().equals("")) {
add(name);
}
else {
phoneBook.add(new ContactImpl(name, phone));
}
return true;
}
}
@Override
public Contact getByName(String name) {
for (Contact c : phoneBook) {
if (c.getName().equals(name)) {
return c;
}
}
return null;
}
@Override
public Contact getByPhone(String phone) {
for (Contact c : phoneBook) {
if (c.getPhone().equals(phone)) {
return c;
}
}
return null;
}
@Override
public boolean remove(String name) {
for (Contact c : phoneBook) {
if (c.getName().equals(name)) {
phoneBook.remove(c);
return true;
}
}
return false;
}
@Override
public void update() {
for (int i = 0; i phoneBook.size() - 1; i++) {
for (int j = i + 1; j phoneBook.size(); j++) {
if (phoneBook.get(i).getName().toLowerCase().compareTo(
phoneBook.get(j).getName().toLowerCase()) 0) {
Contact c = phoneBook.get(i);
phoneBook.set(i, phoneBook.get(j));
phoneBook.set(j, c);
}
}
}
}
@Override
public boolean isExist(String name) {
for (Contact c : phoneBook) {
if (c.getName().equals(name)) {
return true;
}
}
return false;
}
}
1 设计功能 如 增加联系人，删除练习人，修改联系人
2 设计界面 用swing画个简单界面。
3 编写功能代码，实现功能。
4 做数据持久化，看是把信息存在数据库，还是存在文件里。
既然是小程序嘛~~~~简简单单啦，O(∩_∩)O哈哈~
package testPackage;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
public class Main {
/**
* @param args
*/
public static void main(String[] args)
{
MapString, String telBook = new HashMapString, String();
String name = "";
String tel = "";
String input = "";
for(;;)
{
try {
System.out.println("选择命令:1、输入电话记录；2、查询电话薄记录；3、退出");
input = (new BufferedReader(new InputStreamReader(System.in))).readLine();
} catch (IOException e) {
e.printStackTrace();
}
try {
switch(Integer.parseInt(input))
{
case 1:
try {
System.out.print("姓名:");
input = (new BufferedReader(new InputStreamReader(System.in))).readLine();
name = input;
System.out.print("电话:");
input = (new BufferedReader(new InputStreamReader(System.in))).readLine();
tel = input;
} catch (IOException e) {
e.printStackTrace();
};
try {
telBook.put(name, tel);
} catch (RuntimeException e) {
e.printStackTrace();
};
break;
case 2:
try {
System.out.print("姓名:");
input = (new BufferedReader(new InputStreamReader(System.in))).readLine();
System.out.println(input + "的电话号码是：" + (String)(telBook.get(input)));
} catch (IOException e) {
e.printStackTrace();
};
break;
case 3:
System.out.print("谢谢使用！");
System.exit(0);
break;
default: break;
}
} catch (Exception e) {
System.out.println("请输入正确的选择项！");
}
}
}
}
无聊之作……
