public abstract class AbstractPet //定義寵物模板
{
 private String name;  //名稱
 private String color;  //顏色
 private int age;   //年齡

 public AbstractPet(){}
 public AbstractPet(String name, String color, int age){
  this.setName(name);
  this.setColor(color);
  this.setAge(age);
 }

 public String getName(){
  return this.name;
 }
 public String getColor(){
  return this.color;
 }
 public int getAge(){
  return this.age;
 }
 public void setName(String name){
  this.name = name;
 }
 public void setColor(String color){
  this.color = color;
 }
 public void setAge(int age){
  if (age > 0)
  {
   this.age = age;
  }else{
   this.age = 1;
  }
 } 

 //定義抽象方法
 public abstract void printInfo();   //自我介紹
}

public class Dog extends AbstractPet
{
 public Dog(String name, String color, int age){
  super(name, color, age);
 }
 //實現抽象方法
 public void printInfo(){ //自我介紹
  System.out.println("狗： " + super.getName() + ",年齡 " + super.getAge() + "歲，顏色：" + super.getColor());
 }
}

public class Cat extends AbstractPet
{
 public Cat(String name, String color, int age){
  super(name, color, age);
 }
 //實現抽象方法
 public void printInfo(){ //自我介紹
  System.out.println("狗： " + super.getName() + ",年齡 " + super.getAge() + "歲，顏色：" + super.getColor());
 }
}

public class PetShop
{
 private AbstractPet[] pets;
 private int foot; //定義下標

 public PetShop(int len){ //寵物數量由用戶確定
  if (len > 0)
  {
   this.pets = new AbstractPet[len];
  }else{
   this.pets = new AbstractPet[1];
  }
 }

 //添加寵物的方法
 public boolean add(AbstractPet pet){
  if (this.foot < this.pets.length)
  {
   this.pets[foot] = pet;
   this.foot ++;
   return true;
  }else{
   return false;
  }
 }

 //定義查詢寵物的方法[提供按照種類查詢和按照姓名查詢兩種方法]
 public AbstractPet[] search(String keyword){
  int n = 0; //定義查詢到的寵物數量
  AbstractPet[] searchPets = null;
  for (int i = 0; i < this.pets.length; i++)
  {
   if (this.pets[i] != null)
   {
    if (this.pets[i].getName().indexOf(keyword) != -1 || this.pets[i].getColor().indexOf(keyword) != -1)
    {
     n++;
    }
   }   
  }
  searchPets = new AbstractPet[n];
  n = 0;
  for (int i = 0; i < this.pets.length; i++)
  {
   if (this.pets[i] != null)
   {
    if (this.pets[i].getName().indexOf(keyword) != -1 || this.pets[i].getColor().indexOf(keyword) != -1)
    {
     searchPets[n] = this.pets[i];
     n ++;
    }
   }   
  }
  return searchPets;
 }
}

public class testPetShop
{
 public static void main(String[] args){
  PetShop p = new PetShop(5);
  p.add(new Dog("狗1", "黑色的", 3));
  p.add(new Dog("狗2", "紅色的", 2));
  p.add(new Cat("貓1", "褐色的", 3));
  p.add(new Cat("貓2", "黃色的", 3));
  p.add(new Cat("貓3", "黑色的", 5));
  p.add(new Dog("狗3", "棕色的", 4));
  print(p.search("黑"));
 }
 public static void print(AbstractPet pets[]){
  for (int i = 0; i < pets.length; i++)
  {
   if (pets[i] != null)
   {
    pets[i].printInfo();
   }   
  }
 }
}

interface IPet
{
 String getName(); //取得寵物姓名
 String getColor(); //取得寵物顏色
 int getAge();  //取得寵物年齡
 void show();   //顯示寵物信息
}

public class Dog implements IPet
{
 private String name;
 private String color;
 private int age;

 public Dog(String name, String color, int age){
  this.setName(name);
  this.setColor(color);
  this.setAge(age);
 }
 public String getName(){
  return this.name;
 }
 public String getColor(){
  return this.color;
 }
 public int getAge(){
  return this.age;
 }
 public void setName(String name){
  this.name = name;
 }
 public void setColor(String color){
  this.color = color;
 }
 public void setAge(int age){
  if (age < 0 || age > 50)
  {
   this.age = 1; //默認值
  }else{
   this.age = age;
  }
 }
 public void show(){
  System.out.println(this.toString());
 }
 public String toString(){
  return "狗：" + this.getName() + " " + this.getColor() + " " + this.getAge();
 }
}

public class Cat implements IPet
{
 private String name;
 private String color;
 private int age;

 public Cat(String name, String color, int age){
  this.setName(name);
  this.setColor(color);
  this.setAge(age);
 }
 public String getName(){
  return this.name;
 }
 public String getColor(){
  return this.color;
 }
 public int getAge(){
  return this.age;
 }
 public void setName(String name){
  this.name = name;
 }
 public void setColor(String color){
  this.color = color;
 }
 public void setAge(int age){
  if (age < 0 || age > 50)
  {
   this.age = 1; //默認值
  }else{
   this.age = age;
  }
 }
 public void show(){
  System.out.println(this.toString());
 }
 public String toString(){
  return "貓：" + this.getName() + " " + this.getColor() + " " + this.getAge();
 }
}

public class PetShop
{
 private IPet[] pets;
 private int foot;

 public PetShop(int len){ //寵物店的寵物數量由用戶決定
  if (len > 0)
  {
   pets = new IPet[len];
  }else{
   pets = new IPet[1]; //默認最小數量為1
  }
 }
 public boolean add(IPet pet){
  if (this.foot < this.pets.length)
  {
   this.pets[this.foot] = pet;
   this.foot ++;
   return true;
  }else{
   return false;
  }
 }
 public IPet[] search(String keyword){
  //定義一個新的寵物對象數組，用來存儲符合查詢條件的寵物
  IPet[] resultPet = null; //不確定數量，要通過循環得到
  int count = 0; //用來存儲符合查詢條件的寵物數量
  for (int i = 0; i < this.pets.length; i++)
  {
   if (this.pets[i] != null)
   {
    if (this.pets[i].getName().indexOf(keyword) != -1 || this.pets[i].getColor().indexOf(keyword) != -1)
    {
     count ++;
    }
   }
  }
  resultPet = new IPet[count];
  int n = 0;
  for (int i = 0; i < this.pets.length; i++)
  {
   if (this.pets[i] != null)
   {
    if (this.pets[i].getName().indexOf(keyword) != -1 || this.pets[i].getColor().indexOf(keyword) != -1)
    {
     resultPet[n] = this.pets[i];
     n ++;
    }
   }
  }
  return resultPet;
 }
}

public class TestPetShop
{
 public static void main(String[] args){
  //創建一個寵物商店
  PetShop ps = new PetShop(7); //假設可以放置5只寵物
  ps.add(new Dog("旺旺", "黑色的",4));
  ps.add(new Dog("旺財", "白色的",6));
  ps.add(new Dog("小黑", "黃色的",3));
  ps.add(new Cat("波波", "褐色的",7));
  ps.add(new Cat("咪咪", "黑色的",8));
  ps.add(new Cat("小云", "灰色的",2));
  ps.add(new Dog("仔仔", "黃色的",5));
  print(ps.search("色"));
 }
 public static void print(IPet[] pet){
  for (int i = 0; i < pet.length; i++)
  {
   if (pet[i] != null)
   {
    pet[i].show();
   }
  }
 }
}