java程序 一個(gè)主人有兩只寵物,一條狗一只貓,狗叫旺財(cái)，貓叫小花，分別給寵物喂食

public?class?Person?{

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

Animal?a1?=?new?Animal("貓","小花","魚");

Animal?a2?=?new?Animal("狗","旺財(cái)"，"骨頭");

a1.eat();a2.ert();

}

}

class?Animal?{

String?species;

String?animalName;

String?foodName;

Animal(String?species,String?animalName,String?foodName)?{

this.species?=?species;

this.animalNam?e=?animalName;

this.foodName?=?foodName;

}

public?void?eat()?{

System.out.print("我的"+species+","+animalName?+"?吃了?："+foodName);

}

}

//我也才學(xué)java不到一個(gè)月，我就能理解這么多

//還可以寫繼承的。亦可以寫成多線程的。

//繼承就是把Animal類當(dāng)父類，再寫兩個(gè)類繼承它。這里又可以復(fù)習(xí)多態(tài)，哈哈。

//多線程就是同事喂這倆動(dòng)物。

JAVA代碼主人喂寵物吃東西狗只吃骨頭貓只吃魚求代碼用多態(tài)

/*

animal是個(gè)抽象方法，Cat?和Dog?extends?這個(gè)就是用的多態(tài)

*/

package?Test;

public?class?Test{

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

Feeder?feeder?=?new?Feeder();

feeder.feedAnimals();

}

}

abstract?class?Animal{

public?abstract?void?eat(String?s);

}

class?Dog?extends?Animal{

private?final?String?FOOD?=?"bone";

@Override

public?void?eat(String?s){

if?(s?==?FOOD)

System.out.println("Dog?is?eating?bones");

else

System.out.println("Not?"+this.FOOD+",?Dog?don't?want?to?eat");

}

}

class?Cat?extends?Animal{

private?final?String?FOOD?=?"fish";

@Override

public?void?eat(String?s){

if?(s?==?FOOD)

System.out.println("Cat?is?eating?fishes");

else

System.out.println("Not?"+this.FOOD+",?Cat?don't?want?to?eat");

}

}

class?Feeder{

private?final?String[]?FOODS?=?{"fish",?"bone",?"shit"};

private?Animal?cat;

private?Animal?dog;

Feeder(){

dog?=?new?Dog();

cat?=?new?Cat();

}

public?void?feedAnimals(){

System.out.println("Feeding?animals...");

String?food;

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

food?=?FOODS[i];

if(food?==?"fish")

this.cat.eat(food);

else?if(food?==?"bone")

this.dog.eat(food);

else{

System.out.println("Not?Fishes?or?Bones,?is?"+?food);

}

}

System.out.println("Done!");

}

}

JAVA代碼主人喂寵物吃東西狗只吃骨頭貓只吃魚求代碼

class 動(dòng)物{

public boolean 吃(食物 sw){

}

}

class 狗 extends 動(dòng)物{

public boolean 吃(食物 sw){

if(sw.種類 == 骨頭) return true;

else return false;

}

}

class 貓 extends 動(dòng)物{

public boolean 吃(食物 sw){

if(sw.種類 == 魚) return true;

else return false;

}

}

你還需要建立一個(gè) 食物 類。

用Java程序完成以下場(chǎng)景(用繼承多態(tài))：有一個(gè)主人（Master類），他養(yǎng)了兩只寵物（Pet類）

public?class?Run?{

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

Master?master?=?new?Master();

master.feedDog("雞骨頭");

master.feedCat("雞骨頭");

}

}

class?Master?{

private?Pet?mPet;

private?Food?mFood;

public?void?feedCat(String?food)?{

mPet?=?new?Cat();

mFood?=?new?Food(food);

mPet.eat(mFood);

}

public?void?feedDog(String?food)?{

mPet?=?new?Dog();

mFood?=?new?Food(food);

mPet.eat(mFood);

}

}

class?Dog?extends?Pet{

@Override

public?void?eat(Food?food)?{

System.out.println("正在喂小狗吃"+food.getFood());

if?(food.getFood().matches(Food.BONE))?{

System.out.println("小狗正在吃"+food.getFood()+"！");

}else?{

System.out.println("但是小狗不喜歡吃"+food.getFood()+"!");

}

}

}

class?Cat?extends?Pet{

@Override

public?void?eat(Food?food)?{

System.out.println("正在喂小貓吃"+food.getFood());

if?(food.getFood().matches(Food.FISH))?{

System.out.println("小貓正在吃"+food.getFood()+"！");

}else?{

System.out.println("但是小貓不喜歡吃"+food.getFood()+"!");

}

}

}

class?Food?{

public?final?static?String?BONE?=?".*骨.*";

public?final?static?String?FISH?=?".*魚.*";

private?String?food;

public?String?getFood()?{

return?food;

}

public?void?setFood(String?food)?{

this.food?=?food;

}

public?Food(String?food)?{

this.food?=?food;

}

}

class?Pet?{

public?void?eat(Food?food)?{

}

}