一道java編程題，請各位大神前來解答

代碼如下：

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abstract?class?Animal?{

private?String?name;

public?Animal(String?name)?{

this.name?=?name;

}

public?String?getName()?{

return?name;

}

public?void?setName(String?name)?{

this.name?=?name;

}

public?abstract?void?enjoy();

}

class?Cat?extends?Animal?{

private?String?eyesColor;

public?Cat(String?name)?{

super(name);

}

public?String?getEyesColor()?{

return?eyesColor;

}

public?void?setEyesColor(String?eyesColor)?{

this.eyesColor?=?eyesColor;

}

@Override

public?void?enjoy()?{

System.out.println("小貓"?+?getName()?+?"高興的喵喵叫。");

}

}

class?Dog?extends?Animal?{

private?String?furColor;

public?Dog(String?name)?{

super(name);

}

public?String?getFurColor()?{

return?furColor;

}

public?void?setFurColor(String?furColor)?{

this.furColor?=?furColor;

}

@Override

public?void?enjoy()?{

System.out.println("狗狗"?+?getName()?+?"高興的搖起了尾巴。");

}

}

class?Lady?{

private?String?name;

private?Animal?pet;

public?Lady(String?name,?Animal?pet)?{

this.name?=?name;

this.pet?=?pet;

}

public?String?getName()?{

return?name;

}

public?void?setName(String?name)?{

this.name?=?name;

}

public?Animal?getPet()?{

return?pet;

}

public?void?setPet(Animal?pet)?{

this.pet?=?pet;

}

public?void?myPetEnjoy()?{

pet.enjoy();

}

}

public?class?App?{

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

Cat?cat?=?new?Cat("Jerry");

cat.setEyesColor("藍色");

Lady?lady1?=?new?Lady("張女士",?cat);

lady1.myPetEnjoy();

Dog?dog?=?new?Dog("旺財");

dog.setFurColor("黃色");

Lady?lady2?=?new?Lady("王女士",?dog);

lady2.myPetEnjoy();

}

}

Java優化寵物系統 求代碼 求注解

四個類：Pet Dog Penguin PetTest（測試類）

1、Pet類:

/**

*?寵物類

*?Created?by?LuHuan?on?2017/7/27.

*/

public?class?Pet?{

String?name?=?"null";

int?health?=?100;//健康值

int?love?=?0;//親密度

//打印輸出寵物信息

public?void?print()?{

System.out.print("我的名字叫"?+??name?+?"，我的健康值是："?+?health?+?"，我和主人的親密程度是"?+?love?+?".");

}

public?String?getName()?{

return?name;

}

public?int?getHealth()?{

return?health;

}

public?int?getLove()?{

return?love;

}

}

2、Dog類：

/**

*?狗狗類

*?Created?by?LuHuan?on?2017/7/27.

*/

public?class?Dog?extends?Pet?{

String?strain?=?"拉布拉多犬";//品種

public?String?getStrain()?{

return?strain;

}

//重寫寵物的自白方法

@Override

public?void?print()?{

super.print();

System.out.println("我是一只"?+?strain);

}

}

3、Penguin類：

/**

*企鵝類

*?Created?by?LuHuan?on?2017/7/27.

*/

public?class?Penguin?extends?Pet?{

String?sex?=?"Q仔";//性別

public?String?getSex()?{

return?sex;

}

//重寫寵物的自白方法

@Override

public?void?print()?{

super.print();

System.out.println("我的性別是"?+?sex);

}

}

4、PetTest測試類：

/**

*?測試類

*?Created?by?LuHuan?on?2017/7/27.

*/

public?class?PetTest?{

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

Dog?dog?=?new?Dog();

dog.name?=?"歐歐";

Penguin?pgn?=?new?Penguin();

pgn.name?=?"楠楠";

System.out.println("寵物的自白：");

dog.print();

System.out.println("寵物的自白：");

pgn.print();

}

}

5、輸出：

寵物的自白：

我的名字叫歐歐，我的健康值是：100，我和主人的親密程度是0.我是一只拉布拉多犬

寵物的自白：

我的名字叫楠楠，我的健康值是：100，我和主人的親密程度是0.我的性別是Q仔

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

/*

animal是個抽象方法，Cat?和Dog?extends?這個就是用的多態

*/

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!");

}

}