/定义接口 【】 IPet{ void beFriendly(); void beAccompanied(); } //定义抽象类 【】 class Animal{ private String name; //定义抽象方法 public 【】 void move(); public Animal(String name) { super(); this.name = name; } public String getName() { return name; } public void setName(String name) { this.name = name; } } //继承animal 实现IPet class Cat 【】{ public Cat(String name){ 【】 } //实现beFriendly方法 //实现be beAccompanied方法 @Override public void move() { // TODO Auto-generated method stub System.out.println("cat move quiently"); } } //继承animal 实现IPet class Dog 【】{ public Dog(String name){ 【】 } //实现beFriendly方法 //实现be beAccompanied法 @Override public void move() { // TODO Auto-generated method stub System.out.println("dog move quickly"); } }

答案如下：

定义接口：

interface IPet {
    void beFriendly();
    void beAccompanied();
}

定义抽象类：

abstract class Animal {
    private String name;

    public Animal(String name) {
        super();
        this.name = name;
    }

    public String getName() {
        return name;
    }

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

    public abstract void move();
}

继承Animal类实现IPet接口的Cat类：

class Cat extends Animal implements IPet {
    public Cat(String name) {
        super(name);
    }

    @Override
    public void beFriendly() {
        System.out.println("Cat is friendly");
    }

    @Override
    public void beAccompanied() {
        System.out.println("Cat likes to be accompanied");
    }

    @Override
    public void move() {
        System.out.println("Cat moves quietly");
    }
}

继承Animal类实现IPet接口的Dog类：

class Dog extends Animal implements IPet {
    public Dog(String name) {
        super(name);
    }

    @Override
    public void beFriendly() {
        System.out.println("Dog is friendly");
    }

    @Override
    public void beAccompanied() {
        System.out.println("Dog likes to be accompanied");
    }

    @Override
    public void move() {
        System.out.println("Dog moves quickly");
    }
}