接口和继承

/*
 *     类与类：
    继承关系，只能单继承，可以多层继承
    类与接口：
        实现关系，可以单实现，也可以多实现
    接口与接口：
        继承关系，可以单继承，也可以多继承
 * */
interface Father{
    public abstract void show();
}
interface Mother{
    public abstract void show2();
}
interface Sister extends Father, Mother{
    
}
class Son extends Object implements Father, Mother{
    public void show(){
        System.out.println("show son");
    }
    public void show2(){
        System.out.println("show son2");
    }
}
public class InterfaceDemo2 {
    public static void main(String[] args){
        
    }
}

interface Jumpping{
    public abstract void jump();
}
abstract class Animal{
    private String name;
    private int age;
    public Animal(){}
    public Animal(String name, int age){
        this.name = name;
        this.age = age;
    }
    public void setName(String name){
        this.name = name;
    }
    public String getName(){
        return name;
    }
    public void setAge(int age){
        this.age = age;
    }
    public int getAge(){
        return age;
    }
    public void sleep(){
        System.out.println("睡觉啰");
    }
    public abstract void eat();
}
class Cat extends Animal{
    public Cat(){}
    public Cat(String name, int age){
        super(name, age);
    }
    public void eat(){
        System.out.println("猫吃鱼");
    }
}
class JumpCat extends Cat implements Jumpping{
    public JumpCat(){}
    public JumpCat(String name, int age){
        super(name, age);
    }
    public void jump(){
        System.out.println("猫跳高");
    }
}
public class InterfaceDemo3 {
    public static void main(String[] args){
        JumpCat jp = new JumpCat();
        jp.setName("Tom");
        jp.setAge(3);
        System.out.println(jp.getName()+"------"+jp.getAge());
        jp.eat();
        jp.sleep();
        jp.jump();
    }
}