(四)接口

1.接口继承

接口继承需要用 implements
类继承用extend

2.接口示例

interface(父类)

package interfaceTest;
public interface  Animal {
    int ID = 1;// 定义全局变量
    void breathe();
    void run();
}

implements(子类继承)

package interfaceTest;
class Dog implements Animal {
    public void breathe() {
        System.out.println("狗在呼吸");
    }
    public void run(){
        System.out.println("狗在跑");
    }
    public void doa(){
        System.out.println("我是子");
    }
}

print

package interfaceTest;
public class PrintDog {
    public static void main(String[] args) {
          // TODO Auto-generated method stub
          Dog dog=new Dog(); 
          dog.breathe();
          dog.run();
          dog.doa();
       System.out.println(dog.ID);
   }
}