package top.qaqaq.java.P281;

import java.sql.Connection;

//多态性的使用举例一：
public class AnimalTest {

	public static void main(String[] args) {
		
		AnimalTest test = new AnimalTest();
		test.func(new Dog());
		
		test.func(new Cat());
	}
	
	public void func(Animal animal) {//Animal animal = new Dog();
		animal.eat();
		animal.shout();
		if(animal instanceof Dog) {
			Dog d = (Dog)animal;
			d.watchDoor();
		}
	}
	
//	public void func(Dog dog) {
//		dog.eat();
//		dog.shout();
//	}
//	
//	public void func(Cat cat) {
//		cat.eat();
//		cat.shout();
//	}
}

class Animal{
	
	public void eat() {
		System.out.println("动物：进食");
	}
	
	public void shout() {
		System.out.println("动物：叫");
	}
}

class Dog extends Animal{
	
	public void eat() {
		System.out.println("狗吃骨头");
	}
	
	public void shout() {
		System.out.println("汪！汪！汪！");
	}
	
	public void watchDoor() {
		System.out.println("看门");
	}
}

class Cat extends Animal{
	
	public void eat() {
		System.out.println("猫吃鱼");
	}
	
	public void shout() {
		System.out.println("喵！喵！喵！");
	}
}

//举例二：

class Order{
	
	public void method(Object obj) {
		
	}
}

//举例三：

class Driver{
	
	public void doData(Connection conn) {//conn = new MySQLConnection(); / conn = new OracleConnection();
		//规范的步骤去操作数据
//		conn.method1();
//		conn.method2();
//		conn.method3();
		
	}
}