abstract class and duotai
package
demo.duotai;
public
abstract class Pet {
private int health;
public Pet(int health) {
this.health = health;
}
public int getHealth() {
if (health > 0) {
return health;
} else {
System.out.println("that is an unvalid number");
return 0;
}
}
public void setHealth(int health) {
this.health = health;
}
public abstract void toHospital();
}
------------------------------------
package
demo.duotai.impl;
import
demo.duotai.Pet;
public
class Dog extends Pet {
public Dog(int health) {
super(health);
// TODO Auto-generated constructor stub
}
public void toHospital(){
this.setHealth(50);
System.out.println(getHealth() + " " + "inject, medical");
}
public void dogFun(){
System.out.println("dog fun");
}
}
-----------------------------
package
demo.duotai.impl;
import
demo.duotai.Pet;
public
class Penguin extends Pet {
public Penguin(int health) {
super(health);
}
public void toHospital(){
//this.setHealth(50);
System.out.println(this.getHealth() + " " + "medical, rest");
}
public
void penguinFun(){
System.out.println("Penguin fun");
}
}
------------------
package
demo.duotai.impl;
import
demo.duotai.Pet;
public
class Cat extends Pet {
public Cat(int health) {
super(health);
// TODO Auto-generated constructor stub
}
public void toHospital() {
this.setHealth(30);
System.out.println(getHealth() + " " + "cat cure method");
}
}
------------------------
package
demo.duotai;
import
demo.duotai.impl.Cat;
import
demo.duotai.impl.Dog;
import
demo.duotai.impl.Penguin;
public
class Master {
public void Cure(Pet pet) {
pet.toHospital();
}
public static void main(String[] args) {
// Pet pet = new Penguin();
// Pet pet1 = new Dog();
// Pet pet3 = new Cat();
// Master master = new Master();
//
// master.Cure(pet);
// master.Cure(pet1);
// master.Cure(pet3);
Pet pet = new Penguin(100);
Master master = new Master();
master.Cure(pet);
pet = new Dog(70);
master.Cure(pet);
if (pet instanceof Dog) {
((Dog) pet).dogFun();
} else if (pet instanceof Penguin) {
Penguin penguin = (Penguin) pet;
penguin.penguinFun();
}
// pet = new Cat();
// master.Cure(pet);
}
}
