Java 基础(抽象类的匿名子类)

AbstractTest.java

package com.klvchen.java;

public class AbstractTest {
	public static void main(String[] args) {
		
		//一旦 Person 类抽象了，就不可以实例化
//		Person p1 = new Person();
//		p1.eat();
		Person s1 = new Student("klvchen", 25);
		s1.eat();
		s1.walk();
	}

}

abstract class Creature{
	public abstract void breath();
	
}


abstract class Person extends Creature{
	String name;
	int age;
	
	public Person() {
		
	}
	
	public Person(String name, int age) {
		this.name = name;
		this.age = age;
	}
	
	//不是抽象方法：
//	public void eat() {
//		System.out.println("人吃饭");
//	}
	
	//抽象方法
	public abstract void eat();
	
	public void walk() {
		System.out.println("人走路");
	}
}


class Student extends Person{
	
	public Student(String name, int age) {
		super(name, age);
	}
	
	public Student() {
		
	}
	
	public void eat() {
		System.out.println("学生多吃有营养的食物");
	}

	@Override
	public void breath() {
		System.out.println("学生应该呼吸新鲜的没有雾霾的空气");
	}
	
}

PersonTest.java

package com.klvchen.java;

public class PersonTest {
	
	public static void main(String[] args) {
		
		method(new Student()); //匿名对象
		
		Worker worker = new Worker();
		method1(worker); //非匿名的类非匿名的对象
		
		method1(new Worker()); //非匿名的类匿名的对象
		
		System.out.println("**********************");
		
		// 创建了一个匿名子类的对象：p
		Person p = new Person() {

			@Override
			public void eat() {
				System.out.println("吃东西");
			}

			@Override
			public void breath() {
				System.out.println("好好呼吸");
			}
			
		};
		
		method1(p);
		
		System.out.println("****************************");
		//创建匿名子类的匿名对象
		method1(new Person() {

			@Override
			public void eat() {
				System.out.println("吃好吃东西");
			}

			@Override
			public void breath() {
				System.out.println("好好呼吸新鲜空气");
			}
			
		});
		
	}
	
	public static void method1(Person p) {
		p.eat();
		p.breath();
	}
	
	public static void method(Student s) {
		
	}
}

class Worker extends Person{

	@Override
	public void eat() {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void breath() {
		// TODO Auto-generated method stub
		
	}
	
}