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package generics;

import java.util.ArrayList;

import java.util.List;

/**

<Product> 로 이뤄진 ArrayList//

class Product

class Tv extends Product{}

class Audio extends Product{}

* */

public class GenericDemo {

public static void main(String[] args) {

ArrayList<Product> productList = new ArrayList<Product>();

productList.add(new Product("Product 클래스"));

productList.add(new Audio("Audio 클래스"));

Product p = productList.get(0);

System.out.println(p.toString());

Audio o = (Audio) productList.get(1);

System.out.println(o.toString());

ArrayList<Product> list = new ArrayList<Product>();

ArrayList<TV> tvlist = new ArrayList<TV>();

// ArrayList<Product> tvList = new ArrayList<TV>();//컴파일 에러

List<TV> tvList11 = new ArrayList<TV>();

productList.add(new TV("tv"));

productList.add(new Audio("audio"));

tvlist.add(new TV("tv1"));

tvlist.add(new TV("tv2"));

printAll(productList);

// printAll(tvlist);// 컴파일 에러 발생

}

private static void printAll(ArrayList<Product> list){

for(Product p: list){

System.out.println(p);

}

}

}

class Product{

String name;

public Product(String name) {

this.name = name;

}

@Override

public String toString() {

return "Product{" +

"name='" + name + '\'' +

'}';

}

}

class TV extends Product{

public TV(String name) {

super(name);

}

}

class Audio extends Product{

public Audio(String name) {

super(name);

}

}