TSL_2021.12.14

JAVAクリア

作成者とは?

[合成例]

class Phone {
    String model;
    String color;
    int price;
	
    // 생성자
    Phone(String model, String color, int price) {
        this.model = model;
        this.color = color;
        this.price = price;
    }
}

public class Main {
    public static void main(String[] args) {
        Phone galaxy = new Phone("Galaxy10", "Black", 100);

        Phone iphone =new Phone("iPhoneX", "Black", 200);

        System.out.println("철수는 이번에 " + galaxy.model + galaxy.color + " + 색상을 " + galaxy.price + "만원에 샀다.");
        System.out.println("영희는 이번에 " + iphone.model + iphone.color + " + 색상을 " + iphone.price + "만원에 샀다.");
    }
}

[動作の説明]

もし。ジェネレータを作成してくれなかったら?

継承とは?

[合成例]

class Animal {
    String name;

    public void cry() {
        System.out.println(name + " is crying.");
    }
}

class Dog extends Animal {

    Dog(String name) {
        this.name = name;
    }

    public void swim() {
        System.out.println(name + " is swimming!");
    }
}

public class Main {
    public static void main(String[] args) {
        Dog dog = new Dog("코코");
        dog.cry();
        dog.swim();
        
        Animal dog2 = dog;
        dog2.cry();
//        dog2.swim(); // compile error
    }
}

[動作の説明]