기본햄버거 생성
package composite;
import lombok.Data;
@Data // getter, setter 생성
public class Burger {
private int price;
private String desc;
public Burger() {
this(1500, "기본버거");
}
public Burger(int price, String desc) {
this.price = price;
this.desc = desc;
System.out.println(desc + "가 만들어졌습니다.");
}
public static void main(String[] args) {
System.out.println(new Burger().getPrice());
}
}
코카콜라 만들기
package composite;
import lombok.Data;
@Data
public class Coke {
private int price;
private String desc;
public Coke() {
this(1500, "코카콜라");
}
public Coke(int price, String desc) {
this.price = price;
this.desc = desc;
System.out.println(desc + "가 만들어졌습니다.");
}
public static void main(String[] args) {
System.out.println(new Coke().getPrice());
}
}
감자칩 만들기
package composite;
import lombok.Data;
@Data
public class FrenchFried {
private int price;
private String desc;
public FrenchFried() {
this(2000, "감자칩");
}
public FrenchFried(int price, String desc) {
this.price = price;
this.desc = desc;
System.out.println(desc + "이 만들어졌습니다.");
}
public static void main(String[] args) {
System.out.println(new FrenchFried().getPrice());
}
}
Burger를 상속받아서 BigBurger 만들기
package composite;
import lombok.Data;
@Data
public class BigBurger extends Burger {
public BigBurger() {
super(4000, "빅버거");
}
public BigBurger(int price, String desc) {
super(price, desc);
}
public static void main(String[] args) {
System.out.println(new BigBurger().getPrice());
}
}
Burger를 상속받아서 ShrimpBurger 만들기
package composite;
import lombok.Data;
@Data
public class ShrimpBurger extends Burger {
public ShrimpBurger() {
super(3500, "쉬림프버거");
}
public ShrimpBurger(int price, String desc) {
super(price, desc);
}
public static void main(String[] args) {
System.out.println(new ShrimpBurger().getPrice());
}
}
콤포지션을 이용하여 클래스 안에 클래스를 사용하기
BigBurgerSet만들기
package composite;
import lombok.Data;
// 자바는 다중 상속이 안됨 (부모가 여럿이 될 수 없음)
@Data
public class BigBurgerSet {
// 콤포지션(중요) - 상속이 아닌 만들어 놓은 클래스를 가져오는 것
private BigBurger bigBurger;
private Coke coke;
private FrenchFried frenchFried;
public BigBurgerSet() {
this(new BigBurger(), new Coke(), new FrenchFried());
}
public BigBurgerSet(BigBurger bigBurger) {
this.bigBurger = bigBurger;
this.coke = new Coke();
this.frenchFried = new FrenchFried();
}
public BigBurgerSet(BigBurger bigBurger, Coke coke, FrenchFried frenchFried) {
this.bigBurger = bigBurger;
this.coke = coke;
this.frenchFried = frenchFried;
}
public static void main(String[] args) {
System.out.println(new BigBurgerSet().getBigBurger());
}
}
ShrimpBurgerSet 만들기
package composite;
import lombok.Data;
@Data
public class ShrimpBurgerSet {
// 콤포지션(중요) - 상속이 아닌 만들어 놓은 클래스를 가져오는 것
private ShrimpBurger shrimpBurger;
private Coke coke;
private FrenchFried frenchFried;
public ShrimpBurgerSet() {
this(new ShrimpBurger(), new Coke(), new FrenchFried());
}
public ShrimpBurgerSet(ShrimpBurger shrimpBurger) {
this(shrimpBurger, new Coke(), new FrenchFried());
}
public ShrimpBurgerSet(Coke coke) {
this(new ShrimpBurger(), coke, new FrenchFried());
}
public ShrimpBurgerSet(FrenchFried frenchFried) {
this(new ShrimpBurger(), new Coke(), frenchFried);
}
public ShrimpBurgerSet(ShrimpBurger shrimpBurger, Coke coke) {
this(shrimpBurger, coke, new FrenchFried());
}
public ShrimpBurgerSet(ShrimpBurger shrimpBurger, FrenchFried frenchFried) {
this(shrimpBurger, new Coke(), frenchFried);
}
public ShrimpBurgerSet(Coke coke, FrenchFried frenchFried) {
this(new ShrimpBurger(), coke, frenchFried);
}
// 생성자가 제일 많은 것이 기준
public ShrimpBurgerSet(ShrimpBurger shrimpBurger, Coke coke, FrenchFried frenchFried) {
this.shrimpBurger = shrimpBurger;
this.coke = coke;
this.frenchFried = frenchFried;
}
public static void main(String[] args) {
System.out.println(new ShrimpBurgerSet().getShrimpBurger());
}
}
LotteriaApp 만들기 (햄버거 운영)
package composite;
public class LotteriaApp {
public static void main(String[] args) {
// 빅버거 세트
BigBurgerSet set1 = new BigBurgerSet();
System.out.println();
// 기본버거
Burger burger1 = new Burger();
System.out.println();
// 콜라
Coke coke1 = new Coke();
System.out.println();
// BigBurgerSet
BigBurgerSet set2 = new BigBurgerSet(
new BigBurger(3000, "빅버거할인"),
new Coke(),
new FrenchFried()
);
System.out.println();
BigBurgerSet set3 = new BigBurgerSet(
new BigBurger(2000, "빅버거할인"),
new Coke(),
new FrenchFried()
);
System.out.println();
// 새우버거 세트 추가요
ShrimpBurgerSet set4 = new ShrimpBurgerSet();
System.out.println();
BigBurgerSet set5 = new BigBurgerSet(
new BigBurger(2000, "빅버거할인")
);
System.out.println();
}
}
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