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# switch\~case

## switch\~case 구문 변화

JDK 12에서는 switch\~case 구문이 조금 더 직관적으로 변화하였다.

* lambda 적용
* 변수에 삽입 가능

### 기존 switch 구문

```java
switch(month){
case 3:
case 4:
case 5:
    System.out.println("봄");
    break;
case 6:
case 7:
case 8:
    System.out.println("여름");
    break;
case 9:
case 10:
case 11:
    System.out.println("가을");
    break;
case 12:
case 1:
case 2:
    System.out.println("겨울");
    break;
}
```

### 람다식이 적용된 switch 구문

```java
switch(month){
case 3, 4, 5 -> System.out.println("봄");
case 6, 7, 8 -> System.out.println("여름");
case 9, 10, 11 -> System.out.println("가을");
case 12, 1, 2 -> System.out.println("겨울");
}
```

### 변수에 반환값을 저장하도록 작성된 switch 구문

```java
String season = switch(month){
    case 3, 4, 5 -> "봄";
    case 6, 7, 8 -> "여름";
    case 9, 10, 11 -> "가을";
    case 12, 1, 2 -> "겨울";
}
```