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https://github.com/parkjungyoon/java_lotto_review


https://github.com/parkjungyoon/java_lotto_review

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# ๋ฏธ์…˜ - ๋กœ๋˜

## ๐Ÿ” ์ง„ํ–‰ ๋ฐฉ์‹

- ๋ฏธ์…˜์€ **๊ธฐ๋Šฅ ์š”๊ตฌ ์‚ฌํ•ญ, ํ”„๋กœ๊ทธ๋ž˜๋ฐ ์š”๊ตฌ ์‚ฌํ•ญ, ๊ณผ์ œ ์ง„ํ–‰ ์š”๊ตฌ ์‚ฌํ•ญ** ์„ธ ๊ฐ€์ง€๋กœ ๊ตฌ์„ฑ๋˜์–ด ์žˆ๋‹ค.
- ์„ธ ๊ฐœ์˜ ์š”๊ตฌ ์‚ฌํ•ญ์„ ๋งŒ์กฑํ•˜๊ธฐ ์œ„ํ•ด ๋…ธ๋ ฅํ•œ๋‹ค. ํŠนํžˆ ๊ธฐ๋Šฅ์„ ๊ตฌํ˜„ํ•˜๊ธฐ ์ „์— ๊ธฐ๋Šฅ ๋ชฉ๋ก์„ ๋งŒ๋“ค๊ณ , ๊ธฐ๋Šฅ ๋‹จ์œ„๋กœ ์ปค๋ฐ‹ ํ•˜๋Š” ๋ฐฉ์‹์œผ๋กœ ์ง„ํ–‰ํ•œ๋‹ค.
- ๊ธฐ๋Šฅ ์š”๊ตฌ ์‚ฌํ•ญ์— ๊ธฐ์žฌ๋˜์ง€ ์•Š์€ ๋‚ด์šฉ์€ ์Šค์Šค๋กœ ํŒ๋‹จํ•˜์—ฌ ๊ตฌํ˜„ํ•œ๋‹ค.

## ๐Ÿ“ฎ ๋ฏธ์…˜ ์ œ์ถœ ๋ฐฉ๋ฒ•

- ๋ฏธ์…˜ ๊ตฌํ˜„์„ ์™„๋ฃŒํ•œ ํ›„ GitHub์„ ํ†ตํ•ด ์ œ์ถœํ•ด์•ผ ํ•œ๋‹ค.
- GitHub์„ ํ™œ์šฉํ•œ ์ œ์ถœ ๋ฐฉ๋ฒ•์€ [ํ”„๋ฆฌ์ฝ”์Šค ๊ณผ์ œ ์ œ์ถœ](https://github.com/woowacourse/woowacourse-docs/tree/master/precourse) ๋ฌธ์„œ๋ฅผ ์ฐธ๊ณ ํ•ด
์ œ์ถœํ•œ๋‹ค.
- GitHub์— ๋ฏธ์…˜์„ ์ œ์ถœํ•œ ํ›„ [์šฐ์•„ํ•œํ…Œํฌ์ฝ”์Šค ์ง€์›](https://apply.techcourse.co.kr) ์‚ฌ์ดํŠธ์— ์ ‘์†ํ•˜์—ฌ ํ”„๋ฆฌ์ฝ”์Šค ๊ณผ์ œ๋ฅผ ์ œ์ถœํ•œ๋‹ค.
- ์ž์„ธํ•œ ๋ฐฉ๋ฒ•์€ [์ œ์ถœ ๊ฐ€์ด๋“œ](https://github.com/woowacourse/woowacourse-docs/tree/master/precourse#์ œ์ถœ-๊ฐ€์ด๋“œ) ์ฐธ๊ณ 
- **Pull Request๋งŒ ๋ณด๋‚ด๊ณ  ์ง€์› ํ”Œ๋žซํผ์—์„œ ๊ณผ์ œ๋ฅผ ์ œ์ถœํ•˜์ง€ ์•Š์œผ๋ฉด ์ตœ์ข… ์ œ์ถœํ•˜์ง€ ์•Š์€ ๊ฒƒ์œผ๋กœ ์ฒ˜๋ฆฌ๋˜๋‹ˆ ์ฃผ์˜ํ•œ๋‹ค.**

## ๐Ÿšจ ๊ณผ์ œ ์ œ์ถœ ์ „ ์ฒดํฌ ๋ฆฌ์ŠคํŠธ - 0์  ๋ฐฉ์ง€

- ๊ธฐ๋Šฅ ๊ตฌํ˜„์„ ๋ชจ๋‘ ์ •์ƒ์ ์œผ๋กœ ํ–ˆ๋”๋ผ๋„ **์š”๊ตฌ ์‚ฌํ•ญ์— ๋ช…์‹œ๋œ ์ถœ๋ ฅ๊ฐ’ ํ˜•์‹์„ ์ง€ํ‚ค์ง€ ์•Š์„ ๊ฒฝ์šฐ 0์ ์œผ๋กœ ์ฒ˜๋ฆฌ**ํ•œ๋‹ค.
- ๊ธฐ๋Šฅ ๊ตฌํ˜„์„ ์™„๋ฃŒํ•œ ๋’ค ์•„๋ž˜ ๊ฐ€์ด๋“œ์— ๋”ฐ๋ผ ํ…Œ์ŠคํŠธ๋ฅผ ์‹คํ–‰ํ–ˆ์„ ๋•Œ ๋ชจ๋“  ํ…Œ์ŠคํŠธ๊ฐ€ ์„ฑ๊ณตํ•˜๋Š”์ง€ ํ™•์ธํ•œ๋‹ค.
- **ํ…Œ์ŠคํŠธ๊ฐ€ ์‹คํŒจํ•  ๊ฒฝ์šฐ 0์ ์œผ๋กœ ์ฒ˜๋ฆฌ**๋˜๋ฏ€๋กœ, ๋ฐ˜๋“œ์‹œ ํ™•์ธ ํ›„ ์ œ์ถœํ•œ๋‹ค.

### ํ…Œ์ŠคํŠธ ์‹คํ–‰ ๊ฐ€์ด๋“œ

- ํ„ฐ๋ฏธ๋„์—์„œ `java -version`์„ ์‹คํ–‰ํ•˜์—ฌ Java ๋ฒ„์ „์ด 11์ธ์ง€ ํ™•์ธํ•œ๋‹ค. ๋˜๋Š” Eclipse ๋˜๋Š” IntelliJ IDEA์™€ ๊ฐ™์€ IDE์—์„œ Java 11๋กœ ์‹คํ–‰๋˜๋Š”์ง€ ํ™•์ธํ•œ๋‹ค.
- ํ„ฐ๋ฏธ๋„์—์„œ Mac ๋˜๋Š” Linux ์‚ฌ์šฉ์ž์˜ ๊ฒฝ์šฐ `./gradlew clean test` ๋ช…๋ น์„ ์‹คํ–‰ํ•˜๊ณ ,
Windows ์‚ฌ์šฉ์ž์˜ ๊ฒฝ์šฐ `gradlew.bat clean test` ๋ช…๋ น์„ ์‹คํ–‰ํ•  ๋•Œ ๋ชจ๋“  ํ…Œ์ŠคํŠธ๊ฐ€ ์•„๋ž˜์™€ ๊ฐ™์ด ํ†ต๊ณผํ•˜๋Š”์ง€ ํ™•์ธํ•œ๋‹ค.

```
BUILD SUCCESSFUL in 0s
```

---

## ๐Ÿš€ ๊ธฐ๋Šฅ ์š”๊ตฌ ์‚ฌํ•ญ

๋กœ๋˜ ๊ฒŒ์ž„ ๊ธฐ๋Šฅ์„ ๊ตฌํ˜„ํ•ด์•ผ ํ•œ๋‹ค. ๋กœ๋˜ ๊ฒŒ์ž„์€ ์•„๋ž˜์™€ ๊ฐ™์€ ๊ทœ์น™์œผ๋กœ ์ง„ํ–‰๋œ๋‹ค.

```
- ๋กœ๋˜ ๋ฒˆํ˜ธ์˜ ์ˆซ์ž ๋ฒ”์œ„๋Š” 1~45๊นŒ์ง€์ด๋‹ค.
- 1๊ฐœ์˜ ๋กœ๋˜๋ฅผ ๋ฐœํ–‰ํ•  ๋•Œ ์ค‘๋ณต๋˜์ง€ ์•Š๋Š” 6๊ฐœ์˜ ์ˆซ์ž๋ฅผ ๋ฝ‘๋Š”๋‹ค.
- ๋‹น์ฒจ ๋ฒˆํ˜ธ ์ถ”์ฒจ ์‹œ ์ค‘๋ณต๋˜์ง€ ์•Š๋Š” ์ˆซ์ž 6๊ฐœ์™€ ๋ณด๋„ˆ์Šค ๋ฒˆํ˜ธ 1๊ฐœ๋ฅผ ๋ฝ‘๋Š”๋‹ค.
- ๋‹น์ฒจ์€ 1๋“ฑ๋ถ€ํ„ฐ 5๋“ฑ๊นŒ์ง€ ์žˆ๋‹ค. ๋‹น์ฒจ ๊ธฐ์ค€๊ณผ ๊ธˆ์•ก์€ ์•„๋ž˜์™€ ๊ฐ™๋‹ค.
- 1๋“ฑ: 6๊ฐœ ๋ฒˆํ˜ธ ์ผ์น˜ / 2,000,000,000์›
- 2๋“ฑ: 5๊ฐœ ๋ฒˆํ˜ธ + ๋ณด๋„ˆ์Šค ๋ฒˆํ˜ธ ์ผ์น˜ / 30,000,000์›
- 3๋“ฑ: 5๊ฐœ ๋ฒˆํ˜ธ ์ผ์น˜ / 1,500,000์›
- 4๋“ฑ: 4๊ฐœ ๋ฒˆํ˜ธ ์ผ์น˜ / 50,000์›
- 5๋“ฑ: 3๊ฐœ ๋ฒˆํ˜ธ ์ผ์น˜ / 5,000์›
```

- ๋กœ๋˜ ๊ตฌ์ž… ๊ธˆ์•ก์„ ์ž…๋ ฅํ•˜๋ฉด ๊ตฌ์ž… ๊ธˆ์•ก์— ํ•ด๋‹นํ•˜๋Š” ๋งŒํผ ๋กœ๋˜๋ฅผ ๋ฐœํ–‰ํ•ด์•ผ ํ•œ๋‹ค.
- ๋กœ๋˜ 1์žฅ์˜ ๊ฐ€๊ฒฉ์€ 1,000์›์ด๋‹ค.
- ๋‹น์ฒจ ๋ฒˆํ˜ธ์™€ ๋ณด๋„ˆ์Šค ๋ฒˆํ˜ธ๋ฅผ ์ž…๋ ฅ๋ฐ›๋Š”๋‹ค.
- ์‚ฌ์šฉ์ž๊ฐ€ ๊ตฌ๋งคํ•œ ๋กœ๋˜ ๋ฒˆํ˜ธ์™€ ๋‹น์ฒจ ๋ฒˆํ˜ธ๋ฅผ ๋น„๊ตํ•˜์—ฌ ๋‹น์ฒจ ๋‚ด์—ญ ๋ฐ ์ˆ˜์ต๋ฅ ์„ ์ถœ๋ ฅํ•˜๊ณ  ๋กœ๋˜ ๊ฒŒ์ž„์„ ์ข…๋ฃŒํ•œ๋‹ค.
- ์‚ฌ์šฉ์ž๊ฐ€ ์ž˜๋ชป๋œ ๊ฐ’์„ ์ž…๋ ฅํ•  ๊ฒฝ์šฐ `IllegalArgumentException`๋ฅผ ๋ฐœ์ƒ์‹œํ‚ค๊ณ , "[ERROR]"๋กœ ์‹œ์ž‘ํ•˜๋Š” ์—๋Ÿฌ ๋ฉ”์‹œ์ง€๋ฅผ ์ถœ๋ ฅ ํ›„ ์ข…๋ฃŒํ•œ๋‹ค.

### ์ž…์ถœ๋ ฅ ์š”๊ตฌ ์‚ฌํ•ญ

#### ์ž…๋ ฅ

- ๋กœ๋˜ ๊ตฌ์ž… ๊ธˆ์•ก์„ ์ž…๋ ฅ ๋ฐ›๋Š”๋‹ค. ๊ตฌ์ž… ๊ธˆ์•ก์€ 1,000์› ๋‹จ์œ„๋กœ ์ž…๋ ฅ ๋ฐ›์œผ๋ฉฐ 1,000์›์œผ๋กœ ๋‚˜๋ˆ„์–ด ๋–จ์–ด์ง€์ง€ ์•Š๋Š” ๊ฒฝ์šฐ ์˜ˆ์™ธ ์ฒ˜๋ฆฌํ•œ๋‹ค.

```
14000
```

- ๋‹น์ฒจ ๋ฒˆํ˜ธ๋ฅผ ์ž…๋ ฅ ๋ฐ›๋Š”๋‹ค. ๋ฒˆํ˜ธ๋Š” ์‰ผํ‘œ(,)๋ฅผ ๊ธฐ์ค€์œผ๋กœ ๊ตฌ๋ถ„ํ•œ๋‹ค.

```
1,2,3,4,5,6
```

- ๋ณด๋„ˆ์Šค ๋ฒˆํ˜ธ๋ฅผ ์ž…๋ ฅ ๋ฐ›๋Š”๋‹ค.

```
7
```

#### ์ถœ๋ ฅ

- ๋ฐœํ–‰ํ•œ ๋กœ๋˜ ์ˆ˜๋Ÿ‰ ๋ฐ ๋ฒˆํ˜ธ๋ฅผ ์ถœ๋ ฅํ•œ๋‹ค. ๋กœ๋˜ ๋ฒˆํ˜ธ๋Š” ์˜ค๋ฆ„์ฐจ์ˆœ์œผ๋กœ ์ •๋ ฌํ•˜์—ฌ ๋ณด์—ฌ์ค€๋‹ค.

```
8๊ฐœ๋ฅผ ๊ตฌ๋งคํ–ˆ์Šต๋‹ˆ๋‹ค.
[8, 21, 23, 41, 42, 43]
[3, 5, 11, 16, 32, 38]
[7, 11, 16, 35, 36, 44]
[1, 8, 11, 31, 41, 42]
[13, 14, 16, 38, 42, 45]
[7, 11, 30, 40, 42, 43]
[2, 13, 22, 32, 38, 45]
[1, 3, 5, 14, 22, 45]
```

- ๋‹น์ฒจ ๋‚ด์—ญ์„ ์ถœ๋ ฅํ•œ๋‹ค.

```
3๊ฐœ ์ผ์น˜ (5,000์›) - 1๊ฐœ
4๊ฐœ ์ผ์น˜ (50,000์›) - 0๊ฐœ
5๊ฐœ ์ผ์น˜ (1,500,000์›) - 0๊ฐœ
5๊ฐœ ์ผ์น˜, ๋ณด๋„ˆ์Šค ๋ณผ ์ผ์น˜ (30,000,000์›) - 0๊ฐœ
6๊ฐœ ์ผ์น˜ (2,000,000,000์›) - 0๊ฐœ
```

- ์ˆ˜์ต๋ฅ ์€ ์†Œ์ˆ˜์  ๋‘˜์งธ ์ž๋ฆฌ์—์„œ ๋ฐ˜์˜ฌ๋ฆผํ•œ๋‹ค. (ex. 100.0%, 51.5%, 1,000,000.0%)

```
์ด ์ˆ˜์ต๋ฅ ์€ 62.5%์ž…๋‹ˆ๋‹ค.
```

- ์˜ˆ์™ธ ์ƒํ™ฉ ์‹œ ์—๋Ÿฌ ๋ฌธ๊ตฌ๋ฅผ ์ถœ๋ ฅํ•ด์•ผ ํ•œ๋‹ค. ๋‹จ, ์—๋Ÿฌ ๋ฌธ๊ตฌ๋Š” "[ERROR]"๋กœ ์‹œ์ž‘ํ•ด์•ผ ํ•œ๋‹ค.

```
[ERROR] ๋กœ๋˜ ๋ฒˆํ˜ธ๋Š” 1๋ถ€ํ„ฐ 45 ์‚ฌ์ด์˜ ์ˆซ์ž์—ฌ์•ผ ํ•ฉ๋‹ˆ๋‹ค.
```

#### ์‹คํ–‰ ๊ฒฐ๊ณผ ์˜ˆ์‹œ

```
๊ตฌ์ž…๊ธˆ์•ก์„ ์ž…๋ ฅํ•ด ์ฃผ์„ธ์š”.
8000

8๊ฐœ๋ฅผ ๊ตฌ๋งคํ–ˆ์Šต๋‹ˆ๋‹ค.
[8, 21, 23, 41, 42, 43]
[3, 5, 11, 16, 32, 38]
[7, 11, 16, 35, 36, 44]
[1, 8, 11, 31, 41, 42]
[13, 14, 16, 38, 42, 45]
[7, 11, 30, 40, 42, 43]
[2, 13, 22, 32, 38, 45]
[1, 3, 5, 14, 22, 45]

๋‹น์ฒจ ๋ฒˆํ˜ธ๋ฅผ ์ž…๋ ฅํ•ด ์ฃผ์„ธ์š”.
1,2,3,4,5,6

๋ณด๋„ˆ์Šค ๋ฒˆํ˜ธ๋ฅผ ์ž…๋ ฅํ•ด ์ฃผ์„ธ์š”.
7

๋‹น์ฒจ ํ†ต๊ณ„
---
3๊ฐœ ์ผ์น˜ (5,000์›) - 1๊ฐœ
4๊ฐœ ์ผ์น˜ (50,000์›) - 0๊ฐœ
5๊ฐœ ์ผ์น˜ (1,500,000์›) - 0๊ฐœ
5๊ฐœ ์ผ์น˜, ๋ณด๋„ˆ์Šค ๋ณผ ์ผ์น˜ (30,000,000์›) - 0๊ฐœ
6๊ฐœ ์ผ์น˜ (2,000,000,000์›) - 0๊ฐœ
์ด ์ˆ˜์ต๋ฅ ์€ 62.5%์ž…๋‹ˆ๋‹ค.
```

---

## ๐ŸŽฏ ํ”„๋กœ๊ทธ๋ž˜๋ฐ ์š”๊ตฌ ์‚ฌํ•ญ

- JDK 11 ๋ฒ„์ „์—์„œ ์‹คํ–‰ ๊ฐ€๋Šฅํ•ด์•ผ ํ•œ๋‹ค. **JDK 11์—์„œ ์ •์ƒ์ ์œผ๋กœ ๋™์ž‘ํ•˜์ง€ ์•Š์„ ๊ฒฝ์šฐ 0์  ์ฒ˜๋ฆฌํ•œ๋‹ค.**
- ํ”„๋กœ๊ทธ๋žจ ์‹คํ–‰์˜ ์‹œ์ž‘์ ์€ `Application`์˜ `main()`์ด๋‹ค.
- `build.gradle` ํŒŒ์ผ์„ ๋ณ€๊ฒฝํ•  ์ˆ˜ ์—†๊ณ , ์™ธ๋ถ€ ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ๋ฅผ ์‚ฌ์šฉํ•˜์ง€ ์•Š๋Š”๋‹ค.
- [Java ์ฝ”๋“œ ์ปจ๋ฒค์…˜](https://github.com/woowacourse/woowacourse-docs/tree/master/styleguide/java) ๊ฐ€์ด๋“œ๋ฅผ ์ค€์ˆ˜ํ•˜๋ฉฐ ํ”„๋กœ๊ทธ๋ž˜๋ฐํ•œ๋‹ค.
- ํ”„๋กœ๊ทธ๋žจ ์ข…๋ฃŒ ์‹œ `System.exit()`๋ฅผ ํ˜ธ์ถœํ•˜์ง€ ์•Š๋Š”๋‹ค.
- ํ”„๋กœ๊ทธ๋žจ ๊ตฌํ˜„์ด ์™„๋ฃŒ๋˜๋ฉด `ApplicationTest`์˜ ๋ชจ๋“  ํ…Œ์ŠคํŠธ๊ฐ€ ์„ฑ๊ณตํ•ด์•ผ ํ•œ๋‹ค. **ํ…Œ์ŠคํŠธ๊ฐ€ ์‹คํŒจํ•  ๊ฒฝ์šฐ 0์  ์ฒ˜๋ฆฌํ•œ๋‹ค.**
- ํ”„๋กœ๊ทธ๋ž˜๋ฐ ์š”๊ตฌ ์‚ฌํ•ญ์—์„œ ๋‹ฌ๋ฆฌ ๋ช…์‹œํ•˜์ง€ ์•Š๋Š” ํ•œ ํŒŒ์ผ, ํŒจํ‚ค์ง€ ์ด๋ฆ„์„ ์ˆ˜์ •ํ•˜๊ฑฐ๋‚˜ ์ด๋™ํ•˜์ง€ ์•Š๋Š”๋‹ค.
- indent(์ธ๋ดํŠธ, ๋“ค์—ฌ์“ฐ๊ธฐ) depth๋ฅผ 3์ด ๋„˜์ง€ ์•Š๋„๋ก ๊ตฌํ˜„ํ•œ๋‹ค. 2๊นŒ์ง€๋งŒ ํ—ˆ์šฉํ•œ๋‹ค.
- ์˜ˆ๋ฅผ ๋“ค์–ด while๋ฌธ ์•ˆ์— if๋ฌธ์ด ์žˆ์œผ๋ฉด ๋“ค์—ฌ์“ฐ๊ธฐ๋Š” 2์ด๋‹ค.
- ํžŒํŠธ: indent(์ธ๋ดํŠธ, ๋“ค์—ฌ์“ฐ๊ธฐ) depth๋ฅผ ์ค„์ด๋Š” ์ข‹์€ ๋ฐฉ๋ฒ•์€ ํ•จ์ˆ˜(๋˜๋Š” ๋ฉ”์„œ๋“œ)๋ฅผ ๋ถ„๋ฆฌํ•˜๋ฉด ๋œ๋‹ค.
- 3ํ•ญ ์—ฐ์‚ฐ์ž๋ฅผ ์“ฐ์ง€ ์•Š๋Š”๋‹ค.
- ํ•จ์ˆ˜(๋˜๋Š” ๋ฉ”์„œ๋“œ)๊ฐ€ ํ•œ ๊ฐ€์ง€ ์ผ๋งŒ ํ•˜๋„๋ก ์ตœ๋Œ€ํ•œ ์ž‘๊ฒŒ ๋งŒ๋“ค์–ด๋ผ.
- JUnit 5์™€ AssertJ๋ฅผ ์ด์šฉํ•˜์—ฌ ๋ณธ์ธ์ด ์ •๋ฆฌํ•œ ๊ธฐ๋Šฅ ๋ชฉ๋ก์ด ์ •์ƒ ๋™์ž‘ํ•จ์„ ํ…Œ์ŠคํŠธ ์ฝ”๋“œ๋กœ ํ™•์ธํ•œ๋‹ค.

### ์ถ”๊ฐ€๋œ ์š”๊ตฌ ์‚ฌํ•ญ

- ํ•จ์ˆ˜(๋˜๋Š” ๋ฉ”์„œ๋“œ)์˜ ๊ธธ์ด๊ฐ€ 15๋ผ์ธ์„ ๋„˜์–ด๊ฐ€์ง€ ์•Š๋„๋ก ๊ตฌํ˜„ํ•œ๋‹ค.
- ํ•จ์ˆ˜(๋˜๋Š” ๋ฉ”์„œ๋“œ)๊ฐ€ ํ•œ ๊ฐ€์ง€ ์ผ๋งŒ ์ž˜ ํ•˜๋„๋ก ๊ตฌํ˜„ํ•œ๋‹ค.
- else ์˜ˆ์•ฝ์–ด๋ฅผ ์“ฐ์ง€ ์•Š๋Š”๋‹ค.
- ํžŒํŠธ: if ์กฐ๊ฑด์ ˆ์—์„œ ๊ฐ’์„ returnํ•˜๋Š” ๋ฐฉ์‹์œผ๋กœ ๊ตฌํ˜„ํ•˜๋ฉด else๋ฅผ ์‚ฌ์šฉํ•˜์ง€ ์•Š์•„๋„ ๋œ๋‹ค.
- else๋ฅผ ์“ฐ์ง€ ๋ง๋ผ๊ณ  ํ•˜๋‹ˆ switch/case๋กœ ๊ตฌํ˜„ํ•˜๋Š” ๊ฒฝ์šฐ๊ฐ€ ์žˆ๋Š”๋ฐ switch/case๋„ ํ—ˆ์šฉํ•˜์ง€ ์•Š๋Š”๋‹ค.
- Java Enum์„ ์ ์šฉํ•œ๋‹ค.
- ๋„๋ฉ”์ธ ๋กœ์ง์— ๋‹จ์œ„ ํ…Œ์ŠคํŠธ๋ฅผ ๊ตฌํ˜„ํ•ด์•ผ ํ•œ๋‹ค. ๋‹จ, UI(System.out, System.in, Scanner) ๋กœ์ง์€ ์ œ์™ธํ•œ๋‹ค.
- ํ•ต์‹ฌ ๋กœ์ง์„ ๊ตฌํ˜„ํ•˜๋Š” ์ฝ”๋“œ์™€ UI๋ฅผ ๋‹ด๋‹นํ•˜๋Š” ๋กœ์ง์„ ๋ถ„๋ฆฌํ•ด ๊ตฌํ˜„ํ•œ๋‹ค.
- ๋‹จ์œ„ ํ…Œ์ŠคํŠธ ์ž‘์„ฑ์ด ์ต์ˆ™ํ•˜์ง€ ์•Š๋‹ค๋ฉด `test/java/lotto/LottoTest`๋ฅผ ์ฐธ๊ณ ํ•˜์—ฌ ํ•™์Šตํ•œ ํ›„ ํ…Œ์ŠคํŠธ๋ฅผ ๊ตฌํ˜„ํ•œ๋‹ค.

### ๋ผ์ด๋ธŒ๋Ÿฌ๋ฆฌ

- [`camp.nextstep.edu.missionutils`](https://github.com/woowacourse-projects/mission-utils)์—์„œ ์ œ๊ณตํ•˜๋Š” `Randoms` ๋ฐ `Console` API๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ๊ตฌํ˜„ํ•ด์•ผ ํ•œ๋‹ค.
- Random ๊ฐ’ ์ถ”์ถœ์€ `camp.nextstep.edu.missionutils.Randoms`์˜ `pickUniqueNumbersInRange()`๋ฅผ ํ™œ์šฉํ•œ๋‹ค.
- ์‚ฌ์šฉ์ž๊ฐ€ ์ž…๋ ฅํ•˜๋Š” ๊ฐ’์€ `camp.nextstep.edu.missionutils.Console`์˜ `readLine()`์„ ํ™œ์šฉํ•œ๋‹ค.

#### ์‚ฌ์šฉ ์˜ˆ์‹œ

```java
List numbers = Randoms.pickUniqueNumbersInRange(1, 45, 6);
```

### Lotto ํด๋ž˜์Šค

- ์ œ๊ณต๋œ `Lotto` ํด๋ž˜์Šค๋ฅผ ํ™œ์šฉํ•ด ๊ตฌํ˜„ํ•ด์•ผ ํ•œ๋‹ค.
- `Lotto`์— ๋งค๊ฐœ ๋ณ€์ˆ˜๊ฐ€ ์—†๋Š” ์ƒ์„ฑ์ž๋ฅผ ์ถ”๊ฐ€ํ•  ์ˆ˜ ์—†๋‹ค.
- `numbers`์˜ ์ ‘๊ทผ ์ œ์–ด์ž์ธ private์„ ๋ณ€๊ฒฝํ•  ์ˆ˜ ์—†๋‹ค.
- `Lotto`์— ํ•„๋“œ(์ธ์Šคํ„ด์Šค ๋ณ€์ˆ˜)๋ฅผ ์ถ”๊ฐ€ํ•  ์ˆ˜ ์—†๋‹ค.
- `Lotto`์˜ ํŒจํ‚ค์ง€ ๋ณ€๊ฒฝ์€ ๊ฐ€๋Šฅํ•˜๋‹ค.

```java
public class Lotto {
private final List numbers;

public Lotto(List numbers) {
validate(numbers);
this.numbers = numbers;
}

private void validate(List numbers) {
if (numbers.size() != 6) {
throw new IllegalArgumentException();
}
}

// TODO: ์ถ”๊ฐ€ ๊ธฐ๋Šฅ ๊ตฌํ˜„
}
```

---

## โœ๏ธ ๊ณผ์ œ ์ง„ํ–‰ ์š”๊ตฌ ์‚ฌํ•ญ

- ๋ฏธ์…˜์€ [java-lotto](https://github.com/woowacourse-precourse/java-lotto) ์ €์žฅ์†Œ๋ฅผ Fork & Cloneํ•ด ์‹œ์ž‘ํ•œ๋‹ค.
- **๊ธฐ๋Šฅ์„ ๊ตฌํ˜„ํ•˜๊ธฐ ์ „ `docs/README.md`์— ๊ตฌํ˜„ํ•  ๊ธฐ๋Šฅ ๋ชฉ๋ก์„ ์ •๋ฆฌ**ํ•ด ์ถ”๊ฐ€ํ•œ๋‹ค.
- **Git์˜ ์ปค๋ฐ‹ ๋‹จ์œ„๋Š” ์•ž ๋‹จ๊ณ„์—์„œ `docs/README.md`์— ์ •๋ฆฌํ•œ ๊ธฐ๋Šฅ ๋ชฉ๋ก ๋‹จ์œ„**๋กœ ์ถ”๊ฐ€ํ•œ๋‹ค.
- [์ปค๋ฐ‹ ๋ฉ”์‹œ์ง€ ์ปจ๋ฒค์…˜](https://gist.github.com/stephenparish/9941e89d80e2bc58a153) ๊ฐ€์ด๋“œ๋ฅผ ์ฐธ๊ณ ํ•ด ์ปค๋ฐ‹ ๋ฉ”์‹œ์ง€๋ฅผ ์ž‘์„ฑํ•œ๋‹ค.
- ๊ณผ์ œ ์ง„ํ–‰ ๋ฐ ์ œ์ถœ ๋ฐฉ๋ฒ•์€ [ํ”„๋ฆฌ์ฝ”์Šค ๊ณผ์ œ ์ œ์ถœ](https://github.com/woowacourse/woowacourse-docs/tree/master/precourse) ๋ฌธ์„œ๋ฅผ ์ฐธ๊ณ ํ•œ๋‹ค.