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illeumilleum
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고생하셨습니다.
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‎src/main/java/Car.java

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import java.util.Random;
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public class Car {
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private String name;
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public Car(String name){
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if (name.isEmpty()){
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throw new IllegalArgumentException();
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}
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this.name = name;
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}
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public String getName(){
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return name;
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}
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public int move(){
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Random ran = new Random();
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if (ran.nextInt(10) >= 4){
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return 1; // 한 칸 이동 (전진)
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}
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return 0;
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}
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}

‎src/main/java/FindWinCar.java

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import java.util.Objects;
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import java.util.stream.IntStream;
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import java.util.Arrays;
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public class FindWinCar {
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private Car[] cars;
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private int[] locate;
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public FindWinCar(int n, Car[] car){
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if (n <= 0){
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throw new IllegalArgumentException();
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}
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this.cars = Objects.requireNonNull(car);
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this.locate = new int[n];
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}
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public void allMove(int times){
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if (times < 0){
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throw new IllegalArgumentException();
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}
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for (int t = 0; t < times; ++t){
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move();
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}
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}
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public void move(){
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for (int r = 0; r < cars.length; ++r){
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locate[r] += cars[r].move();
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}
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}
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public Car[] findWin(){
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int max = Arrays.stream(locate)
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.max()
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.getAsInt();
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return IntStream.range(0, cars.length)
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.filter(i -> locate[i] == max)
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.mapToObj(i -> cars[i])
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.toArray(Car[]::new);
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}
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public int[] getLocate(){
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return locate;
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}
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public Car[] getCars(){
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return cars;
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}
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}

‎src/main/java/GameStart.java

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import java.util.Arrays;
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import java.util.Scanner;
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public class GameStart {
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private static Car[] cars;
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private static int times;
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private static FindWinCar race;
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public static void main(String[] args) {
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carNameInput();
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timesInput();
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// 경기 진행
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race = new FindWinCar(cars.length, cars);
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for (int i = 0; i < times; ++i){
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game();
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}
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// 최종 출력
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print(race.getLocate());
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String winNames = Arrays.stream(race.findWin())
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.map(Car::getName)
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.reduce((a, b) -> a + ", " + b)
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.orElse("");
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System.out.println(winNames + "가 최종 우승했습니다.");
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}
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private static void carNameInput(){
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Scanner in = new Scanner(System.in);
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// 자동차 이름
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System.out.println("경주할 자동차 이름을 입력하세요(이름은 쉼표(,)를 기준으로 구분).");
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String[] carNames = in.nextLine().split(",");
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for (String name : carNames){
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if (name.length() > 5 || name.isEmpty()){
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throw new IllegalArgumentException();
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}
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}
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// 객체 생성
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cars = Arrays.stream(carNames)
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.map(Car::new)
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.toArray(Car[]::new);
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in.close();
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}
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private static void timesInput(){
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Scanner in = new Scanner(System.in);
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// 이동 횟수
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System.out.println("시도할 회수는 몇회인가요?");
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times = in.nextInt();
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if (times < 0){
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throw new IllegalArgumentException();
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}
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in.close();
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}
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private static void game(){
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print(race.getLocate());
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race.move();
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System.out.println();
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}
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private static void print(int[] locate){
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for (int i = 0; i < cars.length; ++i){
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System.out.println(cars[i].getName() + " : " + locate[i]);
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}
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}
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}

‎src/main/java/controller/Application.java

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package controller;
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import domain.RacingGame;
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import view.InputView;
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import view.ResultView;
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public class Application {
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public static void main(final String... args) {
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final String[] carNames = InputView.getCarNames();
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final int tryCount = InputView.getTryCount();
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final var racingGame = new RacingGame(carNames, tryCount);
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racingGame.race();
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ResultView.printWinners(racingGame.getWinners());
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}
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}

‎src/main/java/domain/RacingGame.java

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package domain;
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import java.util.Arrays;
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import java.util.Objects;
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import java.util.stream.IntStream;
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import objectTmp.Car;
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public class RacingGame {
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private static Car[] cars;
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private static int times;
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private static int[] locate;
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public RacingGame(String[] carNames, int times){
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if (times <= 0){
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throw new IllegalArgumentException();
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}
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for (String name : carNames){
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if (name.length() > 5 || name.isEmpty()){
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throw new IllegalArgumentException();
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}
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}
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cars = Arrays.stream(carNames)
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.map(Car::new)
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.toArray(Car[]::new);
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RacingGame.times = times;
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}
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public static void race(){
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for (int i = 0; i < times; ++i){
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print(locate);
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for (int r = 0; r < cars.length; ++r){
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locate[r] += cars[r].move();
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}
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System.out.println();
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}
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}
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public static void print(int[] locate){
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for (int i = 0; i < cars.length; ++i){
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System.out.println(cars[i].getName() + " : " + locate[i]);
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}
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}
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public static Car[] getWinners(){
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int max = Arrays.stream(locate)
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.max()
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.getAsInt();
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return IntStream.range(0, cars.length)
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.filter(i -> locate[i] == max)
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.mapToObj(i -> cars[i])
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.toArray(Car[]::new);
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}
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public static int[] getLocate(){
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return locate;
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}
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}

‎src/main/java/objectTmp/Car.java

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package objectTmp;
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import java.util.Random;
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public class Car {
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private String name;
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public Car(String name){
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if (name.isEmpty()){
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throw new IllegalArgumentException();
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}
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this.name = name;
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}
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public String getName(){
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return name;
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}
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public int move(){
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Random ran = new Random();
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if (ran.nextInt(10) >= 4){
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return 1; // 한 칸 이동 (전진)
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}
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return 0;
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}
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}

‎src/main/java/view/InputView.java

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package view;
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import java.util.Scanner;
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public class InputView {
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static Scanner in = new Scanner(System.in);
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public static String[] getCarNames(){
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System.out.println("경주할 자동차 이름을 입력하세요(이름은 쉼표(,)를 기준으로 구분).");
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String[] carNames = in.nextLine().split(",");
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for (String name : carNames){
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if (name.length() > 5 || name.isEmpty()){
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throw new IllegalArgumentException();
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}
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}
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return carNames;
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}
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public static int getTryCount(){
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System.out.println("시도할 회수는 몇회인가요?");
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int times = in.nextInt();
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if (times < 0){
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throw new IllegalArgumentException();
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}
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return times;
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}
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}

‎src/main/java/view/ResultView.java

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package view;
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import java.util.Arrays;
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import domain.RacingGame;
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import objectTmp.Car;
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public class ResultView {
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public static void printWinners(Car[] winner){
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RacingGame.print(RacingGame.getLocate());
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String winNames = Arrays.stream(winner)
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.map(Car::getName)
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.reduce((a, b) -> a + ", " + b)
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.orElse("");
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System.out.println(winNames + "가 최종 우승했습니다.");
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}
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}

‎src/test/java/CarTest.java

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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertThrows;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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import org.junit.jupiter.api.Test;
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public class CarTest {
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@Test
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public void createTest(){
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Car c = new Car("mercedes");
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assertEquals("mercedes", c.getName());
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}
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@Test
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public void errorTest(){
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assertThrows(NullPointerException.class, ()->new Car(null));
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assertThrows(IllegalArgumentException.class, ()->new Car(""));
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}
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@Test
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public void moveTest(){
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Car c = new Car("a");
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int tmp;
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for (int i = 0; i < 100; i++) {
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tmp = c.move();
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assertTrue(tmp == 1 || tmp == 0);
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}
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}
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}

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