// 2020/1/12(日)
// 2020/1/14(火)L8改変

// HitAndBlow.java
import java.util.*;
import java.util.stream.*;

public class HitAndBlow
{
    private List<String> answer;
    private int digit;
    private MyArrayList<String> inputnum;
    private Scanner scan = new Scanner(System.in);

    public HitAndBlow(int digit)
    {
        this.digit = digit;
        List<String> strs = IntStream.range(0, 10)
                                     .mapToObj(Integer::valueOf)
                                     .map(i -> String.valueOf(i))
                                     .collect(Collectors.toList());
        Collections.shuffle(strs);

        this.answer = strs.stream().skip(10 - this.digit).collect(Collectors.toList());
    }

    public void playgame()
    {
        System.out.println("ヒットアンドブローをします");

        boolean isCorrectAns = false;
        for (int i = 1; true; i++)
        {
            this.inputnumber();
            int hit = this.inputnum.gethit(this.answer);
            if (hit == this.digit)
            {
                System.out.println("正解です！ゲームを終了します。");
                isCorrectAns = true;
                break;
            }

            System.out.println(i + "回目のトライ " + hit + "ヒット！" + this.inputnum.getblow(this.answer) + "ブロー！です");
            System.out.print("続けますか？ 続ける:1を入力 止める:1以外を入力：");

            if (!this.scan.nextLine().equals("1"))
            {
                break;
            }
        }

        if (!isCorrectAns)
        {
            System.out.println("正解は" + String.join("", this.answer) + "でした");
        }
    }

    private void inputnumber()
    {
        do
        {
            System.out.print(this.digit + "桁の数字を入力してください：");
            String line = this.scan.nextLine();

            // 数値に変換可能か
            try
            {
                Integer.parseInt(line);
            }
            catch (NumberFormatException nfex)
            {
                continue;
            }

            // 入力はdigit桁か
            if (line.length() == this.digit)
            {
                this.inputnum = new MyArrayList(Arrays.asList(line.split("")));

                return;
            }
        } while (true);
    }

    public static void main(String[] args)
    {
        new HitAndBlow(4).playgame();
    }
}

// MyArrayList.java
import java.util.*;
import java.util.stream.*;

public class MyArrayList<T> extends ArrayList<T>
{
    public MyArrayList(List<T> other)
    {
        this.addAll(other);
    }

    public int getblow(List<T> other)
    {
        List<T> templist = this.getdigitmatchlist(other);

        List<T> templist2 = (MyArrayList<T>)(this.clone());
        templist2.removeAll(templist);

        int blow = (int)(other.stream()
                              .filter(s -> templist2.contains(s))
                              .count());

        return blow;
    }

    public int gethit(List<T> other)
    {
        return this.getdigitmatchlist(other).size();
    }

    private List<T> getdigitmatchlist(List<T> other)
    {
        List<T> templist = new ArrayList<T>();

        for (int i = 0; i < other.size(); i++)
        {
            if (this.get(i).equals(other.get(i)))
            {
                templist.add(this.get(i));
            }
        }

        return templist;
    }
}