Java不继续循环

我正在制作一个简单的for循环，以遍历ArrayList并向其中添加对象，但当我输入第一个对象时，什么都没有发生。看起来程序没有继续循环。以下是我所拥有的：

for (int i = 0; i < (numPlayers.nextInt()-1); i++){
    System.out.println("what is player " + (i + 1) + " name?");
    Scanner namePlayer = new Scanner(System.in);
    String playerName = namePlayer.nextLine();
    playerList.add(new Player(playerName));
}

---

如果可能，只需定义一次循环的限制：

int numberOfPlayers = numPlayers.nextInt()-1;
for (int i = 0; i < numberOfPlayers; i++){
    System.out.println("what is player " + (i + 1) + " name?");
    Scanner namePlayer = new Scanner(System.in);
    String playerName = namePlayer.nextLine();
    playerList.add(new Player(playerName));
}

您需要确保循环的迭代次数与您想要的次数相同

public static void main(String[] args)
    {
        Scanner numPlayers = new Scanner(System.in);
        ArrayList<Player> playerList = new ArrayList<>();
        int input = numPlayers.nextInt();

        for (int i = 0; i < input; i++){
            System.out.println("what is player " + (i + 1) + " name?");
            String playerName = numPlayers.next();
            playerList.add(new Player(playerName));
        }

    }

您应该在for循环外部声明scanner对象。代码的问题是，每次输入字符串后，都需要代码为int i=0提供一个整数；i请提供一个参数。什么是numPlayers？移动扫描仪名称player=new ScannerSystem.in；不管numPlayers是什么，每次循环迭代时都会提供一个新值。您提供的第二个值是多少？如果该值小于2，则循环将按照指示终止。每次调用nextInt时，它都会读取一个新的int。我假设您打算将numPlayers.nextInt放入局部变量，因此只调用一次。

public static void main(String[] args)
    {
        Scanner numPlayers = new Scanner(System.in);
        ArrayList<Player> playerList = new ArrayList<>();
        int input = numPlayers.nextInt();

        for (int i = 0; i < input; i++){
            System.out.println("what is player " + (i + 1) + " name?");
            String playerName = numPlayers.next();
            playerList.add(new Player(playerName));
        }

    }