Java扫描仪NextInt问题，在输入字符串和回路时需要停止错误

Question

    private static int getNumberOfPlayers() {
    System.out.println("Please enter number of players ");
    Scanner sc = new Scanner(System.in);
    int numOfPlayers = sc.nextInt();
    System.out.println("You have selected " + numOfPlayers + " Players");
    // controlling input, at least 2 - at most 4 players can play the game
    while (numOfPlayers < MIN_NUM_PLAYERS || numOfPlayers > MAX_NUM_PLAYERS) {
        System.out.print("Please enter a number between 2 and 4: ");
        numOfPlayers = sc.nextInt();
        System.out.println("You have selected " + numOfPlayers + " players");
    }
    return numOfPlayers;
}

当玩家输入并在此处进入其他任何内容时，游戏崩溃了。我希望Sout消息告诉用户和回路，以便他们可以重试而不是崩溃。有人可以帮助我修改此方法以实现此功能。任何帮助将不胜感激。

Answer 1

只需这样的异常刻板即可。这可能就是您想要的：

 private static int getNumber() {
System.out.println("Please enter number of players ");
Scanner sc = new Scanner(System.in);
int numOfPlayers = sc.nextInt();
System.out.println("You have selected " + numOfPlayers + " Players");
int  newNumOfPlayers;
// controlling input, at least 2 - at most 4 players can play the game
while(true){
if (numOfPlayers < MIN_NUM_PLAYERS || numOfPlayers > MAX_NUM_PLAYERS) {
    System.out.print("Please enter a number between 2 and 4: ");
    try{
   newNumOfPlayers = sc.nextInt();
    }catch(Exception ex){
         System.out.println("Please select a number only");
         sc.next();
         continue;
    }
    numOfPlayers = newNumOfPlayers;
    System.out.println("You have selected " + numOfPlayers + " players");
    return numOfPlayers;
}
}
}