Java Do-While循环

Question

我想要提示用户是否想继续( y /n)，但我的代码只是重复到我的ans。我如何修改代码到循环？感谢你的帮助谢谢

``` public static void main(String[] args){

Scanner kb = new Scanner(System.in);

Scanner input = new Scanner(System.in);

String grade = "";

Scanner inputScanner = new Scanner(System.in);

String userInput = "";

do{

System.out.print("Enter your serial no: ");

int serial = kb.nextInt();

System.out.print("Enter Score: ");

int score = kb.nextInt();

if(score<0||score>100){

    System.out.println("Invalid Score");

}else if(score>84){

    grade = "A";

    System.out.println("Your grade is: "+grade);

}else if(score>74){

    grade = "B";

    System.out.println("Your grade is: "+grade);

}else if(score>64){

    grade = "C";

    System.out.println("Your grade is: "+grade);

}else if(score>49){

    grade = "D";

    System.out.println("Your grade is: "+grade);

}else{

    grade = "F";

    System.out.println("Your grade is: "+grade);

}

    System.out.println("Do you want to continue y/n");

    userInput = input.nextLine();

}while(input.next().equalsIgnoreCase("y"));

input.close();```

Answer 1

你在代码上有一个错误。您在userInput字段上获得了值，但您没有使用它。您必须删除此行：

userInput = input.nextLine();

它会解决你的问题