java - 错误: orphaned default using case statement in Java

Question

所以这是我的代码，我试图让用户在不输入满足先前情况的内容时必须重新输入。任何和所有的帮助表示赞赏。

public static void main(String[] args) {
    Scanner kb = new Scanner(System.in);
    ArrayList<Room> rooms = new ArrayList<Room>();
    boolean proj, flag;
    String rN, line, os = null;
    int cap = 0;

    int response = 0;
    do {
        System.out.println("Press: 1 to add a general purpose Room \n"
                + "Press: 2 to add a Computer Room \n"
                + "Press: 3 to display information about stored rooms \n"
                + "Press: 4 to display all rooms with projectors \n"
                + "Press: 5 to enter a number of attendees and display possible rooms. \n"
                + "Press: -1 to Exit");
        response = kb.nextInt();
        switch (response) {
            case 1:
                there is code here-
            case 3:
                there is code here-
            case 4:
                there is code here-
            case 5:
                there is code here-
            case 6:
                there is code here-

            default:
                System.out.println("Not understood. Re-enter");
                break;

                } while (response != -1);
        }

我给出的错误是孤立的默认错误 - 我已从其他情况下删除了代码，因为它不允许我提出其他问题。

Answer 1

您的 while 语句似乎位于错误的位置，这可能会导致错误。

 do {
    System.out.println("Press: 1 to add a general purpose Room \n"
            + "Press: 2 to add a Computer Room \n"
            + "Press: 3 to display information about stored rooms \n"
            + "Press: 4 to display all rooms with projectors \n"
            + "Press: 5 to enter a number of attendees and display possible rooms. \n"
            + "Press: -1 to Exit");

    response = kb.nextInt();
    switch (response) 
       {
            case 1:
                there is code here-
            case 3:
                there is code here-
            case 4:
                there is code here-
            case 5:
                there is code here-
            case 6:
                there is code here-
            case -1:
                System.out.println("Exiting program");
                break;
            default:
                System.out.println("Not understood. Re-enter");
                break;
        }

    }while (response != -1);

确保它位于 Do-While 循环的末尾，而不是像以前那样位于内部。