错误：Java中使用case语句的孤立默认值

这是我的代码，我试图让用户重新输入，如果他们没有输入满足前面案例的内容。感谢您的帮助

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);
        }

publicstaticvoidmain（字符串[]args）{
扫描仪kb=新扫描仪（System.in）；
ArrayList房间=新建ArrayList（）；
布尔项目，标志；
字符串rN，line，os=null；
int cap=0；
int响应=0；
做{
System.out.println（“按：1添加通用房间\n”
+“按：2添加计算机室\n”
+“按：3显示有关存储室的信息\n”
+“按：4显示所有带投影仪的房间\n”
+“按：5输入与会者人数并显示可能的会议室。\n”
+“按：-1退出”）；
response=kb.nextInt（）；
开关（响应）{
案例1：
这里有代码-
案例3：
这里有代码-
案例4：
这里有代码-
案例5：
这里有代码-
案例6：
这里有代码-
违约：
System.out.println（“未理解。重新输入”）；
打破
}while（响应！=-1）；
}

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

这对我很有用：

import java.util.Scanner;

public class Test
{

    public static void main(String[] args)
    {
        Scanner kb = new Scanner(System.in);

        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-
                    break;
                case 3:
                    //                        there is code here-
                    break;
                case 4:
                    //                        there is code here-
                    break;
                case 5:
                    //                        there is code here-
                    break;
                case 6:
                    //                        there is code here-
                    break;

                case -1:
                    System.out.println("Bye!");
                    break;

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

            }
        }
        while (response != -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。

我是在从以下内容中提取剩余内容时得到此信息的：

将交换机转换为if-else块。

给出“孤立默认值”错误的最小示例：

---

你是否在每一个“案例”的结尾都有一个“中断”？如果你能把它变成一个简短但完整的程序来演示问题（并且更合理地缩进你的代码），那会很有帮助。在“while”之前有一个}缺失。当用户输入-1时，这仍然会显示“未理解…”如果你已经更新了它，我更关心循环工作的语法。谢谢你让我知道。

  public static void whatever(){
      if( true ){      
          default: return; 
      };;
  };;