Question

我在java中写了一个小程序用户输入一个数字来获取他的乘法表然后键入该表的最大长度

但在第三种情况下（案例r）我收到了一个错误的孤立案例对我来说似乎是干净的代码

public class JavaApplication2 {

public static void main(String[] args) throws IOException
{
    System.out.println("Multiplication Table v1.0");
    System.out.println("Developped By Roy Jalbout");
    System.out.println("-------------------------");
    System.out.println("Type 'E' To Quit The Program\nType 'H' To Read The Help File\nType 'R' To Run The Program");
    char act = (char)System.in.read();
    switch (act) {
        case 'e':
        case 'E':
           System.exit(0);
           break;
       case 'h':
       case 'H':
           System.out.println("The Multiplication Table Version 1.0 Developped By Roy Jalbout is A Simple Program All you have to do is to choose the number that you want to get his multiplication table and then choose the maximum lenght of that table");
           System.out.println("----------------------------------");
           System.out.println("Type back to go to the main thread");
           String mainthread = scn.next();
           if ("back".equals(mainthread)){
               JavaApplication2.main(args);
               break;
       case 'r':
       case 'R':
             Scanner scn = new Scanner(System.in);
               System.out.print("Enter A Number To Get His Multiplication Table : ");
           int num = scn.nextInt();
           System.out.print("Enter The Max Number Of The Multiplication Table : ");
           int max = scn.nextInt();
           int b=1;
          while (b<=max){
               System.out.println(num + " * " + b + " = " + b*num);
               b++;
               JavaApplication2.main(args);
           }   
    default:
               System.out.println(act + " is an Invalid Choice");
           }
    }
    }
}

任何帮助???

Answer 1

       if ("back".equals(mainthread)){
           JavaApplication2.main(args);// you are not closing the brace here..
           break;

Answer 2

对于我来说，孤儿案的问题是，在我开始切换案例之后，有一些没有封闭的大括号。例如，我没有关闭的箱子里面有一个环。一旦我关闭就没有障碍了

switch语句中的孤立大小写错误

2 个答案: