java - g.等于位置错误？程序每次都会关闭

Question

你好，我想制作一个测验应用程序，到目前为止我已经做到了。

import java.util.Scanner;
public class Brotcrunsher {
  public static void main(String args[]){
    Scanner scan = new Scanner(System.in);

    System.out.println ("Hallo");
    System.out.println ("Welcome to the test");
    System.out.println ("If you are the admin of the test and would like to edit it please type the password now");
    System.out.println ("Otherwhise please say 'begin' to start");
    String c = scan.nextLine();
    if (c.equals ("edit")) {
      System.out.println ("Editor mode coming soon, please edit via code"); 
    } 
    else {
      if (c.equals ("begin")) {  
      } // end of if
      System.out.println ("A flag has more then 1 color right?");
      String a = scan.nextLine();
      if (a.equals("ja")) {
        System.out.println ("You arent dumb, nice.");
        System.out.println ("What is 352 + 223");
        int b = scan.nextInt(); 
        if (b == 575) {
          System.out.println ("That is correct nice");
          System.out.println ("You passed the basic questions, going to be tricky now");
          System.out.println ("What was the date when Donald Trump became president");
          String g = scan.nextLine();
          System.out.println ("A = 19.01 B = 20.01 C = 21.01 D= 22.01");
          if (g.equals ("B")){
            System.out.println ("You are right, lets move on.");
          } // end of if
          else {
            System.out.println ("That is wrong. Better luck next time");
          } // end of if-else  
        }  
        else {
          System.out.println("That isn't right, you failed.");
          System.out.println ("If you'd like to repeat the test, go ahead and do so");
        }  
      }
      else {
        System.out.println ("You arentn a genie");
      } 
    }
  } 
}

所以我的问题是我需要将 String g = scan.NextLine 放置在哪里才能使其正常工作？我没有收到任何编译错误，只是控制台退出。我尝试将它放在 IF 语句的开头和其他一些位置，但它就停止了。请帮忙。

Answer 1

如果控制台在您运行应用程序时关闭，那么您可能会收到运行时错误。尝试从已打开的命令 shell 运行您的程序以查看错误。

这应该是一条评论，但我没有足够的代表 0:)