java 异常 java.util.InputMismatchException

Question

我基本上只在用户输入零时才尝试结束程序，否则继续循环输入进行处理。

我有一个关于发生了什么的问题，每当我尝试编译它时，它总是给我一个像这样的错误:

Expected Output Your Output 1 16 1 Exception in thread "main"java.util.InputMismatchException 2 Tom 69.28 2 at java.util.Scanner.throwFor(Scanner.java:909) 3 Mickey 108.42 3 at java.util.Scanner.next(Scanner.java:1530) 4 Juliet 2488.71 4 at java.util.Scanner.nextInt(Scanner.java:2160) 5 Ann 2201.94 5 at java.util.Scanner.nextInt(Scanner.java:2119) 6 Christy 894.14 6 at Bank.main(Bank.java:103)

  public static void main(String[] args) {
 // declare the necessary variables
 double x;
 int p; 
 double balance;

 String name; 
 List<Person> list = new ArrayList<Person>();

 // declare a Scanner object to read input
 Scanner sc = new Scanner(System.in); 
 // read input and process them accordingly
 x = sc.nextDouble();
 p = sc.nextInt(); 

 // while (sc.hasNext() == true)
 String action;
 // {
 do {
 action = sc.next();

 //ArrayList list = new ArrayList(); 

 if (action.equals("Create"))
 {
 do something
 }

 if (action.equals("Withdraw"))
 {

 {
 do something

 }
 }

 }


 if (action.equals("Deposit"))
 {



 // output the result
         }


 if (action.equals("0"))
 {

 System.out.println(list.size());
 for(Person d : list){
 double bal = d.getBalance(); 

 System.out.println(d.getName());

 }     }

 }

 while ( /*action != null &&*/ !action.isEmpty());
 }
 }

Answer 1

Docs

Thrown by a Scanner to indicate that the token retrieved does not match the pattern for the expected type, or that the token is out of range for the expected type.

查看你的堆栈跟踪:

java.util.Scanner.nextInt(Scanner.java:2160) 5 Ann 2201.94 5 at

这意味着您输入的任何内容都不是整数。

p = sc.nextInt();