当我尝试运行我的代码时，这就是我得到的错误：
Exception in thread "main" java.util.NoSuchElementException
at java.util.Scanner.throwFor(Scanner.java:862)
at java.util.Scanner.next(Scanner.java:1485)
at java.util.Scanner.nextInt(Scanner.java:2117)
at java.util.Scanner.nextInt(Scanner.java:2076)
at Main.main(Main.java:86)
我尝试在线搜索但没有找到任何内容，这是我的完整代码： （我相信我的代码完全正常，并且没有实际的＆＃34;错误＆＃34;尽管如此）
import java.util.*;
class Account{
String name,acc_type;
int Acc_num,Acc_Balance;
Account(){
}
Account(String n,int acc_num,int b,String a_t){
name=n;
Acc_num=acc_num;
Acc_Balance=b;
acc_type=a_t;
}
} // end class
class create_account extends Account{
create_account(String n,int acc_num,int b,String a_t){ // pass name and account type
name=n;
Acc_num=acc_num;
Acc_Balance=b;
acc_type=a_t;
}
create_account(){
super();
}
void insert(String n,int acc_num,String a_t){ // input user name, account number and type
name=n;
acc_type=a_t;
Acc_num=acc_num; // generate random number
Acc_Balance=0;
}
void display_details(){
System.out.println("Depositor Name :" +name);
System.out.println("Account Number : "+Acc_num);
System.out.println("Account Balance : "+Acc_Balance);
System.out.println("Account Type : "+acc_type);
}
void deposite(int acc_num,int money){
Acc_Balance=money;
}
int withdraw(int withd){
Acc_Balance=Acc_Balance-withd;
return Acc_Balance;
}
} // end class
public class Main {
public static void main(String args[]){
String user_name=null,type;
type = null;
int balance=0,tmp=0;
int withd=0,cb=0;
// to generate Random Account Number
int aNumber = 0;
aNumber = (int)((Math.random() * 9000)+1000);
create_account user = new create_account("user",0,0,"savings"); // initilaize -- name,acc_number,Balance,Type
Scanner in = new Scanner(System.in);
Scanner strng=new Scanner(System.in);
int userChoice;
boolean quit = false;
do {
System.out.println("1. Create Account");
System.out.println("2. Deposit money");
System.out.println("3. Withdraw money");
System.out.println("4. Check balance");
System.out.println("5. Display Account Details");
System.out.println("0. to quit: \n");
System.out.print("Enter Your Choice : ");
userChoice = in.nextInt();
switch (userChoice) {
case 1:
System.out.print("Enter your Name : ");
user_name=strng.nextLine();
System.out.print("Enter Accout Type : ");
type=in.next();
user.insert(user_name, aNumber, type); // inserted
System.out.println("\n\tYour Account Details\n\tDont Forget Account Number\n");
System.out.println("**************************");
user.display_details();
break;
case 2: // deposite
System.out.print("Enter your account Number : ");
tmp=in.nextInt();
if(tmp==user.Acc_num){
System.out.print("Enter Amount Of Money : ");
balance=in.nextInt();
user.Acc_Balance=balance;
System.out.println("\t Successfully Deposited.");
}
else
System.out.println("Wrong Accoount Number.");
break;
case 3: // withdraw money
System.out.print("Enter your account Number : ");
tmp=in.nextInt();
if(tmp==user.Acc_num){
if(user.Acc_Balance==0)
System.out.print("Your Account is Empty.");
else{
System.out.print("Enter Amout Of Money : ");
withd=in.nextInt();
if(withd>user.Acc_Balance){
System.out.print("Enter Valid Amout of Money : ");
withd=in.nextInt();
}
else
cb= user.withdraw(withd);
System.out.println("Your Current Balance : "+cb);
}
}
else
System.out.println("Wrong Accoount Number.");
break;
case 4: // check balance
System.out.print("Enter your Account Number : ");
tmp=in.nextInt();
if(tmp==user.Acc_num){
System.out.println("Your Current Balance : "+user.Acc_Balance);
}
else
System.out.println("Wrong Accoount Number.");
break;
case 5: // display all info
System.out.print("Enter your Account Number :");
tmp=in.nextInt();
if(tmp==user.Acc_num){
user.display_details();
}else
System.out.println("Wrong Accoount Number.");
break;
case 0:
quit = true;
break;
default:
System.out.println("Wrong Choice.");
break;
}
System.out.println("\n");
} while (!quit);
System.out.println("Thanks !");
} // end main function
} // end main class
我希望你们能帮助我解决这个问题，因为我从来没有遇到过这样的问题，老实说我不确定如何解决这个问题。
尝试使用不同的编译器，但没有解决这个问题
我也尝试过添加和删除代码，但没有解决问题，这就是我制作这个帖子的原因..我不是在没有查看所有其他类似问题的情况下做到这一点。
答案 0 :(得分：-1)
class Main {
public static void main(String args[]){
String user_name=null,type;
type = null;
int balance=0,tmp=0;
int withd=0,cb=0;
从公共类主中删除公开关键字，并仅使用类Main ，以便您的代码正常运行。