这是我的银行帐户计划，用户可以在其中添加，取款和查看帐户详细信息。此数据在客户端和服务器之间来回传递。我为这一行得到了这个NoSuchElementException： temp1 = sScan.nextInt（）; 我从服务器接受menuchoice的地方。为什么是这样？我只是用它来回到客户端。
这是客户端代码：
import java.io.IOException;
import java.io.PrintStream;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;
public class Main {
public static void main(String args[]) {
{
String user_name=null,type,temp;
type = null;
int balance=0,tmp=0,temp1=0;
int withdraw=0,currentBal=0;
int randNumber = 0;
randNumber = (int)((Math.random() * 9000)+1000);
//create_account use = new create_account("user",0,"savings");
Scanner in = new Scanner(System.in);
Scanner strng=new Scanner(System.in);
try{
//new socket for communicatio
Socket s = new Socket("127.0.0.1", 4);
//scanner for accepting data from serve
Scanner sScan = new Scanner(s.getInputStream());
//new printstream for passing values to server
PrintStream p = new PrintStream(s.getOutputStream());
String str = sScan.nextLine();
System.out.println(str);
int userChoice;
boolean quit = false;
System.out.println("Welcome to UNCC Banking, please select from the menu");
do {
//present menu
System.out.println("1. Deposit money");
System.out.println("2. Withdraw money");
System.out.println("3. Check balance");
System.out.println("0. to quit: \n");
System.out.print("Enter Your Choice : ");
//send userChoice to Server?
userChoice = in.nextInt();
p.println(userChoice);
//get number from server?
temp1 = sScan.nextInt();
switch (userChoice) {
case 1: // deposit
//p.println(tmp);
//temp1 = sScan.nextInt();
System.out.print("Enter Amount Of Money : ");
balance=in.nextInt();
p.println(balance);
int money = sScan.nextInt();
//user.Acc_Balance=balance;
System.out.println("\t Successfully Deposited.");
break;
case 2: // withdraw money
p.println("get withdraw");
int money2 = sScan.nextInt();
if(money2==0)
System.out.print("Your Account is Empty.");
else{
System.out.print("Enter Amount Of Money : ");
withdraw=in.nextInt();
p.println(withdraw);
int money3=sScan.nextInt();
if(withdraw>money2){
System.out.print("Please enter Valid Amout of Money : ");
withdraw=in.nextInt();
p.println(withdraw);
money3=sScan.nextInt();
}
else
//currentBal= user.withdraw(withdraw);
System.out.println("Your Current Balance : "+money3);
//p.println(currentBal);
}
break;
case 3: // check balance
p.println("get balance");
int mula1 = sScan.nextInt();
System.out.println("Your Current Balance : "+mula1);
//p.println(user.Acc_Balance);
break;
case 0:
quit = true;
break;
default:
System.out.println("Invalid Choice.");
break;
}
System.out.println("\n");
} while (!quit);
System.out.println("Thank you for visiting UNCC Banking");
}
catch(Exception e){e.printStackTrace();}
}
}
}
这是服务器：
import java.io.IOException;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;
class BankAccount {
String name,acc_type;
static int Acc_Balance;
BankAccount(){
}
BankAccount(String n,int b,String a_t) {
name=n;
Acc_Balance=b;
acc_type=a_t;
}
public static void main(String[] args)
{
try{
ServerSocket s1 = new ServerSocket(4);
Socket s2 = s1.accept();
Scanner sc=new Scanner(s2.getInputStream());
PrintStream p = new PrintStream(s2.getOutputStream());
int initialAmount = 0;
System.out.println("Connected");
p.println("connected");
int menuChoice = sc.nextInt();
p.println(menuChoice);
switch(menuChoice)
{
case 1:
int money = sc.nextInt();
//Acc_Balance = money
initialAmount = initialAmount+money;
p.println(initialAmount);
break;
case 2:
String getBalance1 = sc.nextLine();
p.println(initialAmount);
int withD = sc.nextInt();
initialAmount = initialAmount-withD;
p.println(initialAmount);
break;
case 3:
String getBalance = sc.nextLine();
p.println(initialAmount);
break;
default:
break;
}
}
catch(Exception e)
{
e.printStackTrace();
}
}
} // end class