从另一个方法调用方法？

Question

I'm semi-new to programming and I am having trouble calling a method inside another method. I'm not completely done writing my code but was checking to make sure it is working as intended as I go. So there are other errors in the code but I'm assuming it shouldn't matter for the part I have below.

JOptionPane.showInputDialog(null, "Press n to add a new account\n Press d to add a deposit\n "
            + "Press w to withdraw from an account\n Or press x to exit");        
    String choice = input.next();        
    if(choice.equals("n")){
            Bank n = new Bank();
            n.newAccount();
    }

public void newAccount() {
    JOptionPane.showInputDialog(null, "Enter the account number");

So my problem is that it prompts me to enter n/d/w/x as it should in the first part, but then nothing else happens when I enter "n". Where as I thought after entering n it would prompt me for the account number.

FYI: the name of the class is Bank. Also the code is a little lengthy so I only pasted a portion of it (there are more if statements for entering d/w/x and there are other methods to the program as well.

Answer 1

You just need to throw this in a debugger and it will be very clear.

One thing to check is to make sure is the input you are getting is really 'n'.

Perhaps put a print statement right after variable choice is initialized.

System.out.println(String.format("Choice '%s'", choice));

Answer 2

为什么不通过打印choice值自己尝试一下，或者如果您正在使用任何IDE，然后以调试模式启动服务器，然后通过在代码中应用调试点来检查要检查的内容，那么为什么不尝试。

Answer 3

You need to set the "choice" variable to the return from the input dialog, as it returns the user's input as a string, like so:

String choice = (String)JOptionPane.showInputDialog(null, "Press n to add a new account\n Press d to add a deposit\n "
            + "Press w to withdraw from an account\n Or press x to exit"); 

Check out this tutorial for more info: How to Make Dialogs