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Thread: Extensive help with banking simulator

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    Default Extensive help with banking simulator

    Hi community! I'm new here, and not native English, so forgive any mess in language.

    I've got an assignment where I'm supposed to write a banking simulator, i.e a program where you manage customers and accounts. It is a quite extensive program using multiple classes and neither the lessons nor the course literature provide me with the information I need. ArrayList is compulsory to use.

    It's hard to explain the entire assignment in text, so I would be very happy if a helpful soul could add me on Skype. Not necessary to make a call but it's easier to discuss there where I can show my screen and such in real-time. If you're a troll, I'll block you, do mind. Send me a PM here and I'll send my Skype nickname. (If you happen to be Swedish and/or use Eclipse, it would be awesome)

    Thanks in advance.


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    Super Moderator Norm's Avatar
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    Default Re: Extensive help with banking simulator

    Do you have any specific questions about your assignment?
    Please post your code and any questions about problems you are having.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Extensive help with banking simulator

    It's a huge bunch of questions, I really don't know where to start...I'll try with something.

    This is the customer class. It is my first attempt of doing class with a constructor, so I really don't have any idea of what I'm doing... Down at the get-method, I get an error stating "Cannot make a static reference to the non-static field pNr". Why is that? (Btw, pNr stands for "person-number", it's birth date + four digits, like mine is 940430-4322. It's a Swedish thing.)

    public class Customer {
     
    	private static String name;
    	private long pNr;
     
    	public Customer (String n, long p){
    		name = n;
    		pNr = p;
    	}
     
    	public static void setName(String n){
    		name = n;	
    	}
     
    	public void setPNr(long p){
    		pNr = p;
    	}
     
    	public static String get(){
    	String namePNr = (name+"\t"+pNr);		
    		return namePNr;
    	}
    }
    Last edited by Minilena; February 3rd, 2013 at 01:42 PM. Reason: Looking like code!

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    Super Moderator Norm's Avatar
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    Default Re: Extensive help with banking simulator

    Cannot make a static reference to the non-static field
    All the variables and methods in the class should not be static. Remove the static.
    static is used when there will only be one variable that will be shared by all instances.
    non static variables only exist in an instance of the class and can not be used by static methods.

    Please edit your post and wrap your code with
    [code=java]
    <YOUR CODE HERE>
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Extensive help with banking simulator

    Without the static, I get an error message in the calling method. "Cannot make a static reference to the non-static method get() from the type Customer"
    Calling method looks like this:
    private String getCustomer(){
    		String name = Customer.get();
    		return name;
    	}

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    Default Re: Extensive help with banking simulator

    Customer.get();
    Instead of using the name of a class: Customer, use a reference to an instance of the Customer class.

    I'm assuming Customer is a class and that get() is a method in the Customer class.

    You should not be using static for anything. The one exception is the main() method.

    Read about static here:
    http://docs.oracle.com/javase/tutori...classvars.html
    If you don't understand my answer, don't ignore it, ask a question.

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