Need help with a code for an ATM program
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Thread: Need help with a code for an ATM program

  1. #1
    Join Date
    Feb 2012
    Posts
    3

    Lightbulb Need help with a code for an ATM program

    Hi im a beginner at this stuff but i want to be able to understand everything thats going on and not have to keep posting on here lol
    on that note im creating an ATM program in class, pretty simple one that does deposit, withdrawal and views the account balance but i cant seem to get past the configuration for the pin number input help? im using eclipse
    this is what i have so far:


    public static void main(String args[]) {
    {

    int cardnumber;
    int pinNumber;


    char accountType;
    boolean anotherTransaction;

    // ask user for Card
    System.out.println("Please slide your card in the reader below");

    //bring in user card number
    // ask user for pin
    System.out.println("Please enter your PIN number and hit enter");

    String name= JOptionPane.showInputDialog("Please Enter Your pinNumber");

    //check PIN number for validity

    importjavax.swing.JOptionPane

    importjava.util.Scanner;

    int inumber=integer.parseint(pinNumber);

    string pinNumber = Interger.parseint(pinNumber);

    if iNumber >=0001 && iNumber <= 9999;

    System.out.println(iNumber);

  2. #2
    Join Date
    Feb 2012
    Posts
    3

    Re: Need help with a code for an ATM program

    also could someone explain how System.in.read() handles integers ?
    thanks

  3. #3
    Join Date
    Nov 2006
    Location
    Barcelona - Catalonia
    Posts
    362

    Re: Need help with a code for an ATM program

    Hi,

    Please, use code tags to post your code. It makes easier to read

    If you are a beginner, In my opinion you shouldn't start using swing. First, try to learn the Java language.

    To read an integer from console:
    Code:
    Scanner sc = new Scanner(System.in);
    int value = sc.nextInt();
    For instance
    Code:
    import java.io.*;
    import java.util.*;
    
    public class Test {
    	public static void main(String[] args) throws IOException {
    		Scanner sc = new Scanner(System.in);
    		System.out.print("Write an integer: ");
    		int value = sc.nextInt();
    		System.out.println("Value is: " + value);
    	}
    }
    Output:
    Write an integer: 6576
    Value is: 6576
    Using of System.in.read() is quite different, because it takes bytes not numbers. Look at this piece of code:
    Code:
    import java.io.*;
    
    public class Test {
    	public static void main(String[] args) throws IOException {
    		System.out.print("Write an integer: ");
    		int value = System.in.read();
    		System.out.println("");
    		System.out.println("Value is: " + value);
    	}
    }
    Output:
    Write an integer: 4
    Value is: 52
    Another example:
    Write an integer: 245345
    Value is: 50
    That's because System.in.read() only reads one byte. In first example 52 is ASCII representation of 4 in decimal. In second example it only takes the first byte you typed (2) and 50 is the representation of 2.
    Although it's not difficult to deal with streams (System.in is an InputStream), I think you should start reading data with Scanner until you understand how the language works (packages, classes, objects, methods, imports,...)

    Hope this helps!

    Albert.
    Please, correct me. I'm just learning.... and sorry for my english :-)

  4. #4
    Join Date
    Feb 2012
    Posts
    3

    Re: Need help with a code for an ATM program

    it all makes sense now .
    thanks!

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