ATM program

[edward grace]

ok so i have to create an atm program. the program allows for input of a pin and then searches a raf in the first screen, it then moves onto a second menu where the option to withdrawal, check balance, or make a quick withdrawal comes up, and from there either goes to another screen and exits and so on, my problem is i can not figure out how to get the account number into my other classes and because java does not have global variable i can not figure it out, any help is appreciated, and for now my code looks bad but i was planning to clean it up when i was finished with it

 


import java.text.*;  
import javax.swing.*;
import java.awt.event.*;
import java.awt.Container;  
import java.awt.*;  
import java.io.*;


public class ATM extends JFrame
{
  static final int RECLEN =16; 
  static final int BASEREC=1000;
  private JFrame mainFrame;
  private JButton EnterButton;
  private JTextField PersonalID;
  private JLabel EnterPIN;
  
 
 
  public ATM() 
  
  {
    mainFrame = new JFrame("ATM");
    EnterButton = new JButton("Enter");  
    EnterPIN = new JLabel("Please enter your four digit PIN and press enter");
    PersonalID = new JTextField(5);
    

      
    Container c = mainFrame.getContentPane(); 
     
    c.setLayout(new FlowLayout());
    
       
    c.add(EnterPIN);
    c.add(PersonalID);
    c.add(EnterButton);
    
    
      
    EnterButton.setMnemonic('e');
   
    mainFrame.setSize(350,150);
    
    
      
    mainFrame.addWindowListener(new WindowAdapter()
    {
      public void windowClosing(WindowEvent e) {System.exit(0);}
    });
    
      
    EnterButtonHandler ehandler = new EnterButtonHandler(); 
    EnterButton.addActionListener(ehandler);      
 
   

 
    mainFrame.show();
  } 
  
  
  class EnterButtonHandler implements ActionListener
  {
    public void actionPerformed(ActionEvent e) 
        
    {
        String fileName="products.dat";
        String acctstring, amtstring, pricestring;
        int acct;
        int amt;
        int recnum;
        double price;
        long filelen, position, setbytepos;
        
    
        InputStreamReader isr=
            new InputStreamReader(System.in);
        BufferedReader br=
            new BufferedReader(isr);
            
    
    try{
            RandomAccessFile raf =
            new RandomAccessFile(fileName, "rw");
        
        filelen=raf.length(); 
        
        

        
     
      String instring;      
      int invalue;
      
       
      instring=PersonalID.getText(); 
          
     
      invalue= Integer.parseInt(instring)- BASEREC;
            
            position=(invalue-1)*RECLEN;
      
      if (instring.equals("") || position<0 || position>(filelen-1) )
      {
          JOptionPane.showMessageDialog(null, "Invalid please try again",
          "Event Handler Message",JOptionPane.INFORMATION_MESSAGE);
      }
      raf.seek(position);
      acct=raf.readInt();
      setbytepos=raf.getFilePointer();
      amt=raf.readInt();
        
      mainFrame.setVisible(false);
      
      new options();
      
      
    }
    catch(FileNotFoundException a) 
              {
              }
     catch( IOException b)
     {
     }
      
      
    }
  }  
  

  class ExitButtonHandler implements ActionListener
  {
    public void actionPerformed(ActionEvent e)
    {
      System.exit(0);
    }
  }  

  public static void main(String args[])
  throws java.io.IOException
  {
    new ATM(); 
  }

}  
   

thats my atm class which then calls

import java.text.*;  
import javax.swing.*;
import java.awt.event.*;
import java.awt.Container;  
import java.awt.*;  
import java.io.*;

public class options extends JFrame 
{
  static final int RECLEN =16; 
  static final int BASEREC=1000;
  private JFrame mainFrame, mainFrame2, mainFrame3;
  private JButton EnterButton, WithdrawlButton, CheckBalance,WithdrawlTwenty,WithdrawlForty,WithdrawlSixty,WithdrawlEighty, WithdrawlHundred;
  private JTextField PersonalID;
  private JLabel EnterPIN, QuickWithdrawl;
  
 
  
      public  options()
  {
      mainFrame2 = new JFrame("Options");
    WithdrawlButton = new JButton("Withdrawl"); 
    CheckBalance = new JButton("Check Balance");
    WithdrawlTwenty = new JButton("$20");
    WithdrawlForty = new JButton("$40");
    WithdrawlSixty = new JButton("$60");
    WithdrawlEighty = new JButton("$80");
    WithdrawlHundred = new JButton("$100");
    QuickWithdrawl = new JLabel("Please choose an amount for quick withdrawl");
    
    
    Container d = mainFrame2.getContentPane(); 
     
    d.setLayout(new FlowLayout());
    
       
    d.add(WithdrawlButton);
    d.add(CheckBalance);
    d.add(QuickWithdrawl);
    d.add(WithdrawlTwenty);
    d.add(WithdrawlForty);
    d.add(WithdrawlSixty);
       d.add(WithdrawlEighty);
       d.add(WithdrawlHundred);    
           
       WithdrawlButton.setMnemonic('w');
       CheckBalance.setMnemonic('c');
       WithdrawlTwenty.setMnemonic('2');
       WithdrawlForty.setMnemonic('4');
       WithdrawlSixty.setMnemonic('6');
       WithdrawlEighty.setMnemonic('8');
       WithdrawlHundred.setMnemonic('1');
   
    mainFrame2.setSize(300,200);    
   
   
   mainFrame2.addWindowListener(new WindowAdapter()
    {
      public void windowClosing(WindowEvent e) {System.exit(0);}
    });
    
    
   WithdrawlButtonHandler whandler = new WithdrawlButtonHandler(); 
    WithdrawlButton.addActionListener(whandler); 
        
    CheckBalanceHandler chandler = new CheckBalanceHandler(); 
    CheckBalance.addActionListener(chandler);
    
       WithdrawlTwentyHandler thandler = new WithdrawlTwentyHandler(); 
    WithdrawlTwenty.addActionListener(thandler); 
        
       WithdrawlFortyHandler fhandler = new WithdrawlFortyHandler(); 
   WithdrawlForty.addActionListener(fhandler);
     
       WithdrawlSixtyHandler shandler = new WithdrawlSixtyHandler(); 
    WithdrawlSixty.addActionListener(shandler);
     
       WithdrawlEightyHandler ehandler = new WithdrawlEightyHandler(); 
    WithdrawlEighty.addActionListener(ehandler); 
        
       WithdrawlHundredHandler hhandler = new WithdrawlHundredHandler(); 
    WithdrawlHundred.addActionListener(hhandler); 
   
   
    mainFrame2.show();
      
      
  }

  class WithdrawlButtonHandler implements ActionListener
  {
    public void actionPerformed(ActionEvent e) 
        
    {
    
        new withdrawl();
        mainFrame2.dispose();
      
      
    }
  }  
  
  class CheckBalanceHandler implements ActionListener
  {
    public void actionPerformed(ActionEvent e) 
        
    {
    
         JOptionPane.showMessageDialog(null, "Your acount has: $" ,
         "Event Handler Message",JOptionPane.INFORMATION_MESSAGE);
      
      
    }
  }  
  
  class WithdrawlTwentyHandler implements ActionListener
  {
    public void actionPerformed(ActionEvent e) 
        
    {
         JOptionPane.showMessageDialog(null, "20" ,
         "Event Handler Message",JOptionPane.INFORMATION_MESSAGE);
      mainFrame2.dispose();
      new Thankyou();
      
    }
  }  
  
  class WithdrawlFortyHandler implements ActionListener
  {
    public void actionPerformed(ActionEvent e) 
        
    {
        JOptionPane.showMessageDialog(null, "40" ,
         "Event Handler Message",JOptionPane.INFORMATION_MESSAGE);

      
      
    }
  }  
  
  class WithdrawlSixtyHandler implements ActionListener
  {
    public void actionPerformed(ActionEvent e) 
        
    {
        JOptionPane.showMessageDialog(null, "60",
         "Event Handler Message",JOptionPane.INFORMATION_MESSAGE);
        
        

      
      
    }
  }  
  
  class WithdrawlEightyHandler implements ActionListener
  {
    public void actionPerformed(ActionEvent e) 
        
    {
    JOptionPane.showMessageDialog(null, "80" ,
         "Event Handler Message",JOptionPane.INFORMATION_MESSAGE);

      
      
    }
  }  
  
  class WithdrawlHundredHandler implements ActionListener
  {
    public void actionPerformed(ActionEvent e) 
        
    {
    JOptionPane.showMessageDialog(null, "100" ,
         "Event Handler Message",JOptionPane.INFORMATION_MESSAGE);

      
      
    }
  }  
  
  
  
  
  
  

  

}   

 

and that class is part of my problem i can not figure out how to get the account information from the first class into this class so that i can get the money info


any help is appreciated and thanks in advanced

[Gregg Bolinger]

You'll want to pass your variable into your options class. This can be done a couple of ways. I'm showing a simplified version that you can apply to your code:

new Options(accountNumber);

or

final Options options = new Options();
options.setAccountNumber(accountNumber);

Your Options class would need an overloaded constructor for the first example or a setter in the second example.

[David Newton]

On a vaguely-related note, it's "withdrawal". "Withdrawl" is how we speak here on the ranch.