ojo

package bank;

/**
 *
 * @author elev
 */
public class Banksystem {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        Account a1 = new Account("Eva", 4500);
        Account a2 = new Account("Ture", 0);
        Account a3 = new Account("Stina", 67000);

        Bank banken =new Bank();

        banken.addAccount(a1);
        banken.addAccount(a2);
        banken.addAccount(a3);
        System.out.println(banken.findAccount(1002).holder());



        Gui gui=new Gui(banken);
    }

}


package bank;

/**
 *
 * @author elev
 */
public class Account {
    private double balance;
    private int accountNo;
    private String holder;
    private static int counter = 1000;

    public Account(String holder, double initBalance){
        this.holder = holder;
        this.balance = initBalance;
        accountNo = ++counter;
    }

    public void deposit(double amount){
        this.balance += amount;
    }

    public double balance(){
    return balance;}
    public void withdraw( double amount){
        if(balance >= amount){
        this.balance -= amount;
        }
    }
    public int accountNo(){
        return accountNo;
    }
    public String holder(){
        return holder;
    }
    public String toString(){
        return "name: " + holder + "\n " + "accountNo:" + accountNo +  "\n " + "balance: " + balance +"\n";
    }

}



package bank;

/**
 *
 * @author elev
 */
import java.util.*;
public class Bank {
    private ArrayList accounts = new ArrayList();

    public void addAccount (Account a){
        accounts.add(a);
    }
    public  Account findAccount(int accountNo){
        for(int i = 0; i < accounts.size(); i++){
                Account temp = (Account)accounts.get(i);
                if(temp.accountNo()== accountNo){
                    return temp;
                }
        }
        return null;
    }

}


package bank;

/**
 *
 * @author elev
 */
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Gui {
    private JFrame frame = new JFrame("Crime Bank");
    private JPanel background, centerPanel,southPanel,menuBar;
    private JLabel l_accountNo,l_name,l_deposit,l_withdraw,l_balance;
    private JTextField tf_accountNo, tf_name, tf_deposit,tf_withdraw,tf_balance;
    private JButton b_find,b_deposit,b_withdraw,b_clear,b_create;
    private JMenuBar baren;
    private JMenu menu;
    private JMenuItem i_item,i_accountNo,i_deposit,i_withdraw,i_clear,i_find;
    private Account findAcc;
     private Bank banken;


public Gui(Bank b){
    banken = b;
    //baren = new JMenuBar();
   // menu = new JMenu("file");
    //i_item = new JMenuItem("close");
   // i_clear = new JMenuItem("clear");
   // i_find = new JMenuItem("find");
    //menu.add(i_clear);
    //baren.add(menu);
    //menu.add(i_item);
    //menu.add(i_find);
    //this.frame.setJMenuBar(baren);
        background = new JPanel();
        background.setLayout(new BorderLayout());
        centerPanel = new JPanel();
              background.setBorder(BorderFactory.createLineBorder(Color.RED,9, false));

        centerPanel.setLayout((new GridLayout(5,2)));
        southPanel = new JPanel();
        southPanel.setLayout((new GridLayout(3,2)));
        l_accountNo = new JLabel("accountNo: ");
        l_name = new JLabel("name:");
        l_deposit = new JLabel ("deposit:");
        l_withdraw = new JLabel("withdraw:");
        l_balance = new JLabel("balance:");
        b_find = new JButton("FIND");
        b_deposit = new JButton("Deposit");
        b_withdraw = new JButton("Witdraw");
        b_clear = new JButton("CLEAR");
        b_create = new JButton("CREATE");
        southPanel.add(b_deposit);
        southPanel.add(b_find);
        southPanel.add(b_withdraw);
        southPanel.add(b_clear);
        southPanel.add(b_create);


        tf_accountNo= new JTextField(12);
        tf_name  = new JTextField(12);
        tf_deposit= new JTextField(12);
        tf_withdraw= new JTextField(12);
        tf_balance= new JTextField(12);
           centerPanel.add(l_accountNo);
           centerPanel.add(tf_accountNo);
           centerPanel.add(l_name);
           centerPanel.add(tf_name);
           centerPanel.add(l_balance);
           centerPanel.add(tf_balance);
           centerPanel.add(l_deposit);
           centerPanel.add(tf_deposit);
           centerPanel.add(l_withdraw);
           centerPanel.add(tf_withdraw);
           background.add(centerPanel, BorderLayout.CENTER);
           background.add(southPanel, BorderLayout.SOUTH);
           frame.setContentPane(background);
           frame.pack();
           frame.setVisible(true);
           ClearHandler cl = new ClearHandler();
           FH fh = new FH();

           this.b_clear.addActionListener(cl);
           this.i_clear.addActionListener(cl);
           this.b_withdraw.addActionListener(new WH());
           this.b_deposit.addActionListener(new DH());
           this.b_find.addActionListener(fh);
           this.i_find.addActionListener(fh);
           this.b_create.addActionListener(new Create());
           this.banken = banken;

}
private class ClearHandler implements ActionListener{
public void actionPerformed(ActionEvent ae){
   tf_accountNo.setText("");
   tf_name.setText("");
   tf_deposit.setText("");
   tf_withdraw.setText("");
   tf_balance.setText("");

}
    }
//private class DepositHandler implements ActionListener{
    //public void actionePerformed(ActionEvent ae){
      //  double amount = Double.parseDouble(tf_deposit.getText());
        //foundAcc.deposit(amount);
        //tf_balance.setText(""+ foundAcc.balance)
          //  System.out.println("deposit");
    //}
//}

private class WH implements ActionListener{
    public void actionPerformed(ActionEvent ae){
        System.out.println("");
        String sWithdraw = tf_withdraw.getText();
        double amount = Double.parseDouble(sWithdraw);
        findAcc.withdraw(amount);
        tf_balance.setText("" + findAcc.balance());

    }
}
private class DH implements ActionListener{
    public void actionPerformed(ActionEvent ae){
         System.out.println("");
         String sDeposit = tf_deposit.getText();
         double amount = Double.parseDouble(sDeposit);
         findAcc.deposit(amount);
         tf_balance.setText("" + findAcc.balance());
         System.out.println("Deposit" + amount);
    }
   // private class FL implements ActionListener{
     //  public void actionPerformed(ActionEvent ae){
       //    String accNo = tf_accountNo.getText();
         //  foundAcc = banken.findAccount(Integer.parseInt(accNo));
          // String holder = founcAcc.holder();
           //double balance = foundAcc.holder();
          // tf_balance.setText(""+balance);

    //}
}
private class FH implements ActionListener{
    public void actionPerformed(ActionEvent ae){
        System.out.println("");
        String sAccNo = tf_accountNo.getText();
        int accNo = 0;
        try{
         accNo = Integer.parseInt(sAccNo);

        }catch (NumberFormatException nfe){
        JOptionPane.showMessageDialog(frame, "skriv in siffror som kontonummer");

        return;}
        Account findAcc = banken.findAccount(accNo);
        if(findAcc!=null){
             tf_name.setText(findAcc.holder());
             tf_balance.setText(""+findAcc.balance());
        }else JOptionPane.showMessageDialog(frame, "kontot finns inte! ");
    }
}
private class Create implements ActionListener{
    public void actionPerformed(ActionEvent ae){
        System.out.println("Create");
        String holder = tf_name.getText();
        double amount = Double.parseDouble(tf_deposit.getText());
        Account create = new Account(holder, amount);
        tf_accountNo.setText("" + create.accountNo());
        banken.addAccount(create);
        tf_deposit.setText("");
        tf_balance.setText("" + create.balance());

    }