import javax.swing.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class BankAccountGUI {
    private JTextField addField;
    private JButton addButton;
    private JTabbedPane tabbedPane1;
    private JPanel panel1;
    private JTextField balanceField;
    private JTextField removeField;
    private JButton checkBalanceButton;
    private JButton removeButton;
    double balance = 0;


    public BankAccountGUI() {
        addButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                balance += Double.valueOf(addField.getText()).doubleValue();
            }
        });
        checkBalanceButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                balanceField.setText(Double.toString(balance));
            }
        });
        removeButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                balance -= Double.valueOf(removeField.getText()).doubleValue();
            }
        });
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("BankAccountGUI");
        frame.setContentPane(new BankAccountGUI().panel1);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setVisible(true);
    }
}