laba10_OOP

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

public class BankingSystem {
    private static HashMap<String, Double> accounts = new HashMap<>();

    public static void main(String[] args) {
        JFrame frame = new JFrame("Banking System");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(800, 600);

        JPanel panel = new JPanel();
        frame.add(panel);
        placeComponents(panel);

        frame.setVisible(true);
    }

    private static void placeComponents(JPanel panel) {
        panel.setLayout(null);

        JLabel accountLabel = new JLabel("Счет:");
        accountLabel.setBounds(10, 20, 80, 25);
        panel.add(accountLabel);

        JTextField accountText = new JTextField(20);
        accountText.setBounds(100, 20, 250, 25);
        panel.add(accountText);

        JLabel amountLabel = new JLabel("Сумма:");
        amountLabel.setBounds(10, 50, 80, 25);
        panel.add(amountLabel);

        JTextField amountText = new JTextField(20);
        amountText.setBounds(100, 50, 250, 25);
        panel.add(amountText);

        JButton openButton = new JButton("Открыть счет");
        openButton.setBounds(10, 80, 200, 25);
        openButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String account = accountText.getText();
                accounts.put(account, 0.0);
                JOptionPane.showMessageDialog(null, "Счет открыт");
            }
        });
        panel.add(openButton);

        JButton depositButton = new JButton("Внесение средств");
        depositButton.setBounds(210, 80, 200, 25);
        depositButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String account = accountText.getText();
                double amount = Double.parseDouble(amountText.getText());
                if (accounts.containsKey(account)) {
                    double balance = accounts.get(account);
                    accounts.put(account, balance + amount);
                    JOptionPane.showMessageDialog(null, "Деньги успешно внесены");
                } else {
                    JOptionPane.showMessageDialog(null, "Счета не существует");
                }
            }
        });
        panel.add(depositButton);

        JButton withdrawButton = new JButton("Снятие средств");
        withdrawButton.setBounds(400, 80, 200, 25);
        withdrawButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String account = accountText.getText();
                double amount = Double.parseDouble(amountText.getText());
                if (accounts.containsKey(account)) {
                    double balance = accounts.get(account);
                    if (balance >= amount) {
                        accounts.put(account, balance - amount);
                        JOptionPane.showMessageDialog(null, "Деньги успешно сняты");
                    } else {
                        JOptionPane.showMessageDialog(null, "Не хватает средств");
                    }
                } else {
                    JOptionPane.showMessageDialog(null, "Счета не существует");
                }
            }
        });
        panel.add(withdrawButton);

        JButton balanceButton = new JButton("Баланас");
        balanceButton.setBounds(600, 80, 100, 25);
        balanceButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String account = accountText.getText();
                if (accounts.containsKey(account)) {
                    double balance = accounts.get(account);
                    JOptionPane.showMessageDialog(null, "Ваш текущий баланс: " + balance);
                } else {
                    JOptionPane.showMessageDialog(null, "Счета не существует");
                }
            }
        });
        panel.add(balanceButton);
    }
}