BankingApplicationGUI.java

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

// Main class for the bancjing application GUI
public class BankingApplicationGUI{
 public static void main(String[] args){
 // Create a BankAccountGUI object and show the menu
 BankAccount bank1 = new BankAccount("Cris", "0001");
 bank1.showMenu();
 }
}

// GUI representing a bank account with GUI components
class BankAccount{
 // Variables
 int balance;
 int previousTransaction;
 String customerName;
 String customerId;

 // GUI components
 JFrame frame; // Maine frame of the application
 JLabel balanceLabel; // Label to display the balance
 JTextField amountField; // Text field to input the amount
 JTextArea outputArea; // Text area to display messages

 // Set customer name and ID
 BankAccount(String cname, String cid){
 customerName = cname; 
 customerId = cid;
 }

 // Method to deposit the amount into the account
 void deposit(int amount){
 if (amount !=0){ // check if the amount is not zero
 balance = balance + amount; // add the amount to the balance
 previousTransaction = amount; 
 updateBalance(); 
 }
 }
 
 // Method to withdraw an amount from the account
 void withdraw(int amount){
 if (amount != 0){ // check if the amount is not zero
 balance = balance - amount; // subtract the amount from the balance
 previousTransaction = -amount;
 updateBalance();
 }
 }

 // Method to display the previous transaction
 void getPreviousTransaction(){
 if (previousTransaction > 0){ // check if previous trans. was a deposit
 System.out.println("Deposited: "+ previousTransaction);
 } else if(previousTransaction < 0) { // check if privious trans. was a withdraw
 System.out.println("Withdrawn: "+ Math.abs(previousTransaction)); 
 } else { // the previous trans. was 0$ or this is a new account
 System.out.println("No transaction is occured!");
 }
 }

 // method to update the balance label
 void updateBalance(){
 balanceLabel.setText("Balance: $" + balance);
 }

 // Method to create and display the GUI
 void showMenu(){
 frame = new JFrame("Banking Application"); // create the main frame
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // set the default close operation
 frame.setSize(400, 400); // set the size of the frame

 Container container = frame.getContentPane(); // get the content pane of the frame
 container.setLayout(new BorderLayout()); // set the layout to BorderLayout

 // Top panel with customer information and balance
 JPanel topPanel = new JPanel(); // panel for top section
 topPanel.setLayout(new FlowLayout()); // set layout to FlowLayout
 JLabel welcomLabel = new JLabel("Welcome" + customerName); // Create a label with the customer's name
 JLabel idLabel = new JLabel("Your ID: " + customerId); // ...
 balanceLabel = new JLabel(); // to display ...
 
 // ... add
 topPanel.add(welcomLabel);
 topPanel.add(idLabel);
 topPanel.add(balanceLabel);
 container.add(topPanel, BorderLayout.NORTH);

 // Center panel with action buttons
 JPanel centerPanel = new JPanel();
 centerPanel.setLayout(new GridLayout(5, 1));

 // Create acyion buttons
 JButton checkBalanceButton = new JButton("Check Balance");
 JButton depositButton = new JButton("Deposit");
 JButton withdrawButton = new JButton("Withdraw");
 JButton previousTransactionButton = new JButton("Previouse Transaction");
 JButton exitButton = new JButton("Exit");

 // Add buttons to the center panel
 centerPanel.add(checkBalanceButton);
 centerPanel.add(depositButton);
 centerPanel.add(withdrawButton);
 centerPanel.add(previousTransactionButton);
 centerPanel.add(exitButton);

 //... add the center panel to the center section of the container
 container.add(centerPanel, BorderLayout.CENTER);

 // Bottom panel with amount input and output area
 JPanel bottomPanel = new JPanel(); // create a panel to the bottom section
 bottomPanel.setLayout(new FlowLayout()); // set the layout to FlowLayout
 JLabel amountLabel = new JLabel("Enter the amount: ");
 amountField = new JTextField(10); // text field for entering of amount
 outputArea = new JTextArea(5, 30); // text area to display message
 outputArea.setEditable(false); // make text area - non-editable

 // ... set label, field at/and bottom panel
 bottomPanel.add(amountLabel);
 bottomPanel.add(amountField);
 bottomPanel.add(new JScrollPane(outputArea));
 container.add(bottomPanel, BorderLayout.SOUTH);

 // Add action listeners to the buttons

 // Action listener for the check balance button
 checkBalanceButton.addActionListener(new ActionListener() {
 @Override
 public void actionPerformed(ActionEvent e){
 updateBalance();
 }
 });

 // Action listener for the deposit button
 depositButton.addActionListener(new ActionListener(){
 @Override
 public void actionPerformed(ActionEvent e){
 int amount = Integer.parseInt(amountField.getText()); // get the amount from the text field
 deposit(amount); // call the deposit method
 outputArea.setText("Deposited: $" + amount); // display the deposited amount
 }
 });

 // Action listener for the previous withdraw button
 withdrawButton.addActionListener(new ActionListener(){
 @Override
 public void actionPerformed(ActionEvent e){
 int amount = Integer.parseInt(amountField.getText()); // get the amount from the text field
 withdraw(amount); // call the withdraw method
 outputArea.setText("Withdrawn: $" + amount); // display the withdrawn amount
 }
 });
 
 // Action listener for the previous transaction button
 previousTransactionButton.addActionListener(new ActionListener() {
 @Override
 public void actionPerformed(ActionEvent e){
 getPreviousTransaction();
 }
 });

 // Action listener for exit button
 exitButton.addActionListener(new ActionListener() {
 @Override
 public void actionPerformed(ActionEvent e){
 frame.dispose();
 }
 });

 // Make the frame visible
 frame.setVisible(true);
 }
}