CodeAlpha_StockTradingPlatformGUI

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.util.*;
import javax.swing.*;

class Stock {
    String symbol;
    double price;

    public Stock(String symbol, double price) {
        this.symbol = symbol;
        this.price = price;
    }

    @Override
    public String toString() {
        return symbol + ": $" + price;
    }
}

class Transaction {
    String symbol;
    int quantity;
    double price;
    String type;

    public Transaction(String symbol, int quantity, double price, String type) {
        this.symbol = symbol;
        this.quantity = quantity;
        this.price = price;
        this.type = type;
    }

    @Override
    public String toString() {
        return type + " " + quantity + " shares of " + symbol + " at $" + price;
    }
}

class User {
    Map<String, Integer> portfolio = new HashMap<>();
    List<Transaction> history = new ArrayList<>();
    double balance = 10000;

    public void buyStock(Stock stock, int quantity) {
        double cost = stock.price * quantity;
        if (balance >= cost) {
            portfolio.put(stock.symbol, portfolio.getOrDefault(stock.symbol, 0) + quantity);
            history.add(new Transaction(stock.symbol, quantity, stock.price, "BUY"));
            balance -= cost;
        } else {
            JOptionPane.showMessageDialog(null, "Not enough balance.");
        }
    }

    public void sellStock(Stock stock, int quantity) {
        int owned = portfolio.getOrDefault(stock.symbol, 0);
        if (owned >= quantity) {
            portfolio.put(stock.symbol, owned - quantity);
            history.add(new Transaction(stock.symbol, quantity, stock.price, "SELL"));
            balance += stock.price * quantity;
        } else {
            JOptionPane.showMessageDialog(null, "Not enough shares.");
        }
    }

    public String getPortfolio() {
        StringBuilder sb = new StringBuilder("Portfolio:\n");
        for (String sym : portfolio.keySet()) {
            sb.append(sym).append(": ").append(portfolio.get(sym)).append(" shares\n");
        }
        sb.append("Balance: $").append(balance);
        return sb.toString();
    }

    public String getHistory() {
        StringBuilder sb = new StringBuilder("Transaction History:\n");
        for (Transaction t : history) {
            sb.append(t).append("\n");
        }
        return sb.toString();
    }

    public void setHistory(List<Transaction> history) {
        this.history = history;
    }
}

public class StockTradingPlatformGUI {
    static Map<String, Stock> market = new HashMap<>();
    static User user = new User();
    static JTextArea displayArea = new JTextArea(15, 30);

    public static void main(String[] args) {
        loadMarket();

        JFrame frame = new JFrame("Stock Trading Platform");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(0, 1));

        JButton viewMarketBtn = new JButton("View Market");
        JButton buyBtn = new JButton("Buy Stock");
        JButton sellBtn = new JButton("Sell Stock");
        JButton portfolioBtn = new JButton("View Portfolio");
        JButton historyBtn = new JButton("View History");

        displayArea.setEditable(false);
        JScrollPane scroll = new JScrollPane(displayArea);

        viewMarketBtn.addActionListener(e -> {
            displayArea.setText("--- Market ---\n");
            for (Stock s : market.values()) {
                displayArea.append(s + "\n");
            }
        });

        buyBtn.addActionListener(e -> {
            String sym = JOptionPane.showInputDialog("Enter Stock Symbol to Buy:").toUpperCase();
            String qtyStr = JOptionPane.showInputDialog("Enter Quantity:");
            int qty = Integer.parseInt(qtyStr);
            Stock s = market.get(sym);
            if (s != null) {
                user.buyStock(s, qty);
                JOptionPane.showMessageDialog(null, "Bought " + qty + " shares of " + sym);
            } else {
                JOptionPane.showMessageDialog(null, "Stock not found.");
            }
        });

        sellBtn.addActionListener(e -> {
            String sym = JOptionPane.showInputDialog("Enter Stock Symbol to Sell:").toUpperCase();
            String qtyStr = JOptionPane.showInputDialog("Enter Quantity:");
            int qty = Integer.parseInt(qtyStr);
            Stock s = market.get(sym);
            if (s != null) {
                user.sellStock(s, qty);
                JOptionPane.showMessageDialog(null, "Sold " + qty + " shares of " + sym);
            } else {
                JOptionPane.showMessageDialog(null, "Stock not found.");
            }
        });

        portfolioBtn.addActionListener(e -> displayArea.setText(user.getPortfolio()));
        historyBtn.addActionListener(e -> displayArea.setText(user.getHistory()));

        panel.add(viewMarketBtn);
        panel.add(buyBtn);
        panel.add(sellBtn);
        panel.add(portfolioBtn);
        panel.add(historyBtn);

        frame.getContentPane().add(BorderLayout.CENTER, scroll);
        frame.getContentPane().add(BorderLayout.EAST, panel);
        frame.pack();
        frame.setVisible(true);
    }

    static void loadMarket() {
        market.put("AAPL", new Stock("AAPL", 190.0));
        market.put("GOOG", new Stock("GOOG", 2800.0));
        market.put("MSFT", new Stock("MSFT", 330.0));
        market.put("TSLA", new Stock("TSLA", 720.0));
    }
}