import java.awt.Container;
import java.awt.Dimension;
import java.awt.FlowLayout;
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;

/**
 * An example to demonstrate race conditions.  One thread deposits $1000 in $10 increments while
 * a second thread withdraws $1000 in $10 increments.  In the end, the balance should be the same
 * as at the beginning - $1000. With race conditions, the ending result can be different.
 */
public class BankDemo implements AccountListener {
	// The label where the balance is displayed.
	private JLabel balanceLabel;
	
	private Account account;
	
	public BankDemo() {
		JFrame frame = new JFrame();
		Container contentPane = frame.getContentPane();
		contentPane.setLayout (new FlowLayout());
		JPanel counter1Panel = new JPanel();
		balanceLabel = new JLabel("");
		balanceLabel.setMinimumSize(new Dimension(50, 15));
		counter1Panel.add(balanceLabel);
		
		JButton runButton = new JButton("Run again");
		runButton.addActionListener(new ActionListener() {

			public void actionPerformed(ActionEvent arg0) {
				init();
			}
			
		});
		counter1Panel.add(runButton);

		contentPane.add(counter1Panel);
		
		frame.setSize(200, 200);
		frame.setVisible(true);
		
		init();
		
	}

	/**
	 * 
	 */
	private void init() {
		account = new Account();
		account.addListener(this);
		
		// Create first thread
		Withdrawer r = new Withdrawer(account);
		final Thread t = new Thread(r);
		
		// Create second thread
		Depositer r2 = new Depositer(account);
		final Thread t2 = new Thread(r2);
		
		t.start();
		t2.start();
	}
	
	public void balanceChanged(int newBalance) {
		System.out.println(newBalance);
		balanceLabel.setText("" + newBalance);
	}
	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		BankDemo bank = new BankDemo();
	}

}