import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.FlowLayout;
class Program01 extends JFrame implements ActionListener {
	JButton okButton = new JButton("Ok");
	JButton cancelButton = new JButton("Mégsem");
	String OK_COMMAND = "ok";
	String CANCEL_COMMAND = "cancel";
	Program01() {
		okButton.addActionListener(this);
		okButton.setActionCommand(OK_COMMAND);
		
		cancelButton.addActionListener(this);
		cancelButton.setActionCommand(CANCEL_COMMAND);
		
		
		add(okButton);
		add(cancelButton);
		setLayout(new FlowLayout());
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setSize(400, 300);
		setVisible(true);
	}
	public static void main(String args[]) {
		new Program01();
	}
	public void actionPerformed(ActionEvent e){
		if(e.getActionCommand().equals(OK_COMMAND)){
			setTitle("Ok");
		}else if(e.getActionCommand().equals(CANCEL_COMMAND)){
			setTitle("Nem jó");
		}
	}
}