import javax.swing.JFrame;
import javax.swing.JButton;
class Program01 extends JFrame {
 
    JButton closeButton = new JButton("Kilépés");
 
	public Program01() {
		this.closeButton.setBounds(100, 100, 100, 30);
		this.closeButton.addActionListener(event -> closeButtonAction());
 
		this.add(closeButton);
		this.setLayout(null);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setSize(400, 300);		
		this.setVisible(true);		
	}
	public void closeButtonAction() {
		System.exit(0);
	}
	public static void main(String[] args) {
		new Program01();	
	}
}