import javax.swing.*; import java.awt.*; import java.awt.event.*; /** This is a ButtonDemo Application */ public class ButtonDemo1 extends JFrame implements ActionListener { JButton b1; /** Construct a ButtonDemo1 */ public ButtonDemo1() { super("Linux Journal Button Demo"); add(b1 = new JButton("A button")); b1.addActionListener(this); pack(); } public void actionPerformed(ActionEvent event) { System.exit(0); } public static void main(String av[]) { new ButtonDemo1().setVisible(true); } }