What do I need to do to make a button make a window disappear?

Question

public class MyWindow extends JFrame implements ActionListener
     JButton button;
     public MyWindow()
          button = new JButton("Close this window/JFrame");
          button.setVisible(true);
button.addActionListener(this);
getContentPane().add(button);
public void actionPerformed(ActionEvent evt)
//Code that runs when the button is pushed
// what do I need to call to close this window?
     public static void main (String[] ar)
MyWindow m = new MyWindow();
m.setSize(new Dimension(300, 100));
          m.setVisible(true);
I'm tired and have been coding for at least 4 hours, please help a guy out.

Answer 1

While many people seem to find it somehow glorious to code until very late, it would be more productive if they'd take a rest and continue later, as you've just shown.