[ Belajar Java ] - Membuat Button

import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

class MembuatButton extends JFrame implements ActionListener
{

    public static void main(String args[])
    {

      new MembuatButton();

    }

    public MembuatButton()
    {

      super(”Belajar Membuat Button”);
      JButton exit = new JButton(”Exit”);
      exit.addActionListener(this);
      add(exit);
      setSize(300,200);
      setLocation(250,150);
      setVisible(true);

    }

    public void actionPerformed(ActionEvent e)
    {

      String selection = e.getActionCommand();
      if (selection.equals(”EXIT”))
      {

       System.exit(0);

      }
    }

}