import java.awt.*;
import java.awt.event.*;

public class MeinFenster
	implements ActionListener
{
	public static void main(String[] bla)
	{
		new MeinFenster();
	}
	
	Button b1, b2, b3;
	
	public MeinFenster()
	{
		Frame f = new Frame("Mein 1. Fenster");
		Panel p = new Panel();
		b1 = new Button("Knopf A");
		b2 = new Button("Knopf B");
		b3 = new Button("Knopf C");
		Button b4 = new Button("Knopf D");
		Button b5 = new Button("Knopf E");
		Button b6 = new Button("Knopf F");

		f.setLayout(new BorderLayout());
		p.add(b1); p.add(b2);
		p.setBackground(Color.RED);
		f.add(p, BorderLayout.NORTH);
		f.add(b3, BorderLayout.CENTER);
		
		b2.addActionListener( this ); // Polymorhphism in actions
		b3.addActionListener( this );
		
		Panel p2 = new Panel(); p2.add(b4); p2.add(b5); p2.add(b6);
		f.add(p2, BorderLayout.SOUTH);
		
		// Methode 2: ActionListener als eigene Klasse
		b5.addActionListener(new DerListener());
		
		// Methode 3 : Inner classes
		b4.addActionListener(new Listener4());
		b6.addActionListener(new Listener6());
		
		// Methode 4: Anonymous inner class - nur für Schwindelfreie!
		// (Erklärt euch der Florian ;-)
		
		f.pack();
		f.setVisible(true);
	}
	
	public void actionPerformed(ActionEvent ae)
	{
		// Methode 1: Button-Ref als Member, und Event-Source vegleichen
		Object o = ae.getSource();
		if (o == b1)
			System.out.println("Something has happened at B ONE!!!");
		else if (o == b2)
			System.out.println("Something has happened at B TWO!!!");
		else	
			System.out.println("Something else has happened !!!");
	}

	public class Listener4 implements ActionListener
	{
		public void actionPerformed(ActionEvent ae)
		{
			System.out.println("Something has happened at the 4 Button!");
			
			// Der Witz: Inner classes haben Zugriff auf Members der
			// outer class !!!!
			b1.setBackground(Color.BLACK);
		}
	}
	
	public class Listener6 implements ActionListener
	{
		public void actionPerformed(ActionEvent ae)
		{
			System.out.println("Something has happened at the 666 Button!");
		}
	}
}