DSCN5277

4.

POLITECHNIKA RZESZO WSKA - Wydział EtekBctocmfc . :rfem«y»:

ActionListener - obsługa zdarzeń

I import j ava.awt.event.*;

1

public class ButtonEvent extends JFrame implements AotionLi starter ( ButtonEvent() (

i JButton("ChangeColor"); aner(this);

public Void actionPerformed(ActionEvent o) { if (panel.getBackground() == Color.red)

panel.setBackground(Colcr.green); else if (panel.getBackgroundO =*= Color.green) panel.setBackground(Color.blue);

else

panel.setBackground(Color.red);