class colorsUI extends Frame
{
private Button red;
private Button blue;
private Button green;
private Button quit;
private Vector list;
private boolean d;
private colorsButtonListener cbl;
public colorsUI()
{
d = false;
list = new Vector();
cbl = new colorsButtonListener();
setBackground(Color.lightGray);
setSize(320,100);
setTitle("New Frame");
setVisible(true);
setLayout(new FlowLayout(FlowLayout.CENTER, 10, 15));
addWindowListener(new colorsUIListener());
red = new Button("Red");
red.setBackground(Color.red);
red.addActionListener(cbl);
blue = new Button("Blue");
blue.setBackground(Color.blue);
blue.addActionListener(cbl);
green = new Button("Green");
green.setBackground(Color.green);
green.addActionListener(cbl);
quit = new Button("Quit"); ...