Sams Teach Yourself Java™ in 24 Hours (Covering Java 7 and Android)

ptg7068951

Change Listeners 225

16: setVisible(true);

17:

18: canvas= new ColorPanel();

19: red = new JSlider(0, 255, 255);

20: green= new JSlider(0, 255, 0);

21: blue= new JSlider(0, 255, 0);

22:

23: red.setMajorTickSpacing(50);

24: red.setMinorTickSpacing(10);

25: red.setPaintTicks(true);

26: red.setPaintLabels(true);

27: red.addChangeListener(this);

28:

29: green.setMajorTickSpacing(50);

30: green.setMinorTickSpacing(10);

31: green.setPaintTicks(true);

32: green.setPaintLabels(true);

33: green.addChangeListener(this);

34:

35: blue.setMajorTickSpacing(50);

36: blue.setMinorTickSpacing(10);

37: blue.setPaintTicks(true);

38: blue.setPaintLabels(true);

39: blue.addChangeListener(this);

40:

41: JLabel redLabel = new JLabel(“Red:“);

42: JLabel greenLabel = new JLabel(“Green:“);

43: JLabel blueLabel = newJLabel(“Blue:“);

44: GridLayout grid = new GridLayout(4, 1);

45: FlowLayout right = new FlowLayout(FlowLayout.RIGHT);

46: setLayout(grid);

47:

48: JPanel redPanel = new JPanel();

49: redPanel.setLayout(right);

50: redPanel.add(redLabel);

51: redPanel.add(red);

52: add(redPanel);

53:

54: JPanel greenPanel = new JPanel();

55: greenPanel.setLayout(right);

56: greenPanel.add(greenLabel);

57: greenPanel.add(green);

58: add(greenPanel);

59:

60: JPanel bluePanel = new JPanel();

61: bluePanel.setLayout(right);

62: bluePanel.add(blueLabel);

63: bluePanel.add(blue);

64: add(bluePanel);

65: add(canvas);

66:

LISTING 16.2 Continued