|
Lecture
5B |
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| Colors |
Colors are defined by the class
java.awt.Color
RGB, with an alpha transparency factor, is the default colorspace.
Specify a color, for example, in one of the constructors with either int 0-255, or float 0.0-1.0:
Color red = new Color(
0xFF,0,0); // R,G,B
Color blue = new Color(0.0,0.0,1.0);// R,G,B
For convenience, several colors are available as Class constants, e.g. Color.blue,Color.white, etc.
To set the current drawing color in the graphics context:
g.setColor(Color
c);//g =
Graphics object
The
background and foreground colors of components, e.g. a panel, can be set
with setBackground(Color
c); Similarly,
"getter" methods are paired with these methods to obtain the
colors:
setForeground(Color c);
Color c = g.getColor();//g = Graphics object
//
In an applet or other Component object:
Color
bg = getBackground();
Color fg = getForeground();
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