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[java] Colors in Java

Started by gpalin Dec 3, 2002 at 8:56 PM 7 replies 400+ views

Original Post

Dec 3, 2002 at 8:56 PM

How can you use red, green, and blue values to construct a single color? I mean, I''ve seen it before, a long time ago, I don''t remember where. It was where you had, say, values for r, g, and b, and you could call a method or something like that to combine those colors and set it as the current color for Java to use. I hope you understand my question! Grant Palin

johnnyboy

Dec 3, 2002 at 9:07 PM

Basically:

Color c = new Color(255,255,255); // rgb values

gpalin

Dec 3, 2002 at 9:09 PM

And then I could do:

g.setColor(Color.c);

Right?

Grant Palin

Kentaro

Dec 3, 2002 at 9:15 PM

Actually, you''d be creating a Color object, so it''d be g.setColor(c). Color.name is used for default colors...
Example: Color.BLACK, g.setColor(Color.BLACK).

See, the default colors are static fields of the Color class. =)

This isn''''t life in the fast lane, it''''s life in the oncoming traffic.
-- Terry Pratchett

gpalin

Dec 3, 2002 at 9:29 PM

Right, I gotcha. Thanks!!

Grant Palin

gpalin

Dec 4, 2002 at 1:44 PM

Neither of the solutions provided work for me.

M:\Comp132\ColorPicker.java:33: cannot resolve symbol
symbol : constructor Color (int,java.awt.Graphics,int)
location: class java.awt.Color
Color color = new Color(r,g,b);

M:\Comp132\ColorPicker.java:36: cannot resolve symbol
symbol : constructor Color (int,java.awt.Graphics,int)
location: class java.awt.Color
g.setColor(new Color(r,g,b));

Grant Palin

WayfarerX

Dec 4, 2002 at 1:47 PM

You''re passing the Graphics object instead of the green value to the Color constructor. Try:


public void paint (Graphics g) {
  int red = 255;
  int green = 255;
  int blue = 255;
  Color color = new Color(red, green, blue);
  g.setColor(color);
  // Do your drawing commands
}

gpalin

Dec 4, 2002 at 2:27 PM

Ah-hah! Thanks!!

Grant Palin

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