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Home » Java » Applets » Color in Java Example
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Color in Java Example

By Dinesh Thakur

However, if you want to change the color of the text or GUI components, Java provides the Color class contained in java.awt.package. Every color is made up of red, green and blue components, each represented by an unsigned byte value that describes its intensity. You can specify the intensity of each color to be a value ranging from 0 to 255 where 0 represents the darkest shade and 255 represents the lightest shade. This is known as RGB model.

In order to create a Color object use the following constructors.

• public Color (int r, int g, int b) : The three parameters r, g, b correspond to the intensities of red, green and blue components of the Color respectively. The values that these parameters can hold range from 0 to 255. If you specify a value beyond this range then an IllegalArgumentException exception will be raised. For example: The statement.

Color c = newColor (255,200,0);

creates a Color object that represent the color orange. The first RGB component (i.e. 255) represents the amount of red, the second (i.e. 200) represents the amount of green and the third(i.e. 0) represents the amount of blue. Together these components form the orange color.

• public Color(float r, float g, float b): The three parameters r,g,b correspond to the intensities of red, green and blue components that can be represented by floating-point values in the range 0.0.to 1.0.

 

Color Interface

 

Method

Returns

Notes

Color(float r, float g, float b)

 

Each constructor has the same range of colors but receives them in various formats

Color(int rgb)

 

 

Color(int r, int g, int b)

 

 

brighter()

Color

The returned color is brighter by some color model specific amount

darker()

Color

The returned color is

darker  brighter by some color model specific amount

equals(Object obj)

Boolean

Is the passed object a color that has the same RGB component? 

getBlue()

Int

Gets the blue component of this color object

getColor(String name)

Static Color

Looks up the “name” in the system properties and converts the property into a color

getColor(String name, Color c)

Static Color

Looks up the “name” in the system properties and converts the property into a color; if the property doesn’t exist, returns the passed color

getColor(String name, int rgb)

Static Color

Looks up the “name” in the system properties and converts the property into a color; if the property doesn’t exist, returns a color that matches the passed int (in RGB format)

getGreen()

Int

Gets the green component of this color object

getHSBColor(float h, float s, float b)

Static Color

Returns a color that represents the passed hue, saturation, and brightness

getRed()

Int

Gets the red component of this color object

getRGB()

Int

Returns a 32-bit color where all components are in the range 0-255, red is in bits 16-23, green in 8-15, and blue is in 0-7

HSBtoRGB(float h, float s, float b)

Int

Same as HSBcolor(), except returns the color as an int in RGB format 

RGBtoHSB(int r, int g, int b, float hsbvals[])

Static float[]

Converts the passed integer color components to HSB form; if hsbvals is null, creates a new array of floats for the result; if a float array is passed for hsbvals, updates the passed array with the hue, saturation, and brightness

 

 

import java.awt.*; 
class ColorExample extends Frame
{
   ColorExample()
   {
          Color frameColor = new Color(0,255,255);
          setLayout(new FlowLayout());
          setBackground(frameColor);
          Button btnCancel = new Button("Cancel");
          btnCancel.setBackground(Color.BLACK);
          btnCancel.setForeground(Color.WHITE);
          add(btnCancel);
  
    }
}
 class ColorJavaExample
{
          public static void main(String args[])
       {
              ColorExample frame = new ColorExample();
              frame.setTitle("Color in Java Example");
              frame.setSize(400,150);
              frame.setVisible(true);
        }
}

Color in Java Example

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  4. JFrame Color in Java Swing Example
  5. What is 32-bit color?
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About Dinesh Thakur
Dinesh ThakurDinesh Thakur holds an B.C.A, MCDBA, MCSD certifications. Dinesh authors the hugely popular Computer Notes blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps.

Dinesh Thakur is a Freelance Writer who helps different clients from all over the globe. Dinesh has written over 500+ blogs, 30+ eBooks, and 10000+ Posts for all types of clients.


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