Package org.eclipse.swt.graphics

Class RGB

java.lang.Object

org.eclipse.swt.graphics.RGB

All Implemented Interfaces:

Serializable

public final class RGB
extends Object
implements Serializable

Instances of this class are descriptions of colors in terms of the primary additive color model (red, green and blue). A color may be described in terms of the relative intensities of these three primary colors. The brightness of each color is specified by a value in the range 0 to 255, where 0 indicates no color (blackness) and 255 indicates maximum intensity.

The hashCode() method in this class uses the values of the public fields to compute the hash value. When storing instances of the class in hashed collections, do not modify these fields after the object has been inserted.

Application code does not need to explicitly release the resources managed by each instance when those instances are no longer required, and thus no dispose() method is provided.

See Also:

Color, Color and RGB snippets, Sample code and further information, Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
int	blue	the blue component of the RGB
int	green	the green component of the RGB
int	red	the red component of the RGB

Constructor Summary

Constructors

Constructor	Description
RGB(float hue, float saturation, float brightness)	Constructs an instance of this class with the given hue, saturation, and brightness.
RGB(int red, int green, int blue)	Constructs an instance of this class with the given red, green and blue values.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object object)	Compares the argument to the receiver, and returns true if they represent the same object using a class specific comparison.
float[]	getHSB()	Returns the hue, saturation, and brightness of the color.
int	hashCode()	Returns an integer hash code for the receiver.
String	toString()	Returns a string containing a concise, human-readable description of the receiver.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

red

public int red

the red component of the RGB

green

public int green

the green component of the RGB

blue

public int blue

the blue component of the RGB

Constructor Detail

RGB

public RGB(int red,
           int green,
           int blue)

Constructs an instance of this class with the given red, green and blue values.

Parameters:

red - the red component of the new instance

green - the green component of the new instance

blue - the blue component of the new instance

Throws:

IllegalArgumentException -

• ERROR_INVALID_ARGUMENT - if the red, green or blue argument is not between 0 and 255

RGB

public RGB(float hue,
           float saturation,
           float brightness)

Constructs an instance of this class with the given hue, saturation, and brightness.

Parameters:

hue - the hue value for the HSB color (from 0 to 360)

saturation - the saturation value for the HSB color (from 0 to 1)

brightness - the brightness value for the HSB color (from 0 to 1)

Throws:

IllegalArgumentException -

• ERROR_INVALID_ARGUMENT - if the hue is not between 0 and 360 or the saturation or brightness is not between 0 and 1

Since:

3.2

Method Detail

getHSB

public float[] getHSB()

Returns the hue, saturation, and brightness of the color.

Returns:

color space values in float format:

• hue (from 0 to 360)
• saturation (from 0 to 1)
• brightness (from 0 to 1)

Since:

3.2

See Also:

RGB(float, float, float)

equals

public boolean equals(Object object)

Compares the argument to the receiver, and returns true if they represent the same object using a class specific comparison.

Overrides:

equals in class Object

Parameters:

object - the object to compare with this object

Returns:

true if the object is the same as this object and false otherwise

See Also:

hashCode()

hashCode

public int hashCode()

Returns an integer hash code for the receiver. Any two objects that return true when passed to equals must return the same value for this method.

Overrides:

hashCode in class Object

Returns:

the receiver's hash

See Also:

equals(Object)

toString

public String toString()

Returns a string containing a concise, human-readable description of the receiver.

Overrides:

toString in class Object

Returns:

a string representation of the RGB