Package org.eclipse.swt.graphics

Class RGB

java.lang.Object
org.eclipse.swt.graphics.RGB
public final class RGB extends Object
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.

Since:
1.0
See Also:

  • 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 Details

    • 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 Details

    • 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:
      1.0

  • Method Details

    • getHSB

      public float[] getHSB()
      Returns the hue, saturation, and brightness of the color.
      Returns:
      color space values in float format (hue, saturation, brightness)
      Since:
      1.0

    • 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

      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:

    • 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