Package org.eclipse.swt.graphics

Class RGB

  • public final class RGB
extends java.lang.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:
    Color

    • 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

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean equals​(java.lang.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.
      java.lang.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:
        java.lang.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:
        java.lang.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 Detail

      • 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​(java.lang.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 java.lang.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 java.lang.Object
        Returns:
        the receiver's hash
        See Also:
        equals(Object)

      • toString

        public java.lang.String toString()
        Returns a string containing a concise, human-readable description of the receiver.
        Overrides:
        toString in class java.lang.Object
        Returns:
        a string representation of the RGB