java.lang.Object java.awt.Color
public class Color
The Color class is used to encapsulate colors in the default sRGB color space or colors in arbitrary color spaces identified by a ColorSpace. Every color has an implicit alpha value of 1.0 or an explicit one provided in the constructor. The alpha value defines the transparency of a color and can be represented by a float value in the range 0.0 - 1.0 or 0 - 255. An alpha value of 1.0 or 255 means that the color is completely opaque and an alpha value of 0 or 0.0 means that the color is completely transparent. When constructing a Color with an explicit alpha or getting the color/alpha components of a Color, the color components are never premultiplied by the alpha component.
The default color space for the Java 2D(tm) API is sRGB, a proposed standard RGB color space. For further information on sRGB, see http://www.w3.org/pub/WWW/Graphics/Color/sRGB.html .
ColorSpace, AlphaComposite, Serialized Form
Color(ColorSpace cspace, float[] components, float alpha)
ColorSpace with the color components specified in the float array and the specified alpha. Color(float r, float g, float b)
Color(float r, float g, float b, float a)
Color(int rgb)
Color(int rgba, boolean hasalpha)
Color(int r, int g, int b)
Color(int r, int g, int b, int a)
Color brighter()
Color that is a brighter version of this Color. PaintContext createContext(ColorModel cm, Rectangle r, Rectangle2D r2d, AffineTransform xform, RenderingHints hints)
PaintContext used to generate a solid color pattern. Color darker()
Color that is a darker version of this Color. static Color decode(String nm)
String to an integer and returns the specified opaque Color. boolean equals(Object obj)
Color. int getAlpha()
int getBlue()
static Color getColor(String nm)
static Color getColor(String nm, Color v)
static Color getColor(String nm, int v)
float[] getColorComponents(ColorSpace cspace, float[] compArray)
float array containing only the color components of the Color in the ColorSpace specified by the cspace parameter. float[] getColorComponents(float[] compArray)
float array containing only the color components of the Color, in the ColorSpace of the Color. ColorSpace getColorSpace()
ColorSpace of this Color. float[] getComponents(ColorSpace cspace, float[] compArray)
float array containing the color and alpha components of the Color, in the ColorSpace specified by the cspace parameter. float[] getComponents(float[] compArray)
float array containing the color and alpha components of the Color, in the ColorSpace of the Color. int getGreen()
static Color getHSBColor(float h, float s, float b)
Color object based on the specified values for the HSB color model. int getRed()
int getRGB()
ColorModel. float[] getRGBColorComponents(float[] compArray)
float array containing only the color components of the Color, in the default sRGB color space. float[] getRGBComponents(float[] compArray)
float array containing the color and alpha components of the Color, as represented in the default sRGB color space. int getTransparency()
Color. int hashCode()
Color. static int HSBtoRGB(float hue, float saturation, float brightness)
static float[] RGBtoHSB(int r, int g, int b, float[] hsbvals)
String toString()
Color. white
public static final Color white
public static final Color WHITE
public static final Color lightGray
public static final Color LIGHT_GRAY
public static final Color gray
public static final Color GRAY
public static final Color darkGray
public static final Color DARK_GRAY
public static final Color black
public static final Color BLACK
public static final Color red
public static final Color RED
public static final Color pink
public static final Color PINK
public static final Color orange
public static final Color ORANGE
public static final Color yellow
public static final Color YELLOW
public static final Color green
public static final Color GREEN
public static final Color magenta
public static final Color MAGENTA
public static final Color cyan
public static final Color CYAN
public static final Color blue
public static final Color BLUE
public Color(int r,
int g,
int b)
r - the red component
g - the green component
b - the blue component
IllegalArgumentException - if r, g or b are outside of the range 0 to 255, inclusive
getRed(), getGreen(), getBlue(), getRGB()
public Color(int r,
int g,
int b,
int a)
r - the red component
g - the green component
b - the blue component
a - the alpha component
IllegalArgumentException - if r, g, b or a are outside of the range 0 to 255, inclusive
getRed(), getGreen(), getBlue(), getAlpha(), getRGB()
public Color(int rgb)
rgb - the combined RGB components
ColorModel.getRGBdefault(), getRed(), getGreen(), getBlue(), getRGB()
public Color(int rgba,
boolean hasalpha)
hasalpha argument is false, alpha is defaulted to 255.
rgba - the combined RGBA components
hasalpha - true if the alpha bits are valid; false otherwise
ColorModel.getRGBdefault(), getRed(), getGreen(), getBlue(), getAlpha(), getRGB()
public Color(float r,
float g,
float b)
r - the red component
g - the green component
b - the blue component
IllegalArgumentException - if r, g or b are outside of the range 0.0 to 1.0, inclusive
getRed(), getGreen(), getBlue(), getRGB()
public Color(float r,
float g,
float b,
float a)
r - the red component
g - the green component
b - the blue component
a - the alpha component
IllegalArgumentException - if r, g b or a are outside of the range 0.0 to 1.0, inclusive
getRed(), getGreen(), getBlue(), getAlpha(), getRGB()
public Color(ColorSpace cspace,
float[] components,
float alpha)
ColorSpace with the color components specified in the float array and the specified alpha. The number of components is determined by the type of the ColorSpace. For example, RGB requires 3 components, but CMYK requires 4 components.
cspace - the ColorSpace to be used to interpret the components
components - an arbitrary number of color components that is compatible with the
alpha - alpha value
IllegalArgumentException - if any of the values in the components array or alpha is outside of the range 0.0 to 1.0
getComponents(float[]), getColorComponents(float[])
public int getRed()
getRGB()
public int getGreen()
getRGB()
public int getBlue()
getRGB()
public int getAlpha()
getRGB()
public int getRGB()
ColorModel. (Bits 24-31 are alpha, 16-23 are red, 8-15 are green, 0-7 are blue).
ColorModel.
ColorModel.getRGBdefault(), getRed(), getGreen(), getBlue()
public Color brighter()
Color that is a brighter version of this Color.
This method applies an arbitrary scale factor to each of the three RGB components of this Color to create a brighter version of this Color. Although brighter and darker are inverse operations, the results of a series of invocations of these two methods might be inconsistent because of rounding errors.
Color object that is a brighter version of this Color.
darker()
public Color darker()
Color that is a darker version of this Color.
This method applies an arbitrary scale factor to each of the three RGB components of this Color to create a darker version of this Color. Although brighter and darker are inverse operations, the results of a series of invocations of these two methods might be inconsistent because of rounding errors.
Color object that is a darker version of this Color.
brighter()
public int hashCode()
Color.
hashCode in class Object
Object.equals(java.lang.Object), Hashtable
public boolean equals(Object obj)
Color.
The result is true if and only if the argument is not null and is a Color object that has the same red, green, blue, and alpha values as this object.
equals in class Object
obj - the object to test for equality with this Color
true if the objects are the same; false otherwise.
Object.hashCode(), Hashtable
public String toString()
Color. This method is intended to be used only for debugging purposes. The content and format of the returned string might vary between implementations. The returned string might be empty but cannot be null.
toString in class Object
Color.
public static Color decode(String nm)
throws NumberFormatException
String to an integer and returns the specified opaque Color. This method handles string formats that are used to represent octal and hexidecimal numbers.
nm - a String that represents an opaque color as a 24-bit integer
Color object.
NumberFormatException - if the specified string cannot be interpreted as a decimal, octal, or hexidecimal integer.
Integer.decode(java.lang.String)
public static Color getColor(String nm)
The argument is treated as the name of a system property to be obtained. The string value of this property is then interpreted as an integer which is then converted to a Color object.
If the specified property is not found or could not be parsed as an integer then null is returned.
nm - the name of the color property
Color converted from the system property.
System.getProperty(java.lang.String), Integer.getInteger(java.lang.String), Color(int)
public static Color getColor(String nm,
Color v)
The first argument is treated as the name of a system property to be obtained. The string value of this property is then interpreted as an integer which is then converted to a Color object.
If the specified property is not found or cannot be parsed as an integer then the Color specified by the second argument is returned instead.
nm - the name of the color property
v - the default Color
Color converted from the system property, or the specified Color.
System.getProperty(java.lang.String), Integer.getInteger(java.lang.String), Color(int)
public static Color getColor(String nm,
int v)
The first argument is treated as the name of a system property to be obtained. The string value of this property is then interpreted as an integer which is then converted to a Color object.
If the specified property is not found or could not be parsed as an integer then the integer value v is used instead, and is converted to a Color object.
nm - the name of the color property
v - the default color value, as an integer
Color converted from the system property or the Color converted from the specified integer.
System.getProperty(java.lang.String), Integer.getInteger(java.lang.String), Color(int)
public static int HSBtoRGB(float hue,
float saturation,
float brightness)
The saturation and brightness components should be floating-point values between zero and one (numbers in the range 0.0-1.0). The hue component can be any floating-point number. The floor of this number is subtracted from it to create a fraction between 0 and 1. This fractional number is then multiplied by 360 to produce the hue angle in the HSB color model.
The integer that is returned by HSBtoRGB encodes the value of a color in bits 0-23 of an integer value that is the same format used by the method getRGBColor constructor that takes a single integer argument.
hue - the hue component of the color
saturation - the saturation of the color
brightness - the brightness of the color
getRGB(), Color(int), ColorModel.getRGBdefault()
public static float[] RGBtoHSB(int r,
int g,
int b,
float[] hsbvals)
If the hsbvals argument is null, then a new array is allocated to return the result. Otherwise, the method returns the array hsbvals, with the values put into that array.
r - the red component of the color
g - the green component of the color
b - the blue component of the color
hsbvals - the array used to return the three HSB values, or null
getRGB(), Color(int), ColorModel.getRGBdefault()
public static Color getHSBColor(float h,
float s,
float b)
Color object based on the specified values for the HSB color model.
The s and b components should be floating-point values between zero and one (numbers in the range 0.0-1.0). The h component can be any floating-point number. The floor of this number is subtracted from it to create a fraction between 0 and 1. This fractional number is then multiplied by 360 to produce the hue angle in the HSB color model.
h - the hue component
s - the saturation of the color
b - the brightness of the color
Color object with the specified hue, saturation, and brightness.
public float[] getRGBComponents(float[] compArray)
float array containing the color and alpha components of the Color, as represented in the default sRGB color space. If compArray is null, an array of length 4 is created for the return value. Otherwise, compArray must have length 4 or greater, and it is filled in with the components and returned.
compArray - an array that this method fills with color and alpha components and returns
float array.
public float[] getRGBColorComponents(float[] compArray)
float array containing only the color components of the Color, in the default sRGB color space. If compArray is null, an array of length 3 is created for the return value. Otherwise, compArray must have length 3 or greater, and it is filled in with the components and returned.
compArray - an array that this method fills with color components and returns
float array.
public float[] getComponents(float[] compArray)
float array containing the color and alpha components of the Color, in the ColorSpace of the Color. If compArray is null, an array with length equal to the number of components in the associated ColorSpace plus one is created for the return value. Otherwise, compArray must have at least this length and it is filled in with the components and returned.
compArray - an array that this method fills with the color and alpha components of this Color in its ColorSpace and returns
float array.
public float[] getColorComponents(float[] compArray)
float array containing only the color components of the Color, in the ColorSpace of the Color. If compArray is null, an array with length equal to the number of components in the associated ColorSpace is created for the return value. Otherwise, compArray must have at least this length and it is filled in with the components and returned.
compArray - an array that this method fills with the color components of this Color in its ColorSpace and returns
float array.
public float[] getComponents(ColorSpace cspace,
float[] compArray)
float array containing the color and alpha components of the Color, in the ColorSpace specified by the cspace parameter. If compArray is null, an array with length equal to the number of components in cspace plus one is created for the return value. Otherwise, compArray must have at least this length, and it is filled in with the components and returned.
cspace - a specified ColorSpace
compArray - an array that this method fills with the color and alpha components of this Color in the specified ColorSpace and returns
float array.
public float[] getColorComponents(ColorSpace cspace,
float[] compArray)
float array containing only the color components of the Color in the ColorSpace specified by the cspace parameter. If compArray is null, an array with length equal to the number of components in cspace is created for the return value. Otherwise, compArray must have at least this length, and it is filled in with the components and returned.
cspace - a specified ColorSpace
compArray - an array that this method fills with the color components of this Color in the specified ColorSpace
float array.
public ColorSpace getColorSpace()
ColorSpace of this Color.
Color object's ColorSpace.
public PaintContext createContext(ColorModel cm,
Rectangle r,
Rectangle2D r2d,
AffineTransform xform,
RenderingHints hints)
PaintContext used to generate a solid color pattern. This enables a Color object to be used as an argument to any method requiring an object implementing the Paint interface. The same PaintContext is returned, regardless of whether or not r, r2d, xform, or hints are null.
createContext in interface Paint
cm - the specified ColorModel
r - the specified Rectangle
r2d - the specified Rectangle2D
xform - the specified AffineTransform
hints - the specified RenderingHints
PaintContext that is used to generate a solid color pattern.
Paint, PaintContext, Graphics2D.setPaint(java.awt.Paint)
public int getTransparency()
Color. This is required to implement the Paint interface.
getTransparency in interface Transparency
Color object's transparency mode.
Paint, Transparency, createContext(java.awt.image.ColorModel, java.awt.Rectangle, java.awt.geom.Rectangle2D, java.awt.geom.AffineTransform, java.awt.RenderingHints)
Copyright © 2004, 2010 Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.
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