Color class is used encapsulate colors in the default sRGB color space or colors in arbitrary color spaces identified by a {@link 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 .
| Field Detail |
public static final Color white
public static final Color lightGray
public static final Color gray
public static final Color darkGray
public static final Color black
public static final Color red
public static final Color pink
public static final Color orange
public static final Color yellow
public static final Color green
public static final Color magenta
public static final Color cyan
public static final Color blue
private transient long pData
int value
private float[] frgbvalue
ColorSpace as float components (no alpha). If null after object construction, this must be an sRGB color constructed with 8-bit precision, so compute from the int color value.private float[] fvalue
ColorSpace as float components (no alpha). If null after object construction, this must be an sRGB color constructed with 8-bit precision, so compute from the int color value.private float falpha
float component. If frgbvalue is null, this is not valid data, so compute from the int color value.private ColorSpace cs
ColorSpace. If null, then it's default is sRGB.private PaintContext theContext
| Constructor Detail |
public Color(int r,
int g,
int b)
r - the red componentg - the green componentb - the blue component
public Color(int r,
int g,
int b,
int a)
r - the red componentg - the green componentb - the blue componenta - the alpha componentpublic Color(int rgb)
rgb - the combined RGB components
public Color(int rgba,
boolean hasalpha)
hasalpha argument is false, alpha is defaulted to 255.rgba - the combined RGBA componentshasalpha - true if the alpha bits are valid; false otherwise
public Color(float r,
float g,
float b)
r - the red componentg - the green componentb - the blue component
public Color(float r,
float g,
float b,
float a)
r - the red componentg - the green componentb - the blue componenta - the alpha component
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 componentscomponents - an arbitrary number of color components that is compatible with thealpha - alpha valueIllegalArgumentException - if any of the values in the components array or alpha is outside of the range 0.0 to 1.0| Method Detail |
private static native void initIDs()
private static void testColorValueRange(int r,
int g,
int b,
int a)
r - the Red componentg - the Green componentb - the Blue component
private static void testColorValueRange(float r,
float g,
float b,
float a)
float components supplied for validity. Throws an IllegalArgumentException if the value is out of range.r - the Red componentg - the Green componentb - the Blue componentpublic int getRed()
public int getGreen()
public int getBlue()
public int getAlpha()
public int getRGB()
ColorModel.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.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.public int hashCode()
Color.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, and blue values as this object.
obj - the object to test for equality with this Colortrue if the objects are the same; false otherwise.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.Color.public static Color decode(String nm)
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 integerColor object.NumberFormatException - if the specified string cannot be interpreted as a decimal, octal, or hexidecimal integer.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 propertyColor converted from the system property.
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 propertyv - the default ColorColor converted from the system property, or the specified Color.
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 propertyv - the default color value, as an integerColor converted from the system property or the Color converted from the specified integer.
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 {@link #getRGB() getRGB}. This integer can be supplied as an argument to the Color constructor that takes a single integer argument.
hue - the hue component of the colorsaturation - the saturation of the colorbrightness - the brightness of the color
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 colorg - the green component of the colorb - the blue component of the colorhsbvals - the array used to return the three HSB values, or null
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 components - the saturation of the colorb - the brightness of the colorColor 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 returnsfloat 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 returnsfloat 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 returnsfloat 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 returnsfloat 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 ColorSpacecompArray - an array that this method fills with the color and alpha components of this Color in the specified ColorSpace and returnsfloat 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 ColorSpacecompArray - an array that this method fills with the color components of this Color in the specified ColorSpacefloat array.public ColorSpace getColorSpace()
ColorSpace of this Color.Color object's ColorSpace.
public synchronized PaintContext createContext(ColorModel cm,
Rectangle r,
Rectangle2D r2d,
AffineTransform xform,
RenderingHints hints)
Color object to be used as an argument to any method requiring an object implementing the {@link Paint} interface. The same PaintContext is returned, regardless of whether or not r, r2d, xform, or hints are null.cm - the specified ColorModelr - the specified {@link Rectangle}r2d - the specified {@link Rectangle2D}xform - the specified {@link AffineTransform}hints - the specified {@link RenderingHints}PaintContext that is used to generate a solid color pattern.public int getTransparency()
Color. This is required to implement the Paint interface.Color object's transparency mode.