- java.lang.Object
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- java.awt.Color
 
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- All Implemented Interfaces:
- Paint,- Transparency,- Serializable
 - Direct Known Subclasses:
- ColorUIResource,- SystemColor
 
 public class Color extends Object implements Paint, Serializable TheColorclass is used to encapsulate colors in the default sRGB color space or colors in arbitrary color spaces identified by aColorSpace. 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 aColorwith an explicit alpha or getting the color/alpha components of aColor, 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 . - See Also:
- ColorSpace,- AlphaComposite, Serialized Form
 
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Field SummaryFields Modifier and Type Field Description static ColorblackThe color black.static ColorBLACKThe color black.static ColorblueThe color blue.static ColorBLUEThe color blue.static ColorcyanThe color cyan.static ColorCYANThe color cyan.static ColorDARK_GRAYThe color dark gray.static ColordarkGrayThe color dark gray.static ColorgrayThe color gray.static ColorGRAYThe color gray.static ColorgreenThe color green.static ColorGREENThe color green.static ColorLIGHT_GRAYThe color light gray.static ColorlightGrayThe color light gray.static ColormagentaThe color magenta.static ColorMAGENTAThe color magenta.static ColororangeThe color orange.static ColorORANGEThe color orange.static ColorpinkThe color pink.static ColorPINKThe color pink.static ColorredThe color red.static ColorREDThe color red.static ColorwhiteThe color white.static ColorWHITEThe color white.static ColoryellowThe color yellow.static ColorYELLOWThe color yellow.- 
Fields declared in interface java.awt.TransparencyBITMASK, OPAQUE, TRANSLUCENT
 
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Constructor SummaryConstructors Constructor Description Color(float r, float g, float b)Creates an opaque sRGB color with the specified red, green, and blue values in the range (0.0 - 1.0).Color(float r, float g, float b, float a)Creates an sRGB color with the specified red, green, blue, and alpha values in the range (0.0 - 1.0).Color(int rgb)Creates an opaque sRGB color with the specified combined RGB value consisting of the red component in bits 16-23, the green component in bits 8-15, and the blue component in bits 0-7.Color(int rgba, boolean hasalpha)Creates an sRGB color with the specified combined RGBA value consisting of the alpha component in bits 24-31, the red component in bits 16-23, the green component in bits 8-15, and the blue component in bits 0-7.Color(int r, int g, int b)Creates an opaque sRGB color with the specified red, green, and blue values in the range (0 - 255).Color(int r, int g, int b, int a)Creates an sRGB color with the specified red, green, blue, and alpha values in the range (0 - 255).Color(ColorSpace cspace, float[] components, float alpha)Creates a color in the specifiedColorSpacewith the color components specified in thefloatarray and the specified alpha.
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Method SummaryAll Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description Colorbrighter()Creates a newColorthat is a brighter version of thisColor.PaintContextcreateContext(ColorModel cm, Rectangle r, Rectangle2D r2d, AffineTransform xform, RenderingHints hints)Creates and returns aPaintContextused to generate a solid color field pattern.Colordarker()Creates a newColorthat is a darker version of thisColor.static Colordecode(String nm)Converts aStringto an integer and returns the specified opaqueColor.booleanequals(Object obj)Determines whether another object is equal to thisColor.intgetAlpha()Returns the alpha component in the range 0-255.intgetBlue()Returns the blue component in the range 0-255 in the default sRGB space.static ColorgetColor(String nm)Finds a color in the system properties.static ColorgetColor(String nm, int v)Finds a color in the system properties.static ColorgetColor(String nm, Color v)Finds a color in the system properties.float[]getColorComponents(float[] compArray)Returns afloatarray containing only the color components of theColor, in theColorSpaceof theColor.float[]getColorComponents(ColorSpace cspace, float[] compArray)Returns afloatarray containing only the color components of theColorin theColorSpacespecified by thecspaceparameter.ColorSpacegetColorSpace()Returns theColorSpaceof thisColor.float[]getComponents(float[] compArray)Returns afloatarray containing the color and alpha components of theColor, in theColorSpaceof theColor.float[]getComponents(ColorSpace cspace, float[] compArray)Returns afloatarray containing the color and alpha components of theColor, in theColorSpacespecified by thecspaceparameter.intgetGreen()Returns the green component in the range 0-255 in the default sRGB space.static ColorgetHSBColor(float h, float s, float b)Creates aColorobject based on the specified values for the HSB color model.intgetRed()Returns the red component in the range 0-255 in the default sRGB space.intgetRGB()Returns the RGB value representing the color in the default sRGBColorModel.float[]getRGBColorComponents(float[] compArray)Returns afloatarray containing only the color components of theColor, in the default sRGB color space.float[]getRGBComponents(float[] compArray)Returns afloatarray containing the color and alpha components of theColor, as represented in the default sRGB color space.intgetTransparency()Returns the transparency mode for thisColor.inthashCode()Computes the hash code for thisColor.static intHSBtoRGB(float hue, float saturation, float brightness)Converts the components of a color, as specified by the HSB model, to an equivalent set of values for the default RGB model.static float[]RGBtoHSB(int r, int g, int b, float[] hsbvals)Converts the components of a color, as specified by the default RGB model, to an equivalent set of values for hue, saturation, and brightness that are the three components of the HSB model.StringtoString()Returns a string representation of thisColor.
 
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Field Detail- 
whitepublic static final Color white The color white. In the default sRGB space.
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WHITEpublic static final Color WHITE The color white. In the default sRGB space.- Since:
- 1.4
 
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lightGraypublic static final Color lightGray The color light gray. In the default sRGB space.
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LIGHT_GRAYpublic static final Color LIGHT_GRAY The color light gray. In the default sRGB space.- Since:
- 1.4
 
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graypublic static final Color gray The color gray. In the default sRGB space.
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GRAYpublic static final Color GRAY The color gray. In the default sRGB space.- Since:
- 1.4
 
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darkGraypublic static final Color darkGray The color dark gray. In the default sRGB space.
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DARK_GRAYpublic static final Color DARK_GRAY The color dark gray. In the default sRGB space.- Since:
- 1.4
 
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blackpublic static final Color black The color black. In the default sRGB space.
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BLACKpublic static final Color BLACK The color black. In the default sRGB space.- Since:
- 1.4
 
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redpublic static final Color red The color red. In the default sRGB space.
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REDpublic static final Color RED The color red. In the default sRGB space.- Since:
- 1.4
 
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pinkpublic static final Color pink The color pink. In the default sRGB space.
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PINKpublic static final Color PINK The color pink. In the default sRGB space.- Since:
- 1.4
 
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orangepublic static final Color orange The color orange. In the default sRGB space.
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ORANGEpublic static final Color ORANGE The color orange. In the default sRGB space.- Since:
- 1.4
 
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yellowpublic static final Color yellow The color yellow. In the default sRGB space.
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YELLOWpublic static final Color YELLOW The color yellow. In the default sRGB space.- Since:
- 1.4
 
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greenpublic static final Color green The color green. In the default sRGB space.
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GREENpublic static final Color GREEN The color green. In the default sRGB space.- Since:
- 1.4
 
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magentapublic static final Color magenta The color magenta. In the default sRGB space.
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MAGENTApublic static final Color MAGENTA The color magenta. In the default sRGB space.- Since:
- 1.4
 
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cyanpublic static final Color cyan The color cyan. In the default sRGB space.
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CYANpublic static final Color CYAN The color cyan. In the default sRGB space.- Since:
- 1.4
 
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bluepublic static final Color blue The color blue. In the default sRGB space.
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BLUEpublic static final Color BLUE The color blue. In the default sRGB space.- Since:
- 1.4
 
 
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Constructor Detail- 
Colorpublic Color(int r, int g, int b)Creates an opaque sRGB color with the specified red, green, and blue values in the range (0 - 255). The actual color used in rendering depends on finding the best match given the color space available for a given output device. Alpha is defaulted to 255.- Parameters:
- r- the red component
- g- the green component
- b- the blue component
- Throws:
- IllegalArgumentException- if- r,- gor- bare outside of the range 0 to 255, inclusive
- See Also:
- getRed(),- getGreen(),- getBlue(),- getRGB()
 
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Color@ConstructorProperties({"red","green","blue","alpha"}) public Color(int r, int g, int b, int a) Creates an sRGB color with the specified red, green, blue, and alpha values in the range (0 - 255).- Parameters:
- r- the red component
- g- the green component
- b- the blue component
- a- the alpha component
- Throws:
- IllegalArgumentException- if- r,- g,- bor- aare outside of the range 0 to 255, inclusive
- See Also:
- getRed(),- getGreen(),- getBlue(),- getAlpha(),- getRGB()
 
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Colorpublic Color(int rgb) Creates an opaque sRGB color with the specified combined RGB value consisting of the red component in bits 16-23, the green component in bits 8-15, and the blue component in bits 0-7. The actual color used in rendering depends on finding the best match given the color space available for a particular output device. Alpha is defaulted to 255.- Parameters:
- rgb- the combined RGB components
- See Also:
- ColorModel.getRGBdefault(),- getRed(),- getGreen(),- getBlue(),- getRGB()
 
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Colorpublic Color(int rgba, boolean hasalpha)Creates an sRGB color with the specified combined RGBA value consisting of the alpha component in bits 24-31, the red component in bits 16-23, the green component in bits 8-15, and the blue component in bits 0-7. If thehasalphaargument isfalse, alpha is defaulted to 255.- Parameters:
- rgba- the combined RGBA components
- hasalpha-- trueif the alpha bits are valid;- falseotherwise
- See Also:
- ColorModel.getRGBdefault(),- getRed(),- getGreen(),- getBlue(),- getAlpha(),- getRGB()
 
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Colorpublic Color(float r, float g, float b)Creates an opaque sRGB color with the specified red, green, and blue values in the range (0.0 - 1.0). Alpha is defaulted to 1.0. The actual color used in rendering depends on finding the best match given the color space available for a particular output device.- Parameters:
- r- the red component
- g- the green component
- b- the blue component
- Throws:
- IllegalArgumentException- if- r,- gor- bare outside of the range 0.0 to 1.0, inclusive
- See Also:
- getRed(),- getGreen(),- getBlue(),- getRGB()
 
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Colorpublic Color(float r, float g, float b, float a)Creates an sRGB color with the specified red, green, blue, and alpha values in the range (0.0 - 1.0). The actual color used in rendering depends on finding the best match given the color space available for a particular output device.- Parameters:
- r- the red component
- g- the green component
- b- the blue component
- a- the alpha component
- Throws:
- IllegalArgumentException- if- r,- g- bor- aare outside of the range 0.0 to 1.0, inclusive
- See Also:
- getRed(),- getGreen(),- getBlue(),- getAlpha(),- getRGB()
 
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Colorpublic Color(ColorSpace cspace, float[] components, float alpha) Creates a color in the specifiedColorSpacewith the color components specified in thefloatarray and the specified alpha. The number of components is determined by the type of theColorSpace. For example, RGB requires 3 components, but CMYK requires 4 components.- Parameters:
- cspace- the- ColorSpaceto be used to interpret the components
- components- an arbitrary number of color components that is compatible with the- ColorSpace
- alpha- alpha value
- Throws:
- IllegalArgumentException- if any of the values in the- componentsarray or- alphais outside of the range 0.0 to 1.0
- See Also:
- getComponents(float[]),- getColorComponents(float[])
 
 
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Method Detail- 
getRedpublic int getRed() Returns the red component in the range 0-255 in the default sRGB space.- Returns:
- the red component.
- See Also:
- getRGB()
 
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getGreenpublic int getGreen() Returns the green component in the range 0-255 in the default sRGB space.- Returns:
- the green component.
- See Also:
- getRGB()
 
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getBluepublic int getBlue() Returns the blue component in the range 0-255 in the default sRGB space.- Returns:
- the blue component.
- See Also:
- getRGB()
 
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getAlphapublic int getAlpha() Returns the alpha component in the range 0-255.- Returns:
- the alpha component.
- See Also:
- getRGB()
 
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getRGBpublic int getRGB() Returns the RGB value representing the color in the default sRGBColorModel. (Bits 24-31 are alpha, 16-23 are red, 8-15 are green, 0-7 are blue).- Returns:
- the RGB value of the color in the default sRGB
         ColorModel.
- Since:
- 1.0
- See Also:
- ColorModel.getRGBdefault(),- getRed(),- getGreen(),- getBlue()
 
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brighterpublic Color brighter() Creates a newColorthat is a brighter version of thisColor.This method applies an arbitrary scale factor to each of the three RGB components of this Colorto create a brighter version of thisColor. Thealphavalue is preserved. Althoughbrighteranddarkerare inverse operations, the results of a series of invocations of these two methods might be inconsistent because of rounding errors.- Returns:
- a new Colorobject that is a brighter version of thisColorwith the samealphavalue.
- Since:
- 1.0
- See Also:
- darker()
 
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darkerpublic Color darker() Creates a newColorthat is a darker version of thisColor.This method applies an arbitrary scale factor to each of the three RGB components of this Colorto create a darker version of thisColor. Thealphavalue is preserved. Althoughbrighteranddarkerare inverse operations, the results of a series of invocations of these two methods might be inconsistent because of rounding errors.- Returns:
- a new Colorobject that is a darker version of thisColorwith the samealphavalue.
- Since:
- 1.0
- See Also:
- brighter()
 
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hashCodepublic int hashCode() Computes the hash code for thisColor.- Overrides:
- hashCodein class- Object
- Returns:
- a hash code value for this object.
- Since:
- 1.0
- See Also:
- Object.equals(java.lang.Object),- System.identityHashCode(java.lang.Object)
 
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equalspublic boolean equals(Object obj) Determines whether another object is equal to thisColor.The result is trueif and only if the argument is notnulland is aColorobject that has the same red, green, blue, and alpha values as this object.- Overrides:
- equalsin class- Object
- Parameters:
- obj- the object to test for equality with this- Color
- Returns:
- trueif the objects are the same;- falseotherwise.
- Since:
- 1.0
- See Also:
- Object.hashCode(),- HashMap
 
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toStringpublic String toString() Returns a string representation of thisColor. 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 benull.
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decodepublic static Color decode(String nm) throws NumberFormatException Converts aStringto an integer and returns the specified opaqueColor. This method handles string formats that are used to represent octal and hexadecimal numbers.- Parameters:
- nm- a- Stringthat represents an opaque color as a 24-bit integer
- Returns:
- the new Colorobject.
- Throws:
- NumberFormatException- if the specified string cannot be interpreted as a decimal, octal, or hexadecimal integer.
- Since:
- 1.1
- See Also:
- Integer.decode(java.lang.String)
 
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getColorpublic static Color getColor(String nm) Finds a color in the system properties.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 Colorobject.If the specified property is not found or could not be parsed as an integer then nullis returned.- Parameters:
- nm- the name of the color property
- Returns:
- the Colorconverted from the system property.
- Since:
- 1.0
- See Also:
- System.getProperty(java.lang.String),- Integer.getInteger(java.lang.String),- Color(int)
 
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getColorpublic static Color getColor(String nm, Color v) Finds a color in the system properties.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 Colorobject.If the specified property is not found or cannot be parsed as an integer then the Colorspecified by the second argument is returned instead.- Parameters:
- nm- the name of the color property
- v- the default- Color
- Returns:
- the Colorconverted from the system property, or the specifiedColor.
- Since:
- 1.0
- See Also:
- System.getProperty(java.lang.String),- Integer.getInteger(java.lang.String),- Color(int)
 
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getColorpublic static Color getColor(String nm, int v) Finds a color in the system properties.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 Colorobject.If the specified property is not found or could not be parsed as an integer then the integer value vis used instead, and is converted to aColorobject.- Parameters:
- nm- the name of the color property
- v- the default color value, as an integer
- Returns:
- the Colorconverted from the system property or theColorconverted from the specified integer.
- Since:
- 1.0
- See Also:
- System.getProperty(java.lang.String),- Integer.getInteger(java.lang.String),- Color(int)
 
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HSBtoRGBpublic static int HSBtoRGB(float hue, float saturation, float brightness)Converts the components of a color, as specified by the HSB model, to an equivalent set of values for the default RGB model.The saturationandbrightnesscomponents should be floating-point values between zero and one (numbers in the range 0.0-1.0). Thehuecomponent 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 HSBtoRGBencodes the value of a color in bits 0-23 of an integer value that is the same format used by the methodgetRGB. This integer can be supplied as an argument to theColorconstructor that takes a single integer argument.- Parameters:
- hue- the hue component of the color
- saturation- the saturation of the color
- brightness- the brightness of the color
- Returns:
- the RGB value of the color with the indicated hue, saturation, and brightness.
- Since:
- 1.0
- See Also:
- getRGB(),- Color(int),- ColorModel.getRGBdefault()
 
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RGBtoHSBpublic static float[] RGBtoHSB(int r, int g, int b, float[] hsbvals)Converts the components of a color, as specified by the default RGB model, to an equivalent set of values for hue, saturation, and brightness that are the three components of the HSB model.If the hsbvalsargument isnull, then a new array is allocated to return the result. Otherwise, the method returns the arrayhsbvals, with the values put into that array.- Parameters:
- 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
- Returns:
- an array of three elements containing the hue, saturation, and brightness (in that order), of the color with the indicated red, green, and blue components.
- Since:
- 1.0
- See Also:
- getRGB(),- Color(int),- ColorModel.getRGBdefault()
 
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getHSBColorpublic static Color getHSBColor(float h, float s, float b) Creates aColorobject based on the specified values for the HSB color model.The sandbcomponents should be floating-point values between zero and one (numbers in the range 0.0-1.0). Thehcomponent 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.- Parameters:
- h- the hue component
- s- the saturation of the color
- b- the brightness of the color
- Returns:
- a Colorobject with the specified hue, saturation, and brightness.
- Since:
- 1.0
 
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getRGBComponentspublic float[] getRGBComponents(float[] compArray) Returns afloatarray containing the color and alpha components of theColor, as represented in the default sRGB color space. IfcompArrayisnull, an array of length 4 is created for the return value. Otherwise,compArraymust have length 4 or greater, and it is filled in with the components and returned.- Parameters:
- compArray- an array that this method fills with color and alpha components and returns
- Returns:
- the RGBA components in a floatarray.
 
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getRGBColorComponentspublic float[] getRGBColorComponents(float[] compArray) Returns afloatarray containing only the color components of theColor, in the default sRGB color space. IfcompArrayisnull, an array of length 3 is created for the return value. Otherwise,compArraymust have length 3 or greater, and it is filled in with the components and returned.- Parameters:
- compArray- an array that this method fills with color components and returns
- Returns:
- the RGB components in a floatarray.
 
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getComponentspublic float[] getComponents(float[] compArray) Returns afloatarray containing the color and alpha components of theColor, in theColorSpaceof theColor. IfcompArrayisnull, an array with length equal to the number of components in the associatedColorSpaceplus one is created for the return value. Otherwise,compArraymust have at least this length and it is filled in with the components and returned.- Parameters:
- compArray- an array that this method fills with the color and alpha components of this- Colorin its- ColorSpaceand returns
- Returns:
- the color and alpha components in a floatarray.
 
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getColorComponentspublic float[] getColorComponents(float[] compArray) Returns afloatarray containing only the color components of theColor, in theColorSpaceof theColor. IfcompArrayisnull, an array with length equal to the number of components in the associatedColorSpaceis created for the return value. Otherwise,compArraymust have at least this length and it is filled in with the components and returned.- Parameters:
- compArray- an array that this method fills with the color components of this- Colorin its- ColorSpaceand returns
- Returns:
- the color components in a floatarray.
 
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getComponentspublic float[] getComponents(ColorSpace cspace, float[] compArray) Returns afloatarray containing the color and alpha components of theColor, in theColorSpacespecified by thecspaceparameter. IfcompArrayisnull, an array with length equal to the number of components incspaceplus one is created for the return value. Otherwise,compArraymust have at least this length, and it is filled in with the components and returned.- Parameters:
- cspace- a specified- ColorSpace
- compArray- an array that this method fills with the color and alpha components of this- Colorin the specified- ColorSpaceand returns
- Returns:
- the color and alpha components in a floatarray.
 
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getColorComponentspublic float[] getColorComponents(ColorSpace cspace, float[] compArray) Returns afloatarray containing only the color components of theColorin theColorSpacespecified by thecspaceparameter. IfcompArrayisnull, an array with length equal to the number of components incspaceis created for the return value. Otherwise,compArraymust have at least this length, and it is filled in with the components and returned.- Parameters:
- cspace- a specified- ColorSpace
- compArray- an array that this method fills with the color components of this- Colorin the specified- ColorSpace
- Returns:
- the color components in a floatarray.
 
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getColorSpacepublic ColorSpace getColorSpace() Returns theColorSpaceof thisColor.- Returns:
- this Colorobject'sColorSpace.
 
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createContextpublic PaintContext createContext(ColorModel cm, Rectangle r, Rectangle2D r2d, AffineTransform xform, RenderingHints hints) Creates and returns aPaintContextused to generate a solid color field pattern. See thespecificationof the method in thePaintinterface for information on null parameter handling.- Specified by:
- createContextin interface- Paint
- Parameters:
- cm- the preferred- ColorModelwhich represents the most convenient format for the caller to receive the pixel data, or- nullif there is no preference.
- r- the device space bounding box of the graphics primitive being rendered.
- r2d- the user space bounding box of the graphics primitive being rendered.
- xform- the- AffineTransformfrom user space into device space.
- hints- the set of hints that the context object can use to choose between rendering alternatives.
- Returns:
- the PaintContextfor generating color patterns.
- See Also:
- Paint,- PaintContext,- ColorModel,- Rectangle,- Rectangle2D,- AffineTransform,- RenderingHints
 
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getTransparencypublic int getTransparency() Returns the transparency mode for thisColor. This is required to implement thePaintinterface.- Specified by:
- getTransparencyin interface- Transparency
- Returns:
- this Colorobject's transparency mode.
- See Also:
- Paint,- Transparency,- createContext(java.awt.image.ColorModel, java.awt.Rectangle, java.awt.geom.Rectangle2D, java.awt.geom.AffineTransform, java.awt.RenderingHints)
 
 
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