Color (Java Platform SE 7 ) - Oracle Help Center

• Overview
• Package
• Class
• Use
• Tree
• Deprecated
• Index
• Help

Java™ PlatformStandard Ed. 7

• Prev Class
• Next Class

• Frames
• No Frames

• All Classes

• Summary:
• Nested |
• Field |
• Constr |
• Method

• Detail:
• Field |
• Constr |
• Method

java.awt

Class Color

• java.lang.Object
• • java.awt.Color

• All Implemented Interfaces: Paint, Transparency, Serializable Direct Known Subclasses: ColorUIResource, SystemColor public class Color extends Object implements Paint, Serializable 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 .

  See Also:ColorSpace, AlphaComposite, Serialized Form

• • Field Summary

    Fields

    Modifier and Type	Field and Description
    static Color	black The color black.
    static Color	BLACK The color black.
    static Color	blue The color blue.
    static Color	BLUE The color blue.
    static Color	cyan The color cyan.
    static Color	CYAN The color cyan.
    static Color	DARK_GRAY The color dark gray.
    static Color	darkGray The color dark gray.
    static Color	gray The color gray.
    static Color	GRAY The color gray.
    static Color	green The color green.
    static Color	GREEN The color green.
    static Color	LIGHT_GRAY The color light gray.
    static Color	lightGray The color light gray.
    static Color	magenta The color magenta.
    static Color	MAGENTA The color magenta.
    static Color	orange The color orange.
    static Color	ORANGE The color orange.
    static Color	pink The color pink.
    static Color	PINK The color pink.
    static Color	red The color red.
    static Color	RED The color red.
    static Color	white The color white.
    static Color	WHITE The color white.
    static Color	yellow The color yellow.
    static Color	YELLOW The color yellow.

    • Fields inherited from interface java.awt.Transparency

      BITMASK, OPAQUE, TRANSLUCENT

  • Constructor Summary

    Constructors

    Constructor and Description
    Color(ColorSpace cspace, float[] components, float alpha) Creates a color in the specified ColorSpace with the color components specified in the float array and the specified alpha.
    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).

  • Method Summary

    Methods

    Modifier and Type	Method and Description
    Color	brighter() Creates a new Color that is a brighter version of this Color.
    PaintContext	createContext(ColorModel cm, Rectangle r, Rectangle2D r2d, AffineTransform xform, RenderingHints hints) Creates and returns a PaintContext used to generate a solid color field pattern.
    Color	darker() Creates a new Color that is a darker version of this Color.
    static Color	decode(String nm) Converts a String to an integer and returns the specified opaque Color.
    boolean	equals(Object obj) Determines whether another object is equal to this Color.
    int	getAlpha() Returns the alpha component in the range 0-255.
    int	getBlue() Returns the blue component in the range 0-255 in the default sRGB space.
    static Color	getColor(String nm) Finds a color in the system properties.
    static Color	getColor(String nm, Color v) Finds a color in the system properties.
    static Color	getColor(String nm, int v) Finds a color in the system properties.
    float[]	getColorComponents(ColorSpace cspace, float[] compArray) Returns a float array containing only the color components of the Color in the ColorSpace specified by the cspace parameter.
    float[]	getColorComponents(float[] compArray) Returns a float array containing only the color components of the Color, in the ColorSpace of the Color.
    ColorSpace	getColorSpace() Returns the ColorSpace of this Color.
    float[]	getComponents(ColorSpace cspace, float[] compArray) Returns a float array containing the color and alpha components of the Color, in the ColorSpace specified by the cspace parameter.
    float[]	getComponents(float[] compArray) Returns a float array containing the color and alpha components of the Color, in the ColorSpace of the Color.
    int	getGreen() Returns the green component in the range 0-255 in the default sRGB space.
    static Color	getHSBColor(float h, float s, float b) Creates a Color object based on the specified values for the HSB color model.
    int	getRed() Returns the red component in the range 0-255 in the default sRGB space.
    int	getRGB() Returns the RGB value representing the color in the default sRGB ColorModel.
    float[]	getRGBColorComponents(float[] compArray) Returns a float array containing only the color components of the Color, in the default sRGB color space.
    float[]	getRGBComponents(float[] compArray) Returns a float array containing the color and alpha components of the Color, as represented in the default sRGB color space.
    int	getTransparency() Returns the transparency mode for this Color.
    int	hashCode() Computes the hash code for this Color.
    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.
    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.
    String	toString() Returns a string representation of this Color.

    • Methods inherited from class java.lang.Object

      clone, finalize, getClass, notify, notifyAll, wait, wait, wait

• • Field Detail

    • white

      public static final Color white The color white. In the default sRGB space.

    • WHITE

      public static final Color WHITE The color white. In the default sRGB space. Since: 1.4

    • lightGray

      public static final Color lightGray The color light gray. In the default sRGB space.

    • LIGHT_GRAY

      public static final Color LIGHT_GRAY The color light gray. In the default sRGB space. Since: 1.4

    • gray

      public static final Color gray The color gray. In the default sRGB space.

    • GRAY

      public static final Color GRAY The color gray. In the default sRGB space. Since: 1.4

    • darkGray

      public static final Color darkGray The color dark gray. In the default sRGB space.

    • DARK_GRAY

      public static final Color DARK_GRAY The color dark gray. In the default sRGB space. Since: 1.4

    • black

      public static final Color black The color black. In the default sRGB space.

    • BLACK

      public static final Color BLACK The color black. In the default sRGB space. Since: 1.4

    • red

      public static final Color red The color red. In the default sRGB space.

    • RED

      public static final Color RED The color red. In the default sRGB space. Since: 1.4

    • pink

      public static final Color pink The color pink. In the default sRGB space.

    • PINK

      public static final Color PINK The color pink. In the default sRGB space. Since: 1.4

    • orange

      public static final Color orange The color orange. In the default sRGB space.

    • ORANGE

      public static final Color ORANGE The color orange. In the default sRGB space. Since: 1.4

    • yellow

      public static final Color yellow The color yellow. In the default sRGB space.

    • YELLOW

      public static final Color YELLOW The color yellow. In the default sRGB space. Since: 1.4

    • green

      public static final Color green The color green. In the default sRGB space.

    • GREEN

      public static final Color GREEN The color green. In the default sRGB space. Since: 1.4

    • magenta

      public static final Color magenta The color magenta. In the default sRGB space.

    • MAGENTA

      public static final Color MAGENTA The color magenta. In the default sRGB space. Since: 1.4

    • cyan

      public static final Color cyan The color cyan. In the default sRGB space.

    • CYAN

      public static final Color CYAN The color cyan. In the default sRGB space. Since: 1.4

    • blue

      public static final Color blue The color blue. In the default sRGB space.

    • BLUE

      public static final Color BLUE The color blue. In the default sRGB space. Since: 1.4

  • Constructor Detail

    • Color

      public 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 componentg - the green componentb - the blue component Throws: IllegalArgumentException - if r, g or b are outside of the range 0 to 255, inclusiveSee Also:getRed(), getGreen(), getBlue(), getRGB()

    • Color

      @ConstructorProperties(value={"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 componentg - the green componentb - the blue componenta - the alpha component Throws: IllegalArgumentException - if r, g, b or a are outside of the range 0 to 255, inclusiveSee Also:getRed(), getGreen(), getBlue(), getAlpha(), getRGB()

    • Color

      public 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 componentsSee Also:ColorModel.getRGBdefault(), getRed(), getGreen(), getBlue(), getRGB()

    • Color

      public 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 the hasalpha argument is false, alpha is defaulted to 255. Parameters:rgba - the combined RGBA componentshasalpha - true if the alpha bits are valid; false otherwiseSee Also:ColorModel.getRGBdefault(), getRed(), getGreen(), getBlue(), getAlpha(), getRGB()

    • Color

      public 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 componentg - the green componentb - the blue component Throws: IllegalArgumentException - if r, g or b are outside of the range 0.0 to 1.0, inclusiveSee Also:getRed(), getGreen(), getBlue(), getRGB()

    • Color

      public 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 componentg - the green componentb - the blue componenta - the alpha component Throws: IllegalArgumentException - if r, g b or a are outside of the range 0.0 to 1.0, inclusiveSee Also:getRed(), getGreen(), getBlue(), getAlpha(), getRGB()

    • Color

      public Color(ColorSpace cspace, float[] components, float alpha) Creates a color in the specified 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. Parameters:cspace - the ColorSpace to be used to interpret the componentscomponents - an arbitrary number of color components that is compatible with the ColorSpacealpha - alpha value Throws: IllegalArgumentException - if any of the values in the components array or alpha is outside of the range 0.0 to 1.0See Also:getComponents(float[]), getColorComponents(float[])

  • Method Detail

    • getRed

      public int getRed() Returns the red component in the range 0-255 in the default sRGB space. Returns:the red component.See Also:getRGB()

    • getGreen

      public int getGreen() Returns the green component in the range 0-255 in the default sRGB space. Returns:the green component.See Also:getRGB()

    • getBlue

      public int getBlue() Returns the blue component in the range 0-255 in the default sRGB space. Returns:the blue component.See Also:getRGB()

    • getAlpha

      public int getAlpha() Returns the alpha component in the range 0-255. Returns:the alpha component.See Also:getRGB()

    • getRGB

      public int getRGB() Returns the RGB value representing the color in the default sRGB ColorModel. (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: JDK1.0 See Also:ColorModel.getRGBdefault(), getRed(), getGreen(), getBlue()

    • brighter

      public Color brighter() Creates a new 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. The alpha value is preserved. 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. Returns:a new Color object that is a brighter version of this Color with the same alpha value.Since: JDK1.0 See Also:darker()

    • darker

      public Color darker() Creates a new 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. The alpha value is preserved. 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. Returns:a new Color object that is a darker version of this Color with the same alpha value.Since: JDK1.0 See Also:brighter()

    • hashCode

      public int hashCode() Computes the hash code for this Color. Overrides: hashCode in class Object Returns:a hash code value for this object.Since: JDK1.0 See Also:Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)

    • equals

      public boolean equals(Object obj) Determines whether another object is equal to this 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. Overrides: equals in class Object Parameters:obj - the object to test for equality with this Color Returns:true if the objects are the same; false otherwise.Since: JDK1.0 See Also:Object.hashCode(), HashMap

    • toString

      public String toString() Returns a string representation of this 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. Overrides: toString in class Object Returns:a string representation of this Color.

    • decode

      public static Color decode(String nm) throws NumberFormatException Converts a String to an integer and returns the specified opaque Color. This method handles string formats that are used to represent octal and hexadecimal numbers. Parameters:nm - a String that represents an opaque color as a 24-bit integer Returns:the new Color object. Throws: NumberFormatException - if the specified string cannot be interpreted as a decimal, octal, or hexadecimal integer.Since: JDK1.1 See Also:Integer.decode(java.lang.String)

    • getColor

      public 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 Color object.

      If the specified property is not found or could not be parsed as an integer then null is returned. Parameters:nm - the name of the color property Returns:the Color converted from the system property.Since: JDK1.0 See Also:System.getProperty(java.lang.String), Integer.getInteger(java.lang.String), Color(int)

    • getColor

      public 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 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. Parameters:nm - the name of the color propertyv - the default Color Returns:the Color converted from the system property, or the specified Color.Since: JDK1.0 See Also:System.getProperty(java.lang.String), Integer.getInteger(java.lang.String), Color(int)

    • getColor

      public 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 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. Parameters:nm - the name of the color propertyv - the default color value, as an integer Returns:the Color converted from the system property or the Color converted from the specified integer.Since: JDK1.0 See Also:System.getProperty(java.lang.String), Integer.getInteger(java.lang.String), Color(int)

    • HSBtoRGB

      public 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 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 getRGB. This integer can be supplied as an argument to the Color constructor that takes a single integer argument. Parameters:hue - the hue component of the colorsaturation - the saturation of the colorbrightness - the brightness of the color Returns:the RGB value of the color with the indicated hue, saturation, and brightness.Since: JDK1.0 See Also:getRGB(), Color(int), ColorModel.getRGBdefault()

    • RGBtoHSB

      public 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 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. Parameters: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 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: JDK1.0 See Also:getRGB(), Color(int), ColorModel.getRGBdefault()

    • getHSBColor

      public static Color getHSBColor(float h, float s, float b) Creates a 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. Parameters:h - the hue components - the saturation of the colorb - the brightness of the color Returns:a Color object with the specified hue, saturation, and brightness.Since: JDK1.0

    • getRGBComponents

      public float[] getRGBComponents(float[] compArray) Returns a 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. Parameters:compArray - an array that this method fills with color and alpha components and returns Returns:the RGBA components in a float array.

    • getRGBColorComponents

      public float[] getRGBColorComponents(float[] compArray) Returns a 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. Parameters:compArray - an array that this method fills with color components and returns Returns:the RGB components in a float array.

    • getComponents

      public float[] getComponents(float[] compArray) Returns a 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. Parameters:compArray - an array that this method fills with the color and alpha components of this Color in its ColorSpace and returns Returns:the color and alpha components in a float array.

    • getColorComponents

      public float[] getColorComponents(float[] compArray) Returns a 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. Parameters:compArray - an array that this method fills with the color components of this Color in its ColorSpace and returns Returns:the color components in a float array.

    • getComponents

      public float[] getComponents(ColorSpace cspace, float[] compArray) Returns a 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. Parameters:cspace - a specified ColorSpacecompArray - an array that this method fills with the color and alpha components of this Color in the specified ColorSpace and returns Returns:the color and alpha components in a float array.

    • getColorComponents

      public float[] getColorComponents(ColorSpace cspace, float[] compArray) Returns a 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. Parameters:cspace - a specified ColorSpacecompArray - an array that this method fills with the color components of this Color in the specified ColorSpace Returns:the color components in a float array.

    • getColorSpace

      public ColorSpace getColorSpace() Returns the ColorSpace of this Color. Returns:this Color object's ColorSpace.

    • createContext

      public PaintContext createContext(ColorModel cm, Rectangle r, Rectangle2D r2d, AffineTransform xform, RenderingHints hints) Creates and returns a PaintContext used to generate a solid color field pattern. See the specification of the method in the Paint interface for information on null parameter handling. Specified by: createContext in interface Paint Parameters:cm - the preferred ColorModel which represents the most convenient format for the caller to receive the pixel data, or null if 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 AffineTransform from user space into device space.hints - the set of hints that the context object can use to choose between rendering alternatives. Returns:the PaintContext for generating color patterns.See Also:Paint, PaintContext, ColorModel, Rectangle, Rectangle2D, AffineTransform, RenderingHints

    • getTransparency

      public int getTransparency() Returns the transparency mode for this Color. This is required to implement the Paint interface. Specified by: getTransparency in interface Transparency Returns:this Color object'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)

• Overview
• Package
• Class
• Use
• Tree
• Deprecated
• Index
• Help

Java™ PlatformStandard Ed. 7

• Prev Class
• Next Class

• Frames
• No Frames

• All Classes

• Summary:
• Nested |
• Field |
• Constr |
• Method

• Detail:
• Field |
• Constr |
• Method

Submit a bug or feature For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples. Copyright © 1993, 2020, Oracle and/or its affiliates. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.