TextAttribute

java.lang.Object
- java.text.AttributedCharacterIterator.Attribute
- - java.awt.font.TextAttribute

所有已实现的接口:: Serializable

public final class TextAttribute
extends AttributedCharacterIterator.Attribute

The TextAttribute class defines attribute keys and attribute values used for text rendering.

TextAttribute instances are used as attribute keys to identify attributes in Font, TextLayout, AttributedCharacterIterator, and other classes handling text attributes. Other constants defined in this class can be used as attribute values.

For each text attribute, the documentation provides:

the type of its value,
the relevant predefined constants, if any
the default effect if the attribute is absent
the valid values if there are limitations
a description of the effect.

Values

The values of attributes must always be immutable.
Where value limitations are given, any value outside of that set is reserved for future use; the value will be treated as the default.
The value null is treated the same as the default value and results in the default behavior.
If the value is not of the proper type, the attribute will be ignored.
The identity of the value does not matter, only the actual value. For example, TextAttribute.WEIGHT_BOLD and new Float(2.0) indicate the same WEIGHT.
Attribute values of type Number (used for WEIGHT, WIDTH, POSTURE, SIZE, JUSTIFICATION, and TRACKING) can vary along their natural range and are not restricted to the predefined constants. Number.floatValue() is used to get the actual value from the Number.
The values for WEIGHT, WIDTH, and POSTURE are interpolated by the system, which can select the 'nearest available' font or use other techniques to approximate the user's request.

Summary of attributes

Key	Value Type	Principal Constants	Default Value
`FAMILY`	String	See Font `DIALOG`, `DIALOG_INPUT`, `SERIF`, `SANS_SERIF`, and `MONOSPACED`.	"Default" (use platform default)
`WEIGHT`	Number	WEIGHT_REGULAR, WEIGHT_BOLD	WEIGHT_REGULAR
`WIDTH`	Number	WIDTH_CONDENSED, WIDTH_REGULAR, WIDTH_EXTENDED	WIDTH_REGULAR
`POSTURE`	Number	POSTURE_REGULAR, POSTURE_OBLIQUE	POSTURE_REGULAR
`SIZE`	Number	none	12.0
`TRANSFORM`	`TransformAttribute`	See TransformAttribute `TransformAttribute#IDENTITY`	TransformAttribute.IDENTITY
`SUPERSCRIPT`	Integer	SUPERSCRIPT_SUPER, SUPERSCRIPT_SUB	0 (use the standard glyphs and metrics)
`FONT`	`Font`	none	null (do not override font resolution)
`CHAR_REPLACEMENT`	`GraphicAttribute`	none	null (draw text using font glyphs)
`FOREGROUND`	`Paint`	none	null (use current graphics paint)
`BACKGROUND`	`Paint`	none	null (do not render background)
`UNDERLINE`	Integer	UNDERLINE_ON	-1 (do not render underline)
`STRIKETHROUGH`	Boolean	STRIKETHROUGH_ON	false (do not render strikethrough)
`RUN_DIRECTION`	Boolean	RUN_DIRECTION_LTR RUN_DIRECTION_RTL	null (use `Bidi` standard default)
`BIDI_EMBEDDING`	Integer	none	0 (use base line direction)
`JUSTIFICATION`	Number	JUSTIFICATION_FULL	JUSTIFICATION_FULL
`INPUT_METHOD_HIGHLIGHT`	`InputMethodHighlight`, `Annotation`	(see class)	null (do not apply input highlighting)
`INPUT_METHOD_UNDERLINE`	Integer	UNDERLINE_LOW_ONE_PIXEL, UNDERLINE_LOW_TWO_PIXEL	-1 (do not render underline)
`SWAP_COLORS`	Boolean	SWAP_COLORS_ON	false (do not swap colors)
`NUMERIC_SHAPING`	`NumericShaper`	none	null (do not shape digits)
`KERNING`	Integer	KERNING_ON	0 (do not request kerning)
`LIGATURES`	Integer	LIGATURES_ON	0 (do not form optional ligatures)
`TRACKING`	Number	TRACKING_LOOSE, TRACKING_TIGHT	0 (do not add tracking)

另请参阅:: Font, TextLayout, AttributedCharacterIterator, 序列化表格

字段概要

字段
限定符和类型	字段	说明
`static TextAttribute`	`BACKGROUND`	Attribute key for the paint used to render the background of the text.
`static TextAttribute`	`BIDI_EMBEDDING`	Attribute key for the embedding level of the text.
`static TextAttribute`	`CHAR_REPLACEMENT`	Attribute key for a user-defined glyph to display in lieu of the font's standard glyph for a character.
`static TextAttribute`	`FAMILY`	Attribute key for the font name.
`static TextAttribute`	`FONT`	Attribute key used to provide the font to use to render text.
`static TextAttribute`	`FOREGROUND`	Attribute key for the paint used to render the text.
`static TextAttribute`	`INPUT_METHOD_HIGHLIGHT`	Attribute key for input method highlight styles.
`static TextAttribute`	`INPUT_METHOD_UNDERLINE`	Attribute key for input method underlines.
`static TextAttribute`	`JUSTIFICATION`	Attribute key for the justification of a paragraph.
`static Float`	`JUSTIFICATION_FULL`	Justify the line to the full requested width.
`static Float`	`JUSTIFICATION_NONE`	Do not allow the line to be justified.
`static TextAttribute`	`KERNING`	Attribute key to request kerning.
`static Integer`	`KERNING_ON`	Request standard kerning.
`static TextAttribute`	`LIGATURES`	Attribute key for enabling optional ligatures.
`static Integer`	`LIGATURES_ON`	Request standard optional ligatures.
`static TextAttribute`	`NUMERIC_SHAPING`	Attribute key for converting ASCII decimal digits to other decimal ranges.
`static TextAttribute`	`POSTURE`	Attribute key for the posture of a font.
`static Float`	`POSTURE_OBLIQUE`	The standard italic posture.
`static Float`	`POSTURE_REGULAR`	The standard posture, upright.
`static TextAttribute`	`RUN_DIRECTION`	Attribute key for the run direction of the line.
`static Boolean`	`RUN_DIRECTION_LTR`	Left-to-right run direction.
`static Boolean`	`RUN_DIRECTION_RTL`	Right-to-left run direction.
`static TextAttribute`	`SIZE`	Attribute key for the font size.
`static TextAttribute`	`STRIKETHROUGH`	Attribute key for strikethrough.
`static Boolean`	`STRIKETHROUGH_ON`	A single strikethrough.
`static TextAttribute`	`SUPERSCRIPT`	Attribute key for superscripting and subscripting.
`static Integer`	`SUPERSCRIPT_SUB`	Standard subscript.
`static Integer`	`SUPERSCRIPT_SUPER`	Standard superscript.
`static TextAttribute`	`SWAP_COLORS`	Attribute key for swapping foreground and background `Paints`.
`static Boolean`	`SWAP_COLORS_ON`	Swap foreground and background.
`static TextAttribute`	`TRACKING`	Attribute key to control tracking.
`static Float`	`TRACKING_LOOSE`	Perform loose tracking.
`static Float`	`TRACKING_TIGHT`	Perform tight tracking.
`static TextAttribute`	`TRANSFORM`	Attribute key for the transform of a font.
`static TextAttribute`	`UNDERLINE`	Attribute key for underline.
`static Integer`	`UNDERLINE_LOW_DASHED`	Single pixel dashed low underline.
`static Integer`	`UNDERLINE_LOW_DOTTED`	Single pixel dotted low underline.
`static Integer`	`UNDERLINE_LOW_GRAY`	Double pixel gray low underline.
`static Integer`	`UNDERLINE_LOW_ONE_PIXEL`	Single pixel solid low underline.
`static Integer`	`UNDERLINE_LOW_TWO_PIXEL`	Double pixel solid low underline.
`static Integer`	`UNDERLINE_ON`	Standard underline.
`static TextAttribute`	`WEIGHT`	Attribute key for the weight of a font.
`static Float`	`WEIGHT_BOLD`	The standard bold weight.
`static Float`	`WEIGHT_DEMIBOLD`	A moderately lighter weight than `WEIGHT_BOLD`.
`static Float`	`WEIGHT_DEMILIGHT`	An intermediate weight between `WEIGHT_LIGHT` and `WEIGHT_STANDARD`.
`static Float`	`WEIGHT_EXTRA_LIGHT`	The lightest predefined weight.
`static Float`	`WEIGHT_EXTRABOLD`	An extra heavy weight.
`static Float`	`WEIGHT_HEAVY`	A moderately heavier weight than `WEIGHT_BOLD`.
`static Float`	`WEIGHT_LIGHT`	The standard light weight.
`static Float`	`WEIGHT_MEDIUM`	An intermediate weight between `WEIGHT_REGULAR` and `WEIGHT_BOLD`.
`static Float`	`WEIGHT_REGULAR`	The standard weight.
`static Float`	`WEIGHT_SEMIBOLD`	A moderately heavier weight than `WEIGHT_REGULAR`.
`static Float`	`WEIGHT_ULTRABOLD`	The heaviest predefined weight.
`static TextAttribute`	`WIDTH`	Attribute key for the width of a font.
`static Float`	`WIDTH_CONDENSED`	The most condensed predefined width.
`static Float`	`WIDTH_EXTENDED`	The most extended predefined width.
`static Float`	`WIDTH_REGULAR`	The standard width.
`static Float`	`WIDTH_SEMI_CONDENSED`	A moderately condensed width.
`static Float`	`WIDTH_SEMI_EXTENDED`	A moderately extended width.

从类继承的字段 java.text.AttributedCharacterIterator.Attribute
INPUT_METHOD_SEGMENT, LANGUAGE, READING

构造器概要

构造器
限定符构造器说明

protected TextAttribute(String name)
Constructs a TextAttribute with the specified name.

构造器
限定符	构造器	说明
`protected`	`TextAttribute(String name)`	Constructs a `TextAttribute` with the specified name.

方法概要

所有方法实例方法具体方法
限定符和类型方法说明

protected Object readResolve()
Resolves instances being deserialized to the predefined constants.
- 从类继承的方法 java.text.AttributedCharacterIterator.Attribute
  equals, getName, hashCode, toString
- 从类继承的方法 java.lang.Object
  clone, finalize, getClass, notify, notifyAll, wait, wait, wait

所有方法实例方法具体方法
限定符和类型	方法	说明
`protected Object`	`readResolve()`	Resolves instances being deserialized to the predefined constants.

- 字段详细资料
  - BACKGROUND
```
public static final TextAttribute BACKGROUND
```
    Attribute key for the paint used to render the background of the text. Values are instances of Paint. The default value is null, indicating that the background should not be rendered.
    The logical bounds of the text will be filled using this Paint, and then the text will be rendered on top of it (but see SWAP_COLORS).
    The visual bounds of the text is extended to include the logical bounds, if necessary. The outline is not affected.
    
    另请参阅:
    
    Paint, SWAP_COLORS
  - BIDI_EMBEDDING
```
public static final TextAttribute BIDI_EMBEDDING
```
    Attribute key for the embedding level of the text. Values are instances of Integer. The default value is null, indicating that the the Bidirectional algorithm should run without explicit embeddings.
    Positive values 1 through 61 are embedding levels, negative values -1 through -61 are override levels. The value 0 means that the base line direction is used. These levels are passed in the embedding levels array to the Bidi constructor.
    Note: When this attribute is present anywhere in a paragraph, then any Unicode bidi control characters (RLO, LRO, RLE, LRE, and PDF) in the paragraph are disregarded, and runs of text where this attribute is not present are treated as though it were present and had the value 0.
    
    另请参阅:
    
    Bidi
  - CHAR_REPLACEMENT
```
public static final TextAttribute CHAR_REPLACEMENT
```
    Attribute key for a user-defined glyph to display in lieu of the font's standard glyph for a character. Values are intances of GraphicAttribute. The default value is null, indicating that the standard glyphs provided by the font should be used.
    This attribute is used to reserve space for a graphic or other component embedded in a line of text. It is required for correct positioning of 'inline' components within a line when bidirectional reordering (see Bidi) is performed. Each character (Unicode code point) will be rendered using the provided GraphicAttribute. Typically, the characters to which this attribute is applied should be \uFFFC.
    The GraphicAttribute determines the logical and visual bounds of the text; the actual Font values are ignored.
    
    另请参阅:
    
    GraphicAttribute
  - FAMILY
```
public static final TextAttribute FAMILY
```
    Attribute key for the font name. Values are instances of String. The default value is "Default", which causes the platform default font family to be used.
    The Font class defines constants for the logical font names DIALOG, DIALOG_INPUT, SANS_SERIF, SERIF, and MONOSPACED.
    This defines the value passed as name to the Font constructor. Both logical and physical font names are allowed. If a font with the requested name is not found, the default font is used.
    Note: This attribute is unfortunately misnamed, as it specifies the face name and not just the family. Thus values such as "Lucida Sans Bold" will select that face if it exists. Note, though, that if the requested face does not exist, the default will be used with regular weight. The "Bold" in the name is part of the face name, not a separate request that the font's weight be bold.
  - FONT
```
public static final TextAttribute FONT
```
    Attribute key used to provide the font to use to render text. Values are instances of Font. The default value is null, indicating that normal resolution of a Font from attributes should be performed.
    TextLayout and AttributedCharacterIterator work in terms of Maps of TextAttributes. Normally, all the attributes are examined and used to select and configure a Font instance. If a FONT attribute is present, though, its associated Font will be used. This provides a way for users to override the resolution of font attributes into a Font, or force use of a particular Font instance. This also allows users to specify subclasses of Font in cases where a Font can be subclassed.
    FONT is used for special situations where clients already have a Font instance but still need to use Map-based APIs. Typically, there will be no other attributes in the Map except the FONT attribute. With Map-based APIs the common case is to specify all attributes individually, so FONT is not needed or desireable.
    However, if both FONT and other attributes are present in the Map, the rendering system will merge the attributes defined in the Font with the additional attributes. This merging process classifies TextAttributes into two groups. One group, the 'primary' group, is considered fundamental to the selection and metric behavior of a font. These attributes are FAMILY, WEIGHT, WIDTH, POSTURE, SIZE, TRANSFORM, SUPERSCRIPT, and TRACKING. The other group, the 'secondary' group, consists of all other defined attributes, with the exception of FONT itself.
    To generate the new Map, first the Font is obtained from the FONT attribute, and all of its attributes extracted into a new Map. Then only the secondary attributes from the original Map are added to those in the new Map. Thus the values of primary attributes come solely from the Font, and the values of secondary attributes originate with the Font but can be overridden by other values in the Map.
    Note:Font's Map-based constructor and deriveFont methods do not process the FONT attribute, as these are used to create new Font objects. Instead, Font.getFont(Map) should be used to handle the FONT attribute.
    
    另请参阅:
    
    Font
  - FOREGROUND
```
public static final TextAttribute FOREGROUND
```
    Attribute key for the paint used to render the text. Values are instances of Paint. The default value is null, indicating that the Paint set on the Graphics2D at the time of rendering is used.
    Glyphs will be rendered using this Paint regardless of the Paint value set on the Graphics (but see SWAP_COLORS).
    
    另请参阅:
    
    Paint, SWAP_COLORS
  - INPUT_METHOD_HIGHLIGHT
```
public static final TextAttribute INPUT_METHOD_HIGHLIGHT
```
    Attribute key for input method highlight styles.
    Values are instances of InputMethodHighlight or Annotation. The default value is null, which means that input method styles should not be applied before rendering.
    If adjacent runs of text with the same InputMethodHighlight need to be rendered separately, the InputMethodHighlights should be wrapped in Annotation instances.
    Input method highlights are used while text is being composed by an input method. Text editing components should retain them even if they generally only deal with unstyled text, and make them available to the drawing routines.
    
    另请参阅:
    
    Font, InputMethodHighlight, Annotation
  - INPUT_METHOD_UNDERLINE
```
public static final TextAttribute INPUT_METHOD_UNDERLINE
```
    Attribute key for input method underlines. Values are instances of Integer. The default value is -1, which means no underline.
    Several constant values are provided, see UNDERLINE_LOW_ONE_PIXEL, UNDERLINE_LOW_TWO_PIXEL, UNDERLINE_LOW_DOTTED, UNDERLINE_LOW_GRAY, and UNDERLINE_LOW_DASHED.
    This may be used in conjunction with UNDERLINE if desired. The primary purpose is for use by input methods. Other use of these underlines for simple ornamentation might confuse users.
    The input method underline affects both the visual bounds and the outline of the text.
    
    从以下版本开始:
    
    1.3
  - JUSTIFICATION
```
public static final TextAttribute JUSTIFICATION
```
    Attribute key for the justification of a paragraph. Values are instances of Number. The default value is 1, indicating that justification should use the full width provided. Values are pinned to the range [0..1].
    The constants JUSTIFICATION_FULL and JUSTIFICATION_NONE are provided.
    Specifies the fraction of the extra space to use when justification is requested on a TextLayout. For example, if the line is 50 points wide and it is requested to justify to 70 points, a value of 0.75 will pad to use three-quarters of the remaining space, or 15 points, so that the resulting line will be 65 points in length.
    Note: This should have the same value for all the text in a paragraph, otherwise the behavior is undetermined.
    
    另请参阅:
    
    TextLayout.getJustifiedLayout(float)
  - JUSTIFICATION_FULL
```
public static final Float JUSTIFICATION_FULL
```
    Justify the line to the full requested width. This is the default value for JUSTIFICATION.
    
    另请参阅:
    
    JUSTIFICATION
  - JUSTIFICATION_NONE
```
public static final Float JUSTIFICATION_NONE
```
    Do not allow the line to be justified.
    
    另请参阅:
    
    JUSTIFICATION
  - KERNING
```
public static final TextAttribute KERNING
```
    Attribute key to request kerning. Values are instances of Integer. The default value is 0, which does not request kerning.
    The constant value KERNING_ON is provided.
    The default advances of single characters are not appropriate for some character sequences, for example "To" or "AWAY". Without kerning the adjacent characters appear to be separated by too much space. Kerning causes selected sequences of characters to be spaced differently for a more pleasing visual appearance.
    
    从以下版本开始:
    
    1.6
  - KERNING_ON
```
public static final Integer KERNING_ON
```
    Request standard kerning.
    
    从以下版本开始:
    
    1.6
    
    另请参阅:
    
    KERNING
  - LIGATURES
```
public static final TextAttribute LIGATURES
```
    Attribute key for enabling optional ligatures. Values are instances of Integer. The default value is 0, which means do not use optional ligatures.
    The constant value LIGATURES_ON is defined.
    Ligatures required by the writing system are always enabled.
    
    从以下版本开始:
    
    1.6
  - LIGATURES_ON
```
public static final Integer LIGATURES_ON
```
    Request standard optional ligatures.
    
    从以下版本开始:
    
    1.6
    
    另请参阅:
    
    LIGATURES
  - NUMERIC_SHAPING
```
public static final TextAttribute NUMERIC_SHAPING
```
    Attribute key for converting ASCII decimal digits to other decimal ranges. Values are instances of NumericShaper. The default is null, which means do not perform numeric shaping.
    When a numeric shaper is defined, the text is first processed by the shaper before any other analysis of the text is performed.
    Note: This should have the same value for all the text in the paragraph, otherwise the behavior is undetermined.
    
    从以下版本开始:
    
    1.4
    
    另请参阅:
    
    NumericShaper
  - POSTURE
```
public static final TextAttribute POSTURE
```
    Attribute key for the posture of a font. Values are instances of Number. The default value is POSTURE_REGULAR.
    Two constant values are provided, POSTURE_REGULAR and POSTURE_OBLIQUE. The value POSTURE_OBLIQUE corresponds to the style value Font.ITALIC as passed to the Font constructor.
    The value is roughly the slope of the stems of the font, expressed as the run over the rise. Positive values lean right.
    The system can interpolate the provided value.
    This will affect the font's italic angle as returned by Font.getItalicAngle.
    
    另请参阅:
    
    Font.getItalicAngle()
  - POSTURE_OBLIQUE
```
public static final Float POSTURE_OBLIQUE
```
    The standard italic posture.
    
    另请参阅:
    
    POSTURE
  - POSTURE_REGULAR
```
public static final Float POSTURE_REGULAR
```
    The standard posture, upright. This is the default value for POSTURE.
    
    另请参阅:
    
    POSTURE
  - RUN_DIRECTION
```
public static final TextAttribute RUN_DIRECTION
```
    Attribute key for the run direction of the line. Values are instances of Boolean. The default value is null, which indicates that the standard Bidi algorithm for determining run direction should be used with the value Bidi.DIRECTION_DEFAULT_LEFT_TO_RIGHT.
    The constants RUN_DIRECTION_RTL and RUN_DIRECTION_LTR are provided.
    This determines the value passed to the Bidi constructor to select the primary direction of the text in the paragraph.
    Note: This attribute should have the same value for all the text in a paragraph, otherwise the behavior is undetermined.
    
    另请参阅:
    
    Bidi
  - RUN_DIRECTION_LTR
```
public static final Boolean RUN_DIRECTION_LTR
```
    Left-to-right run direction.
    
    另请参阅:
    
    RUN_DIRECTION
  - RUN_DIRECTION_RTL
```
public static final Boolean RUN_DIRECTION_RTL
```
    Right-to-left run direction.
    
    另请参阅:
    
    RUN_DIRECTION
  - SIZE
```
public static final TextAttribute SIZE
```
    Attribute key for the font size. Values are instances of Number. The default value is 12pt.
    This corresponds to the size parameter to the Font constructor.
    Very large or small sizes will impact rendering performance, and the rendering system might not render text at these sizes. Negative sizes are illegal and result in the default size.
    Note that the appearance and metrics of a 12pt font with a 2x transform might be different than that of a 24 point font with no transform.
  - STRIKETHROUGH
```
public static final TextAttribute STRIKETHROUGH
```
    Attribute key for strikethrough. Values are instances of Boolean. The default value is false, which means no strikethrough.
    The constant value STRIKETHROUGH_ON is provided.
    The strikethrough affects both the visual bounds and the outline of the text.
  - STRIKETHROUGH_ON
```
public static final Boolean STRIKETHROUGH_ON
```
    A single strikethrough.
    
    另请参阅:
    
    STRIKETHROUGH
  - SUPERSCRIPT
```
public static final TextAttribute SUPERSCRIPT
```
    Attribute key for superscripting and subscripting. Values are instances of Integer. The default value is 0, which means that no superscript or subscript is used.
    Two constant values are provided, see SUPERSCRIPT_SUPER and SUPERSCRIPT_SUB. These have the values 1 and -1 respectively. Values of greater magnitude define greater levels of superscript or subscripting, for example, 2 corresponds to super-superscript, 3 to super-super-superscript, and similarly for negative values and subscript, up to a level of 7 (or -7). Values beyond this range are reserved; behavior is platform-dependent.
    SUPERSCRIPT can impact the ascent and descent of a font. The ascent and descent can never become negative, however.
  - SUPERSCRIPT_SUB
```
public static final Integer SUPERSCRIPT_SUB
```
    Standard subscript.
    
    另请参阅:
    
    SUPERSCRIPT
  - SUPERSCRIPT_SUPER
```
public static final Integer SUPERSCRIPT_SUPER
```
    Standard superscript.
    
    另请参阅:
    
    SUPERSCRIPT
  - SWAP_COLORS
```
public static final TextAttribute SWAP_COLORS
```
    Attribute key for swapping foreground and background Paints. Values are instances of Boolean. The default value is false, which means do not swap colors.
    The constant value SWAP_COLORS_ON is defined.
    If the FOREGROUND attribute is set, its Paint will be used as the background, otherwise the Paint currently on the Graphics will be used. If the BACKGROUND attribute is set, its Paint will be used as the foreground, otherwise the system will find a contrasting color to the (resolved) background so that the text will be visible.
    
    另请参阅:
    
    FOREGROUND, BACKGROUND
  - SWAP_COLORS_ON
```
public static final Boolean SWAP_COLORS_ON
```
    Swap foreground and background.
    
    从以下版本开始:
    
    1.3
    
    另请参阅:
    
    SWAP_COLORS
  - TRACKING
```
public static final TextAttribute TRACKING
```
    Attribute key to control tracking. Values are instances of Number. The default value is 0, which means no additional tracking.
    The constant values TRACKING_TIGHT and TRACKING_LOOSE are provided.
    The tracking value is multiplied by the font point size and passed through the font transform to determine an additional amount to add to the advance of each glyph cluster. Positive tracking values will inhibit formation of optional ligatures. Tracking values are typically between -0.1 and 0.3; values outside this range are generally not desireable.
    
    从以下版本开始:
    
    1.6
  - TRACKING_LOOSE
```
public static final Float TRACKING_LOOSE
```
    Perform loose tracking.
    
    从以下版本开始:
    
    1.6
    
    另请参阅:
    
    TRACKING
  - TRACKING_TIGHT
```
public static final Float TRACKING_TIGHT
```
    Perform tight tracking.
    
    从以下版本开始:
    
    1.6
    
    另请参阅:
    
    TRACKING
  - TRANSFORM
```
public static final TextAttribute TRANSFORM
```
    Attribute key for the transform of a font. Values are instances of TransformAttribute. The default value is TransformAttribute.IDENTITY.
    The TransformAttribute class defines the constant TransformAttribute#IDENTITY.
    This corresponds to the transform passed to Font.deriveFont(AffineTransform). Since that transform is mutable and TextAttribute values must not be, the TransformAttribute wrapper class is used.
    The primary intent is to support scaling and skewing, though other effects are possible.
    
    Some transforms will cause the baseline to be rotated and/or shifted. The text and the baseline are transformed together so that the text follows the new baseline. For example, with text on a horizontal baseline, the new baseline follows the direction of the unit x vector passed through the transform. Text metrics are measured against this new baseline. So, for example, with other things being equal, text rendered with a rotated TRANSFORM and an unrotated TRANSFORM will measure as having the same ascent, descent, and advance.
    
    In styled text, the baselines for each such run are aligned one after the other to potentially create a non-linear baseline for the entire run of text. For more information, see TextLayout#getLayoutPath.
    
    另请参阅:
    
    TransformAttribute, AffineTransform
  - UNDERLINE
```
public static final TextAttribute UNDERLINE
```
    Attribute key for underline. Values are instances of Integer. The default value is -1, which means no underline.
    The constant value UNDERLINE_ON is provided.
    The underline affects both the visual bounds and the outline of the text.
  - UNDERLINE_LOW_DASHED
```
public static final Integer UNDERLINE_LOW_DASHED
```
    Single pixel dashed low underline.
    
    从以下版本开始:
    
    1.3
    
    另请参阅:
    
    INPUT_METHOD_UNDERLINE
  - UNDERLINE_LOW_DOTTED
```
public static final Integer UNDERLINE_LOW_DOTTED
```
    Single pixel dotted low underline.
    
    从以下版本开始:
    
    1.3
    
    另请参阅:
    
    INPUT_METHOD_UNDERLINE
  - UNDERLINE_LOW_GRAY
```
public static final Integer UNDERLINE_LOW_GRAY
```
    Double pixel gray low underline.
    
    从以下版本开始:
    
    1.3
    
    另请参阅:
    
    INPUT_METHOD_UNDERLINE
  - UNDERLINE_LOW_ONE_PIXEL
```
public static final Integer UNDERLINE_LOW_ONE_PIXEL
```
    Single pixel solid low underline.
    
    从以下版本开始:
    
    1.3
    
    另请参阅:
    
    INPUT_METHOD_UNDERLINE
  - UNDERLINE_LOW_TWO_PIXEL
```
public static final Integer UNDERLINE_LOW_TWO_PIXEL
```
    Double pixel solid low underline.
    
    从以下版本开始:
    
    1.3
    
    另请参阅:
    
    INPUT_METHOD_UNDERLINE
  - UNDERLINE_ON
```
public static final Integer UNDERLINE_ON
```
    Standard underline.
    
    另请参阅:
    
    UNDERLINE
  - WEIGHT
```
public static final TextAttribute WEIGHT
```
    Attribute key for the weight of a font. Values are instances of Number. The default value is WEIGHT_REGULAR.
    Several constant values are provided, see WEIGHT_EXTRA_LIGHT, WEIGHT_LIGHT, WEIGHT_DEMILIGHT, WEIGHT_REGULAR, WEIGHT_SEMIBOLD, WEIGHT_MEDIUM, WEIGHT_DEMIBOLD, WEIGHT_BOLD, WEIGHT_HEAVY, WEIGHT_EXTRABOLD, and WEIGHT_ULTRABOLD. The value WEIGHT_BOLD corresponds to the style value Font.BOLD as passed to the Font constructor.
    The value is roughly the ratio of the stem width to that of the regular weight.
    The system can interpolate the provided value.
  - WEIGHT_BOLD
```
public static final Float WEIGHT_BOLD
```
    The standard bold weight.
    
    另请参阅:
    
    WEIGHT
  - WEIGHT_DEMIBOLD
```
public static final Float WEIGHT_DEMIBOLD
```
    A moderately lighter weight than WEIGHT_BOLD.
    
    另请参阅:
    
    WEIGHT
  - WEIGHT_DEMILIGHT
```
public static final Float WEIGHT_DEMILIGHT
```
    An intermediate weight between WEIGHT_LIGHT and WEIGHT_STANDARD.
    
    另请参阅:
    
    WEIGHT
  - WEIGHT_EXTRABOLD
```
public static final Float WEIGHT_EXTRABOLD
```
    An extra heavy weight.
    
    另请参阅:
    
    WEIGHT
  - WEIGHT_EXTRA_LIGHT
```
public static final Float WEIGHT_EXTRA_LIGHT
```
    The lightest predefined weight.
    
    另请参阅:
    
    WEIGHT
  - WEIGHT_HEAVY
```
public static final Float WEIGHT_HEAVY
```
    A moderately heavier weight than WEIGHT_BOLD.
    
    另请参阅:
    
    WEIGHT
  - WEIGHT_LIGHT
```
public static final Float WEIGHT_LIGHT
```
    The standard light weight.
    
    另请参阅:
    
    WEIGHT
  - WEIGHT_MEDIUM
```
public static final Float WEIGHT_MEDIUM
```
    An intermediate weight between WEIGHT_REGULAR and WEIGHT_BOLD.
    
    另请参阅:
    
    WEIGHT
  - WEIGHT_REGULAR
```
public static final Float WEIGHT_REGULAR
```
    The standard weight. This is the default value for WEIGHT.
    
    另请参阅:
    
    WEIGHT
  - WEIGHT_SEMIBOLD
```
public static final Float WEIGHT_SEMIBOLD
```
    A moderately heavier weight than WEIGHT_REGULAR.
    
    另请参阅:
    
    WEIGHT
  - WEIGHT_ULTRABOLD
```
public static final Float WEIGHT_ULTRABOLD
```
    The heaviest predefined weight.
    
    另请参阅:
    
    WEIGHT
  - WIDTH
```
public static final TextAttribute WIDTH
```
    Attribute key for the width of a font. Values are instances of Number. The default value is WIDTH_REGULAR.
    Several constant values are provided, see WIDTH_CONDENSED, WIDTH_SEMI_CONDENSED, WIDTH_REGULAR, WIDTH_SEMI_EXTENDED, WIDTH_EXTENDED.
    The value is roughly the ratio of the advance width to that of the regular width.
    The system can interpolate the provided value.
  - WIDTH_CONDENSED
```
public static final Float WIDTH_CONDENSED
```
    The most condensed predefined width.
    
    另请参阅:
    
    WIDTH
  - WIDTH_EXTENDED
```
public static final Float WIDTH_EXTENDED
```
    The most extended predefined width.
    
    另请参阅:
    
    WIDTH
  - WIDTH_REGULAR
```
public static final Float WIDTH_REGULAR
```
    The standard width. This is the default value for WIDTH.
    
    另请参阅:
    
    WIDTH
  - WIDTH_SEMI_CONDENSED
```
public static final Float WIDTH_SEMI_CONDENSED
```
    A moderately condensed width.
    
    另请参阅:
    
    WIDTH
  - WIDTH_SEMI_EXTENDED
```
public static final Float WIDTH_SEMI_EXTENDED
```
    A moderately extended width.
    
    另请参阅:
    
    WIDTH
- 构造器详细资料
  - TextAttribute
```
protected TextAttribute(String name)
```
    Constructs a TextAttribute with the specified name.
    
    参数:
    
    name - the attribute name to assign to this TextAttribute
- 方法详细资料
  - readResolve
```
protected Object readResolve()
                      throws InvalidObjectException
```
    Resolves instances being deserialized to the predefined constants.
    
    覆盖:
    
    readResolve 在类中 AttributedCharacterIterator.Attribute
    
    返回:
    
    the resolved Attribute object
    
    抛出:
    
    InvalidObjectException - if the object to resolve is not an instance of Attribute

类 TextAttribute

Values

Summary of attributes

字段概要

从类继承的字段 java.text.AttributedCharacterIterator.Attribute

构造器概要

方法概要

从类继承的方法 java.text.AttributedCharacterIterator.Attribute

从类继承的方法 java.lang.Object

字段详细资料

BACKGROUND

BIDI_EMBEDDING

CHAR_REPLACEMENT

FAMILY

FONT

FOREGROUND

INPUT_METHOD_HIGHLIGHT

INPUT_METHOD_UNDERLINE

JUSTIFICATION

JUSTIFICATION_FULL

JUSTIFICATION_NONE

KERNING

KERNING_ON

LIGATURES

LIGATURES_ON

NUMERIC_SHAPING

POSTURE

POSTURE_OBLIQUE

POSTURE_REGULAR

RUN_DIRECTION

RUN_DIRECTION_LTR

RUN_DIRECTION_RTL

SIZE

STRIKETHROUGH

STRIKETHROUGH_ON

SUPERSCRIPT

SUPERSCRIPT_SUB

SUPERSCRIPT_SUPER

SWAP_COLORS

SWAP_COLORS_ON

TRACKING

TRACKING_LOOSE

TRACKING_TIGHT

TRANSFORM

UNDERLINE

UNDERLINE_LOW_DASHED

UNDERLINE_LOW_DOTTED

UNDERLINE_LOW_GRAY

UNDERLINE_LOW_ONE_PIXEL

UNDERLINE_LOW_TWO_PIXEL

UNDERLINE_ON

WEIGHT

WEIGHT_BOLD

WEIGHT_DEMIBOLD

WEIGHT_DEMILIGHT

WEIGHT_EXTRABOLD

WEIGHT_EXTRA_LIGHT

WEIGHT_HEAVY

WEIGHT_LIGHT

WEIGHT_MEDIUM

WEIGHT_REGULAR

WEIGHT_SEMIBOLD

WEIGHT_ULTRABOLD

WIDTH

WIDTH_CONDENSED

WIDTH_EXTENDED

WIDTH_REGULAR

WIDTH_SEMI_CONDENSED

WIDTH_SEMI_EXTENDED

构造器详细资料

TextAttribute

方法详细资料

readResolve