Class Font

java.lang.Object
- java.awt.Font

All Implemented Interfaces:: Serializable

Direct Known Subclasses:: FontUIResource

public class Font
extends Object
implements Serializable

The Font class represents fonts, which are used to render text in a visible way. A font provides the information needed to map sequences of characters to sequences of glyphs and to render sequences of glyphs on Graphics and Component objects.

Characters and Glyphs

A character is a symbol that represents an item such as a letter, a digit, or punctuation in an abstract way. For example, 'g', LATIN SMALL LETTER G, is a character.

A glyph is a shape used to render a character or a sequence of characters. In simple writing systems, such as Latin, typically one glyph represents one character. In general, however, characters and glyphs do not have one-to-one correspondence. For example, the character 'á' LATIN SMALL LETTER A WITH ACUTE, can be represented by two glyphs: one for 'a' and one for '´'. On the other hand, the two-character string "fi" can be represented by a single glyph, an "fi" ligature. In complex writing systems, such as Arabic or the South and South-East Asian writing systems, the relationship between characters and glyphs can be more complicated and involve context-dependent selection of glyphs as well as glyph reordering. A font encapsulates the collection of glyphs needed to render a selected set of characters as well as the tables needed to map sequences of characters to corresponding sequences of glyphs.

Physical and Logical Fonts

The Java Platform distinguishes between two kinds of fonts: physical fonts and logical fonts.

Physical fonts are the actual font libraries containing glyph data and tables to map from character sequences to glyph sequences, using a font technology such as TrueType or PostScript Type 1. All implementations of the Java Platform must support TrueType fonts; support for other font technologies is implementation dependent. Physical fonts may use names such as Helvetica, Palatino, HonMincho, or any number of other font names. Typically, each physical font supports only a limited set of writing systems, for example, only Latin characters or only Japanese and Basic Latin. The set of available physical fonts varies between configurations. Applications that require specific fonts can bundle them and instantiate them using the createFont method.

Logical fonts are the five font families defined by the Java platform which must be supported by any Java runtime environment: Serif, SansSerif, Monospaced, Dialog, and DialogInput. These logical fonts are not actual font libraries. Instead, the logical font names are mapped to physical fonts by the Java runtime environment. The mapping is implementation and usually locale dependent, so the look and the metrics provided by them vary. Typically, each logical font name maps to several physical fonts in order to cover a large range of characters.

Peered AWT components, such as Label and TextField, can only use logical fonts.

For a discussion of the relative advantages and disadvantages of using physical or logical fonts, see the Physical and Logical Fonts in The Java Tutorials document.

Font Faces and Names

A Font can have many faces, such as heavy, medium, oblique, gothic and regular. All of these faces have similar typographic design.

There are three different names that you can get from a Font object. The logical font name is simply the name that was used to construct the font. The font face name, or just font name for short, is the name of a particular font face, like Helvetica Bold. The family name is the name of the font family that determines the typographic design across several faces, like Helvetica.

The Font class represents an instance of a font face from a collection of font faces that are present in the system resources of the host system. As examples, Arial Bold and Courier Bold Italic are font faces. There can be several Font objects associated with a font face, each differing in size, style, transform and font features.

Glyphs may not always be rendered with the requested properties (e.g, font and style) due to platform limitations such as the absence of suitable platform fonts to implement a logical font.

The getAllFonts method of the GraphicsEnvironment class returns an array of all font faces available in the system. These font faces are returned as Font objects with a size of 1, identity transform and default font features. These base fonts can then be used to derive new Font objects with varying sizes, styles, transforms and font features via the deriveFont methods in this class.

Font and TextAttribute

Font supports most TextAttributes. This makes some operations, such as rendering underlined text, convenient since it is not necessary to explicitly construct a TextLayout object. Attributes can be set on a Font by constructing or deriving it using a Map of TextAttribute values.

The values of some TextAttributes are not serializable, and therefore attempting to serialize an instance of Font that has such values will not serialize them. This means a Font deserialized from such a stream will not compare equal to the original Font that contained the non-serializable attributes. This should very rarely pose a problem since these attributes are typically used only in special circumstances and are unlikely to be serialized.

FOREGROUND and BACKGROUND use Paint values. The subclass Color is serializable, while GradientPaint and TexturePaint are not.
CHAR_REPLACEMENT uses GraphicAttribute values. The subclasses ShapeGraphicAttribute and ImageGraphicAttribute are not serializable.
INPUT_METHOD_HIGHLIGHT uses InputMethodHighlight values, which are not serializable. See InputMethodHighlight.

Clients who create custom subclasses of Paint and GraphicAttribute can make them serializable and avoid this problem. Clients who use input method highlights can convert these to the platform-specific attributes for that highlight on the current platform and set them on the Font as a workaround.

The Map-based constructor and deriveFont APIs ignore the FONT attribute, and it is not retained by the Font; the static getFont(java.util.Map<? extends java.text.AttributedCharacterIterator.Attribute, ?>) method should be used if the FONT attribute might be present. See TextAttribute.FONT for more information.

Several attributes will cause additional rendering overhead and potentially invoke layout. If a Font has such attributes, the hasLayoutAttributes() method will return true.

Note: Font rotations can cause text baselines to be rotated. In order to account for this (rare) possibility, font APIs are specified to return metrics and take parameters 'in baseline-relative coordinates'. This maps the 'x' coordinate to the advance along the baseline, (positive x is forward along the baseline), and the 'y' coordinate to a distance along the perpendicular to the baseline at 'x' (positive y is 90 degrees clockwise from the baseline vector). APIs for which this is especially important are called out as having 'baseline-relative coordinates.'

See Also:: Serialized Form

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`BOLD`	The bold style constant.
`static int`	`CENTER_BASELINE`	The baseline used in ideographic scripts like Chinese, Japanese, and Korean when laying out text.
`static String`	`DIALOG`	A String constant for the canonical family name of the logical font "Dialog".
`static String`	`DIALOG_INPUT`	A String constant for the canonical family name of the logical font "DialogInput".
`static int`	`HANGING_BASELINE`	The baseline used in Devanagari and similar scripts when laying out text.
`static int`	`ITALIC`	The italicized style constant.
`static int`	`LAYOUT_LEFT_TO_RIGHT`	A flag to layoutGlyphVector indicating that text is left-to-right as determined by Bidi analysis.
`static int`	`LAYOUT_NO_LIMIT_CONTEXT`	A flag to layoutGlyphVector indicating that text in the char array after the indicated limit should not be examined.
`static int`	`LAYOUT_NO_START_CONTEXT`	A flag to layoutGlyphVector indicating that text in the char array before the indicated start should not be examined.
`static int`	`LAYOUT_RIGHT_TO_LEFT`	A flag to layoutGlyphVector indicating that text is right-to-left as determined by Bidi analysis.
`static String`	`MONOSPACED`	A String constant for the canonical family name of the logical font "Monospaced".
`protected String`	`name`	The logical name of this `Font`, as passed to the constructor.
`static int`	`PLAIN`	The plain style constant.
`protected float`	`pointSize`	The point size of this `Font` in `float`.
`static int`	`ROMAN_BASELINE`	The baseline used in most Roman scripts when laying out text.
`static String`	`SANS_SERIF`	A String constant for the canonical family name of the logical font "SansSerif".
`static String`	`SERIF`	A String constant for the canonical family name of the logical font "Serif".
`protected int`	`size`	The point size of this `Font`, rounded to integer.
`protected int`	`style`	The style of this `Font`, as passed to the constructor.
`static int`	`TRUETYPE_FONT`	Identify a font resource of type TRUETYPE.
`static int`	`TYPE1_FONT`	Identify a font resource of type TYPE1.

Constructor Summary

Constructors
Modifier	Constructor	Description
`protected`	`Font(Font font)`	Creates a new `Font` from the specified `font`.
	`Font(String name, int style, int size)`	Creates a new `Font` from the specified name, style and point size.
	`Font(Map<? extends AttributedCharacterIterator.Attribute,?> attributes)`	Creates a new `Font` with the specified attributes.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`canDisplay(char c)`	Checks if this `Font` has a glyph for the specified character.
`boolean`	`canDisplay(int codePoint)`	Checks if this `Font` has a glyph for the specified character.
`int`	`canDisplayUpTo(char[] text, int start, int limit)`	Indicates whether or not this `Font` can display the characters in the specified `text` starting at `start` and ending at `limit`.
`int`	`canDisplayUpTo(String str)`	Indicates whether or not this `Font` can display a specified `String`.
`int`	`canDisplayUpTo(CharacterIterator iter, int start, int limit)`	Indicates whether or not this `Font` can display the text specified by the `iter` starting at `start` and ending at `limit`.
`static Font`	`createFont(int fontFormat, File fontFile)`	Returns a new `Font` using the specified font type and the specified font file.
`static Font`	`createFont(int fontFormat, InputStream fontStream)`	Returns a new `Font` using the specified font type and input data.
`static Font[]`	`createFonts(File fontFile)`	Returns a new array of `Font` decoded from the specified file.
`static Font[]`	`createFonts(InputStream fontStream)`	Returns a new array of `Font` decoded from the specified stream.
`GlyphVector`	`createGlyphVector(FontRenderContext frc, char[] chars)`	Creates a `GlyphVector` by mapping characters to glyphs one-to-one based on the Unicode cmap in this `Font`.
`GlyphVector`	`createGlyphVector(FontRenderContext frc, int[] glyphCodes)`	Creates a `GlyphVector` by mapping characters to glyphs one-to-one based on the Unicode cmap in this `Font`.
`GlyphVector`	`createGlyphVector(FontRenderContext frc, String str)`	Creates a `GlyphVector` by mapping characters to glyphs one-to-one based on the Unicode cmap in this `Font`.
`GlyphVector`	`createGlyphVector(FontRenderContext frc, CharacterIterator ci)`	Creates a `GlyphVector` by mapping the specified characters to glyphs one-to-one based on the Unicode cmap in this `Font`.
`static Font`	`decode(String str)`	Returns the `Font` that the `str` argument describes.
`Font`	`deriveFont(float size)`	Creates a new `Font` object by replicating the current `Font` object and applying a new size to it.
`Font`	`deriveFont(int style)`	Creates a new `Font` object by replicating the current `Font` object and applying a new style to it.
`Font`	`deriveFont(int style, float size)`	Creates a new `Font` object by replicating this `Font` object and applying a new style and size.
`Font`	`deriveFont(int style, AffineTransform trans)`	Creates a new `Font` object by replicating this `Font` object and applying a new style and transform.
`Font`	`deriveFont(AffineTransform trans)`	Creates a new `Font` object by replicating the current `Font` object and applying a new transform to it.
`Font`	`deriveFont(Map<? extends AttributedCharacterIterator.Attribute,?> attributes)`	Creates a new `Font` object by replicating the current `Font` object and applying a new set of font attributes to it.
`boolean`	`equals(Object obj)`	Compares this `Font` object to the specified `Object`.
`Map<TextAttribute,?>`	`getAttributes()`	Returns a map of font attributes available in this `Font`.
`AttributedCharacterIterator.Attribute[]`	`getAvailableAttributes()`	Returns the keys of all the attributes supported by this `Font`.
`byte`	`getBaselineFor(char c)`	Returns the baseline appropriate for displaying this character.
`String`	`getFamily()`	Returns the family name of this `Font`.
`String`	`getFamily(Locale l)`	Returns the family name of this `Font`, localized for the specified locale.
`static Font`	`getFont(String nm)`	Returns a `Font` object from the system properties list.
`static Font`	`getFont(String nm, Font font)`	Gets the specified `Font` from the system properties list.
`static Font`	`getFont(Map<? extends AttributedCharacterIterator.Attribute,?> attributes)`	Returns a `Font` appropriate to the attributes.
`String`	`getFontName()`	Returns the font face name of this `Font`.
`String`	`getFontName(Locale l)`	Returns the font face name of the `Font`, localized for the specified locale.
`float`	`getItalicAngle()`	Returns the italic angle of this `Font`.
`LineMetrics`	`getLineMetrics(char[] chars, int beginIndex, int limit, FontRenderContext frc)`	Returns a `LineMetrics` object created with the specified arguments.
`LineMetrics`	`getLineMetrics(String str, int beginIndex, int limit, FontRenderContext frc)`	Returns a `LineMetrics` object created with the specified arguments.
`LineMetrics`	`getLineMetrics(String str, FontRenderContext frc)`	Returns a `LineMetrics` object created with the specified `String` and `FontRenderContext`.
`LineMetrics`	`getLineMetrics(CharacterIterator ci, int beginIndex, int limit, FontRenderContext frc)`	Returns a `LineMetrics` object created with the specified arguments.
`Rectangle2D`	`getMaxCharBounds(FontRenderContext frc)`	Returns the bounds for the character with the maximum bounds as defined in the specified `FontRenderContext`.
`int`	`getMissingGlyphCode()`	Returns the glyphCode which is used when this `Font` does not have a glyph for a specified unicode code point.
`String`	`getName()`	Returns the logical name of this `Font`.
`int`	`getNumGlyphs()`	Returns the number of glyphs in this `Font`.
`String`	`getPSName()`	Returns the postscript name of this `Font`.
`int`	`getSize()`	Returns the point size of this `Font`, rounded to an integer.
`float`	`getSize2D()`	Returns the point size of this `Font` in `float` value.
`Rectangle2D`	`getStringBounds(char[] chars, int beginIndex, int limit, FontRenderContext frc)`	Returns the logical bounds of the specified array of characters in the specified `FontRenderContext`.
`Rectangle2D`	`getStringBounds(String str, int beginIndex, int limit, FontRenderContext frc)`	Returns the logical bounds of the specified `String` in the specified `FontRenderContext`.
`Rectangle2D`	`getStringBounds(String str, FontRenderContext frc)`	Returns the logical bounds of the specified `String` in the specified `FontRenderContext`.
`Rectangle2D`	`getStringBounds(CharacterIterator ci, int beginIndex, int limit, FontRenderContext frc)`	Returns the logical bounds of the characters indexed in the specified `CharacterIterator` in the specified `FontRenderContext`.
`int`	`getStyle()`	Returns the style of this `Font`.
`AffineTransform`	`getTransform()`	Returns a copy of the transform associated with this `Font`.
`int`	`hashCode()`	Returns a hashcode for this `Font`.
`boolean`	`hasLayoutAttributes()`	Return true if this Font contains attributes that require extra layout processing.
`boolean`	`hasUniformLineMetrics()`	Checks whether or not this `Font` has uniform line metrics.
`boolean`	`isBold()`	Indicates whether or not this `Font` object's style is BOLD.
`boolean`	`isItalic()`	Indicates whether or not this `Font` object's style is ITALIC.
`boolean`	`isPlain()`	Indicates whether or not this `Font` object's style is PLAIN.
`boolean`	`isTransformed()`	Indicates whether or not this `Font` object has a transform that affects its size in addition to the Size attribute.
`GlyphVector`	`layoutGlyphVector(FontRenderContext frc, char[] text, int start, int limit, int flags)`	Returns a new `GlyphVector` object, performing full layout of the text if possible.
`static boolean`	`textRequiresLayout(char[] chars, int start, int end)`	Returns true if any part of the specified text is from a complex script for which the implementation will need to invoke layout processing in order to render correctly when using `drawString(String,int,int)` and other text rendering methods.
`String`	`toString()`	Converts this `Font` object to a `String` representation.

Methods declared in class java.lang.Object

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

Field Detail

DIALOG

public static final String DIALOG

A String constant for the canonical family name of the logical font "Dialog". It is useful in Font construction to provide compile-time verification of the name.

Since:: 1.6
See Also:: Constant Field Values

DIALOG_INPUT

public static final String DIALOG_INPUT

A String constant for the canonical family name of the logical font "DialogInput". It is useful in Font construction to provide compile-time verification of the name.

Since:: 1.6
See Also:: Constant Field Values

SANS_SERIF

public static final String SANS_SERIF

A String constant for the canonical family name of the logical font "SansSerif". It is useful in Font construction to provide compile-time verification of the name.

Since:: 1.6
See Also:: Constant Field Values

SERIF

public static final String SERIF

A String constant for the canonical family name of the logical font "Serif". It is useful in Font construction to provide compile-time verification of the name.

Since:: 1.6
See Also:: Constant Field Values

MONOSPACED

public static final String MONOSPACED

A String constant for the canonical family name of the logical font "Monospaced". It is useful in Font construction to provide compile-time verification of the name.

Since:: 1.6
See Also:: Constant Field Values

PLAIN

public static final int PLAIN

The plain style constant.

See Also:: Constant Field Values

BOLD

public static final int BOLD

The bold style constant. This can be combined with the other style constants (except PLAIN) for mixed styles.

See Also:: Constant Field Values

ITALIC

public static final int ITALIC

The italicized style constant. This can be combined with the other style constants (except PLAIN) for mixed styles.

See Also:: Constant Field Values

ROMAN_BASELINE

public static final int ROMAN_BASELINE

The baseline used in most Roman scripts when laying out text.

See Also:: Constant Field Values

CENTER_BASELINE

public static final int CENTER_BASELINE

The baseline used in ideographic scripts like Chinese, Japanese, and Korean when laying out text.

See Also:: Constant Field Values

HANGING_BASELINE

public static final int HANGING_BASELINE

The baseline used in Devanagari and similar scripts when laying out text.

See Also:: Constant Field Values

TRUETYPE_FONT

public static final int TRUETYPE_FONT

Identify a font resource of type TRUETYPE. Used to specify a TrueType font resource to the createFont(int, java.io.InputStream) method. The TrueType format was extended to become the OpenType format, which adds support for fonts with Postscript outlines, this tag therefore references these fonts, as well as those with TrueType outlines.

Since:: 1.3
See Also:: Constant Field Values

TYPE1_FONT

public static final int TYPE1_FONT

Identify a font resource of type TYPE1. Used to specify a Type1 font resource to the createFont(int, java.io.InputStream) method.

Since:: 1.5
See Also:: Constant Field Values

name

protected String name

The logical name of this Font, as passed to the constructor.

Since:: 1.0
See Also:: getName()

style

protected int style

The style of this Font, as passed to the constructor. This style can be PLAIN, BOLD, ITALIC, or BOLD+ITALIC.

Since:: 1.0
See Also:: getStyle()

size

protected int size

The point size of this Font, rounded to integer.

Since:: 1.0
See Also:: getSize()

pointSize

protected float pointSize

The point size of this Font in float.

See Also:: getSize(), getSize2D()

LAYOUT_LEFT_TO_RIGHT

public static final int LAYOUT_LEFT_TO_RIGHT

A flag to layoutGlyphVector indicating that text is left-to-right as determined by Bidi analysis.

See Also:: Constant Field Values

LAYOUT_RIGHT_TO_LEFT

public static final int LAYOUT_RIGHT_TO_LEFT

A flag to layoutGlyphVector indicating that text is right-to-left as determined by Bidi analysis.

See Also:: Constant Field Values

LAYOUT_NO_START_CONTEXT

public static final int LAYOUT_NO_START_CONTEXT

A flag to layoutGlyphVector indicating that text in the char array before the indicated start should not be examined.

See Also:: Constant Field Values

LAYOUT_NO_LIMIT_CONTEXT

public static final int LAYOUT_NO_LIMIT_CONTEXT

A flag to layoutGlyphVector indicating that text in the char array after the indicated limit should not be examined.

See Also:: Constant Field Values

Constructor Detail

Font

public Font(String name,
            int style,
            int size)

Creates a new Font from the specified name, style and point size.

The font name can be a font face name or a font family name. It is used together with the style to find an appropriate font face. When a font family name is specified, the style argument is used to select the most appropriate face from the family. When a font face name is specified, the face's style and the style argument are merged to locate the best matching font from the same family. For example if face name "Arial Bold" is specified with style Font.ITALIC, the font system looks for a face in the "Arial" family that is bold and italic, and may associate the font instance with the physical font face "Arial Bold Italic". The style argument is merged with the specified face's style, not added or subtracted. This means, specifying a bold face and a bold style does not double-embolden the font, and specifying a bold face and a plain style does not lighten the font.

If no face for the requested style can be found, the font system may apply algorithmic styling to achieve the desired style. For example, if ITALIC is requested, but no italic face is available, glyphs from the plain face may be algorithmically obliqued (slanted).

Font name lookup is case insensitive, using the case folding rules of the US locale.

If the name parameter represents something other than a logical font, i.e. is interpreted as a physical font face or family, and this cannot be mapped by the implementation to a physical font or a compatible alternative, then the font system will map the Font instance to "Dialog", such that for example, the family as reported by getFamily will be "Dialog".

Parameters:: name - the font name. This can be a font face name or a font family name, and may represent either a logical font or a physical font found in this GraphicsEnvironment. The family names for logical fonts are: Dialog, DialogInput, Monospaced, Serif, or SansSerif. Pre-defined String constants exist for all of these names, for example, DIALOG. If name is null, the logical font name of the new Font as returned by getName() is set to the name "Default".; style - the style constant for the Font The style argument is an integer bitmask that may be PLAIN, or a bitwise union of BOLD and/or ITALIC (for example, ITALIC or BOLD|ITALIC). If the style argument does not conform to one of the expected integer bitmasks then the style is set to PLAIN.; size - the point size of the Font
Since:: 1.0
See Also:: GraphicsEnvironment.getAllFonts(), GraphicsEnvironment.getAvailableFontFamilyNames()

Font

public Font(Map<? extends AttributedCharacterIterator.Attribute,?> attributes)

Creates a new Font with the specified attributes. Only keys defined in TextAttribute are recognized. In addition the FONT attribute is not recognized by this constructor (see getAvailableAttributes()). Only attributes that have values of valid types will affect the new Font.

If attributes is null, a new Font is initialized with default values.

Parameters:: attributes - the attributes to assign to the new Font, or null
See Also:: TextAttribute

Font

protected Font(Font font)

Creates a new Font from the specified font. This constructor is intended for use by subclasses.

Parameters:: font - from which to create this Font.
Throws:: NullPointerException - if font is null
Since:: 1.6

Method Detail

textRequiresLayout

public static boolean textRequiresLayout(char[] chars,
                                         int start,
                                         int end)

Returns true if any part of the specified text is from a complex script for which the implementation will need to invoke layout processing in order to render correctly when using drawString(String,int,int) and other text rendering methods. Measurement of the text may similarly need the same extra processing. The start and end indices are provided so that the application can request only a subset of the text be considered. The last char index examined is at "end-1", i.e a request to examine the entire array would be

Font.textRequiresLayout(chars, 0, chars.length);

An application may find this information helpful in performance sensitive code.

Note that even if this method returns false, layout processing may still be invoked when used with any Font for which hasLayoutAttributes() returns true, so that method will need to be consulted for the specific font, in order to obtain an answer which accounts for such font attributes.

Parameters:: chars - the text.; start - the index of the first char to examine.; end - the ending index, exclusive.
Returns:: true if the specified text will need special layout.
Throws:: NullPointerException - if chars is null.; ArrayIndexOutOfBoundsException - if start is negative or end is greater than the length of the chars array.
Since:: 9

getFont

public static Font getFont(Map<? extends AttributedCharacterIterator.Attribute,?> attributes)

Returns a Font appropriate to the attributes. If attributes contains a FONT attribute with a valid Font as its value, it will be merged with any remaining attributes. See TextAttribute.FONT for more information.

Parameters:: attributes - the attributes to assign to the new Font
Returns:: a new Font created with the specified attributes
Throws:: NullPointerException - if attributes is null.
Since:: 1.2
See Also:: TextAttribute

createFonts

public static Font[] createFonts(InputStream fontStream)
                          throws FontFormatException,
                                 IOException

Returns a new array of Font decoded from the specified stream. The returned Font[] will have at least one element.

The explicit purpose of this variation on the createFont(int, InputStream) method is to support font sources which represent a TrueType/OpenType font collection and be able to return all individual fonts in that collection. Consequently this method will throw FontFormatException if the data source does not contain at least one TrueType/OpenType font. The same exception will also be thrown if any of the fonts in the collection does not contain the required font tables.

The condition "at least one", allows for the stream to represent a single OpenType/TrueType font. That is, it does not have to be a collection. Each Font element of the returned array is created with a point size of 1 and style PLAIN. This base font can then be used with the deriveFont methods in this class to derive new Font objects with varying sizes, styles, transforms and font features.

This method does not close the InputStream.

To make each Font available to Font constructors it must be registered in the GraphicsEnvironment by calling registerFont(Font).

Parameters:: fontStream - an InputStream object representing the input data for the font or font collection.
Returns:: a new Font[].
Throws:: FontFormatException - if the fontStream data does not contain the required font tables for any of the elements of the collection, or if it contains no fonts at all.; IOException - if the fontStream cannot be completely read.
Since:: 9
See Also:: GraphicsEnvironment.registerFont(Font)

createFonts

public static Font[] createFonts(File fontFile)
                          throws FontFormatException,
                                 IOException

Returns a new array of Font decoded from the specified file. The returned Font[] will have at least one element.

The explicit purpose of this variation on the createFont(int, File) method is to support font sources which represent a TrueType/OpenType font collection and be able to return all individual fonts in that collection. Consequently this method will throw FontFormatException if the data source does not contain at least one TrueType/OpenType font. The same exception will also be thrown if any of the fonts in the collection does not contain the required font tables.

The condition "at least one", allows for the stream to represent a single OpenType/TrueType font. That is, it does not have to be a collection. Each Font element of the returned array is created with a point size of 1 and style PLAIN. This base font can then be used with the deriveFont methods in this class to derive new Font objects with varying sizes, styles, transforms and font features.

To make each Font available to Font constructors it must be registered in the GraphicsEnvironment by calling registerFont(Font).

Parameters:: fontFile - a File object containing the input data for the font or font collection.
Returns:: a new Font[].
Throws:: FontFormatException - if the File does not contain the required font tables for any of the elements of the collection, or if it contains no fonts at all.; IOException - if the fontFile cannot be read.
Since:: 9
See Also:: GraphicsEnvironment.registerFont(Font)

createFont

public static Font createFont(int fontFormat,
                              InputStream fontStream)
                       throws FontFormatException,
                              IOException

Returns a new Font using the specified font type and input data. The new Font is created with a point size of 1 and style PLAIN. This base font can then be used with the deriveFont methods in this class to derive new Font objects with varying sizes, styles, transforms and font features. This method does not close the InputStream.

To make the Font available to Font constructors the returned Font must be registered in the GraphicsEnvironment by calling registerFont(Font).

Parameters:: fontFormat - the type of the Font, which is TRUETYPE_FONT if a TrueType resource is specified. or TYPE1_FONT if a Type 1 resource is specified.; fontStream - an InputStream object representing the input data for the font.
Returns:: a new Font created with the specified font type.
Throws:: IllegalArgumentException - if fontFormat is not TRUETYPE_FONT or TYPE1_FONT.; FontFormatException - if the fontStream data does not contain the required font tables for the specified format.; IOException - if the fontStream cannot be completely read.
Since:: 1.3
See Also:: GraphicsEnvironment.registerFont(Font)

createFont

public static Font createFont(int fontFormat,
                              File fontFile)
                       throws FontFormatException,
                              IOException

Returns a new Font using the specified font type and the specified font file. The new Font is created with a point size of 1 and style PLAIN. This base font can then be used with the deriveFont methods in this class to derive new Font objects with varying sizes, styles, transforms and font features.

Parameters:: fontFormat - the type of the Font, which is TRUETYPE_FONT if a TrueType resource is specified or TYPE1_FONT if a Type 1 resource is specified. So long as the returned font, or its derived fonts are referenced the implementation may continue to access fontFile to retrieve font data. Thus the results are undefined if the file is changed, or becomes inaccessible.
To make the Font available to Font constructors the returned Font must be registered in the GraphicsEnvironment by calling registerFont(Font).; fontFile - a File object representing the input data for the font.
Returns:: a new Font created with the specified font type.
Throws:: IllegalArgumentException - if fontFormat is not TRUETYPE_FONT or TYPE1_FONT.; NullPointerException - if fontFile is null.; IOException - if the fontFile cannot be read.; FontFormatException - if fontFile does not contain the required font tables for the specified format.; SecurityException - if the executing code does not have permission to read from the file.
Since:: 1.5
See Also:: GraphicsEnvironment.registerFont(Font)

getTransform

public AffineTransform getTransform()

Returns a copy of the transform associated with this Font. This transform is not necessarily the one used to construct the font. If the font has algorithmic superscripting or width adjustment, this will be incorporated into the returned AffineTransform.

Typically, fonts will not be transformed. Clients generally should call isTransformed() first, and only call this method if isTransformed returns true.

Returns:: an AffineTransform object representing the transform attribute of this Font object.

getFamily

public String getFamily()

Returns the family name of this Font.

The family name of a font is font specific. Two fonts such as Helvetica Italic and Helvetica Bold have the same family name, Helvetica, whereas their font face names are Helvetica Bold and Helvetica Italic. The list of available family names may be obtained by using the GraphicsEnvironment.getAvailableFontFamilyNames() method.

Use getName to get the logical name of the font. Use getFontName to get the font face name of the font.

Returns:: a String that is the family name of this Font.
Since:: 1.1
See Also:: getName(), getFontName()

getFamily

public String getFamily(Locale l)

Returns the family name of this Font, localized for the specified locale.

The family name of a font is font specific. Two fonts such as Helvetica Italic and Helvetica Bold have the same family name, Helvetica, whereas their font face names are Helvetica Bold and Helvetica Italic. The list of available family names may be obtained by using the GraphicsEnvironment.getAvailableFontFamilyNames() method.

Use getFontName to get the font face name of the font.

Parameters:: l - locale for which to get the family name
Returns:: a String representing the family name of the font, localized for the specified locale.
Since:: 1.2
See Also:: getFontName(), Locale

getPSName

public String getPSName()

Returns the postscript name of this Font. Use getFamily to get the family name of the font. Use getFontName to get the font face name of the font.

Returns:: a String representing the postscript name of this Font.
Since:: 1.2

getName

public String getName()

Returns the logical name of this Font. Use getFamily to get the family name of the font. Use getFontName to get the font face name of the font.

Returns:: a String representing the logical name of this Font.
Since:: 1.0
See Also:: getFamily(), getFontName()

getFontName

public String getFontName()

Returns the font face name of this Font. For example, Helvetica Bold could be returned as a font face name. Use getFamily to get the family name of the font. Use getName to get the logical name of the font.

Returns:: a String representing the font face name of this Font.
Since:: 1.2
See Also:: getFamily(), getName()

getFontName

public String getFontName(Locale l)

Returns the font face name of the Font, localized for the specified locale. For example, Helvetica Fett could be returned as the font face name. Use getFamily to get the family name of the font.

Parameters:: l - a locale for which to get the font face name
Returns:: a String representing the font face name, localized for the specified locale.
See Also:: getFamily(), Locale

getStyle

public int getStyle()

Returns the style of this Font. The style can be PLAIN, BOLD, ITALIC, or BOLD+ITALIC.

Returns:: the style of this Font
Since:: 1.0
See Also:: isPlain(), isBold(), isItalic()

getSize

public int getSize()

Returns the point size of this Font, rounded to an integer. Most users are familiar with the idea of using point size to specify the size of glyphs in a font. This point size defines a measurement between the baseline of one line to the baseline of the following line in a single spaced text document. The point size is based on typographic points, approximately 1/72 of an inch.

The Java(tm)2D API adopts the convention that one point is equivalent to one unit in user coordinates. When using a normalized transform for converting user space coordinates to device space coordinates 72 user space units equal 1 inch in device space. In this case one point is 1/72 of an inch.

Returns:: the point size of this Font in 1/72 of an inch units.
Since:: 1.0
See Also:: getSize2D(), GraphicsConfiguration.getDefaultTransform(), GraphicsConfiguration.getNormalizingTransform()

getSize2D

public float getSize2D()

Returns the point size of this Font in float value.

Returns:: the point size of this Font as a float value.
Since:: 1.2
See Also:: getSize()

isPlain

public boolean isPlain()

Indicates whether or not this Font object's style is PLAIN.

Returns:: true if this Font has a PLAIN style; false otherwise.
Since:: 1.0
See Also:: getStyle()

isBold

public boolean isBold()

Indicates whether or not this Font object's style is BOLD.

Returns:: true if this Font object's style is BOLD; false otherwise.
Since:: 1.0
See Also:: getStyle()

isItalic

public boolean isItalic()

Indicates whether or not this Font object's style is ITALIC.

Returns:: true if this Font object's style is ITALIC; false otherwise.
Since:: 1.0
See Also:: getStyle()

isTransformed

public boolean isTransformed()

Indicates whether or not this Font object has a transform that affects its size in addition to the Size attribute.

Returns:: true if this Font object has a non-identity AffineTransform attribute. false otherwise.
Since:: 1.4
See Also:: getTransform()

hasLayoutAttributes

public boolean hasLayoutAttributes()

Return true if this Font contains attributes that require extra layout processing.

Returns:: true if the font has layout attributes
Since:: 1.6

getFont

public static Font getFont(String nm)

Returns a Font object from the system properties list. nm is treated as the name of a system property to be obtained. The String value of this property is then interpreted as a Font object according to the specification of Font.decode(String) If the specified property is not found, or the executing code does not have permission to read the property, null is returned instead.

Parameters:: nm - the property name
Returns:: a Font object that the property name describes, or null if no such property exists.
Throws:: NullPointerException - if nm is null.
Since:: 1.2
See Also:: decode(String)

decode

public static Font decode(String str)

Returns the Font that the str argument describes. To ensure that this method returns the desired Font, format the str parameter in one of these ways

fontname-style-pointsize
fontname-pointsize
fontname-style
fontname
fontname style pointsize
fontname pointsize
fontname style
fontname

in which style is one of the four case-insensitive strings: "PLAIN", "BOLD", "BOLDITALIC", or "ITALIC", and pointsize is a positive decimal integer representation of the point size. For example, if you want a font that is Arial, bold, with a point size of 18, you would call this method with: "Arial-BOLD-18". This is equivalent to calling the Font constructor : new Font("Arial", Font.BOLD, 18); and the values are interpreted as specified by that constructor.

A valid trailing decimal field is always interpreted as the pointsize. Therefore a fontname containing a trailing decimal value should not be used in the fontname only form.

If a style name field is not one of the valid style strings, it is interpreted as part of the font name, and the default style is used.

Only one of ' ' or '-' may be used to separate fields in the input. The identified separator is the one closest to the end of the string which separates a valid pointsize, or a valid style name from the rest of the string. Null (empty) pointsize and style fields are treated as valid fields with the default value for that field.

Some font names may include the separator characters ' ' or '-'. If str is not formed with 3 components, e.g. such that style or pointsize fields are not present in str, and fontname also contains a character determined to be the separator character then these characters where they appear as intended to be part of fontname may instead be interpreted as separators so the font name may not be properly recognised.

The default size is 12 and the default style is PLAIN. If str does not specify a valid size, the returned Font has a size of 12. If str does not specify a valid style, the returned Font has a style of PLAIN. If you do not specify a valid font name in the str argument, this method will return a font with the family name "Dialog". To determine what font family names are available on your system, use the GraphicsEnvironment.getAvailableFontFamilyNames() method. If str is null, a new Font is returned with the family name "Dialog", a size of 12 and a PLAIN style.

Parameters:: str - the name of the font, or null
Returns:: the Font object that str describes, or a new default Font if str is null.
Since:: 1.1
See Also:: getFamily()

getFont

public static Font getFont(String nm,
                           Font font)

Gets the specified Font from the system properties list. As in the getProperty method of System, 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 a Font object.

The property value should be one of the forms accepted by Font.decode(String) If the specified property is not found, or the executing code does not have permission to read the property, the font argument is returned instead.

Parameters:: nm - the case-insensitive property name; font - a default Font to return if property nm is not defined
Returns:: the Font value of the property.
Throws:: NullPointerException - if nm is null.
See Also:: decode(String)

hashCode

public int hashCode()

Returns a hashcode for this Font.

Overrides:: hashCode in class Object
Returns:: a hashcode value for this Font.
Since:: 1.0
See Also:: Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)

equals

public boolean equals(Object obj)

Compares this Font object to the specified Object.

Overrides:: equals in class Object
Parameters:: obj - the Object to compare
Returns:: true if the objects are the same or if the argument is a Font object describing the same font as this object; false otherwise.
Since:: 1.0
See Also:: Object.hashCode(), HashMap

toString

public String toString()

Converts this Font object to a String representation.

Overrides:: toString in class Object
Returns:: a String representation of this Font object.
Since:: 1.0

getNumGlyphs

public int getNumGlyphs()

Returns the number of glyphs in this Font. Glyph codes for this Font range from 0 to getNumGlyphs() - 1.

Returns:: the number of glyphs in this Font.
Since:: 1.2

getMissingGlyphCode

public int getMissingGlyphCode()

Returns the glyphCode which is used when this Font does not have a glyph for a specified unicode code point.

Returns:: the glyphCode of this Font.
Since:: 1.2

getBaselineFor

public byte getBaselineFor(char c)

Returns the baseline appropriate for displaying this character.

Large fonts can support different writing systems, and each system can use a different baseline. The character argument determines the writing system to use. Clients should not assume all characters use the same baseline.

Parameters:: c - a character used to identify the writing system
Returns:: the baseline appropriate for the specified character.
Since:: 1.2
See Also:: LineMetrics.getBaselineOffsets(), ROMAN_BASELINE, CENTER_BASELINE, HANGING_BASELINE

getAttributes

public Map<TextAttribute,?> getAttributes()

Returns a map of font attributes available in this Font. Attributes include things like ligatures and glyph substitution.

Returns:: the attributes map of this Font.

getAvailableAttributes

public AttributedCharacterIterator.Attribute[] getAvailableAttributes()

Returns the keys of all the attributes supported by this Font. These attributes can be used to derive other fonts.

Returns:: an array containing the keys of all the attributes supported by this Font.
Since:: 1.2

deriveFont

public Font deriveFont(int style,
                       float size)

Creates a new Font object by replicating this Font object and applying a new style and size.

Parameters:: style - the style for the new Font; size - the size for the new Font
Returns:: a new Font object.
Since:: 1.2

deriveFont

public Font deriveFont(int style,
                       AffineTransform trans)

Creates a new Font object by replicating this Font object and applying a new style and transform.

Parameters:: style - the style for the new Font; trans - the AffineTransform associated with the new Font
Returns:: a new Font object.
Throws:: IllegalArgumentException - if trans is null
Since:: 1.2

deriveFont

public Font deriveFont(float size)

Creates a new Font object by replicating the current Font object and applying a new size to it.

Parameters:: size - the size for the new Font.
Returns:: a new Font object.
Since:: 1.2

deriveFont

public Font deriveFont(AffineTransform trans)

Creates a new Font object by replicating the current Font object and applying a new transform to it.

Parameters:: trans - the AffineTransform associated with the new Font
Returns:: a new Font object.
Throws:: IllegalArgumentException - if trans is null
Since:: 1.2

deriveFont

public Font deriveFont(int style)

Creates a new Font object by replicating the current Font object and applying a new style to it.

Parameters:: style - the style for the new Font
Returns:: a new Font object.
Since:: 1.2

deriveFont

public Font deriveFont(Map<? extends AttributedCharacterIterator.Attribute,?> attributes)

Creates a new Font object by replicating the current Font object and applying a new set of font attributes to it.

Parameters:: attributes - a map of attributes enabled for the new Font
Returns:: a new Font object.
Since:: 1.2

canDisplay

public boolean canDisplay(char c)

Checks if this Font has a glyph for the specified character.

Note: This method cannot handle supplementary characters. To support all Unicode characters, including supplementary characters, use the canDisplay(int) method or canDisplayUpTo methods.

Parameters:: c - the character for which a glyph is needed
Returns:: true if this Font has a glyph for this character; false otherwise.
Since:: 1.2

canDisplay

public boolean canDisplay(int codePoint)

Checks if this Font has a glyph for the specified character.

Parameters:: codePoint - the character (Unicode code point) for which a glyph is needed.
Returns:: true if this Font has a glyph for the character; false otherwise.
Throws:: IllegalArgumentException - if the code point is not a valid Unicode code point.
Since:: 1.5
See Also:: Character.isValidCodePoint(int)

canDisplayUpTo

public int canDisplayUpTo(String str)

Indicates whether or not this Font can display a specified String. For strings with Unicode encoding, it is important to know if a particular font can display the string. This method returns an offset into the String str which is the first character this Font cannot display without using the missing glyph code. If the Font can display all characters, -1 is returned.

Parameters:: str - a String object
Returns:: an offset into str that points to the first character in str that this Font cannot display; or -1 if this Font can display all characters in str.
Since:: 1.2

canDisplayUpTo

public int canDisplayUpTo(char[] text,
                          int start,
                          int limit)

Indicates whether or not this Font can display the characters in the specified text starting at start and ending at limit. This method is a convenience overload.

Parameters:: text - the specified array of char values; start - the specified starting offset (in chars) into the specified array of char values; limit - the specified ending offset (in chars) into the specified array of char values
Returns:: an offset into text that points to the first character in text that this Font cannot display; or -1 if this Font can display all characters in text.
Since:: 1.2

canDisplayUpTo

public int canDisplayUpTo(CharacterIterator iter,
                          int start,
                          int limit)

Indicates whether or not this Font can display the text specified by the iter starting at start and ending at limit.

Parameters:: iter - a CharacterIterator object; start - the specified starting offset into the specified CharacterIterator.; limit - the specified ending offset into the specified CharacterIterator.
Returns:: an offset into iter that points to the first character in iter that this Font cannot display; or -1 if this Font can display all characters in iter.
Since:: 1.2

getItalicAngle

public float getItalicAngle()

Returns the italic angle of this Font. The italic angle is the inverse slope of the caret which best matches the posture of this Font.

Returns:: the angle of the ITALIC style of this Font.
See Also:: TextAttribute.POSTURE

hasUniformLineMetrics

public boolean hasUniformLineMetrics()

Checks whether or not this Font has uniform line metrics. A logical Font might be a composite font, which means that it is composed of different physical fonts to cover different code ranges. Each of these fonts might have different LineMetrics. If the logical Font is a single font then the metrics would be uniform.

Returns:: true if this Font has uniform line metrics; false otherwise.

getLineMetrics

public LineMetrics getLineMetrics(String str,
                                  FontRenderContext frc)

Returns a LineMetrics object created with the specified String and FontRenderContext.

Parameters:: str - the specified String; frc - the specified FontRenderContext
Returns:: a LineMetrics object created with the specified String and FontRenderContext.

getLineMetrics

public LineMetrics getLineMetrics(String str,
                                  int beginIndex,
                                  int limit,
                                  FontRenderContext frc)

Returns a LineMetrics object created with the specified arguments.

Parameters:: str - the specified String; beginIndex - the initial offset of str; limit - the end offset of str; frc - the specified FontRenderContext
Returns:: a LineMetrics object created with the specified arguments.

getLineMetrics

public LineMetrics getLineMetrics(char[] chars,
                                  int beginIndex,
                                  int limit,
                                  FontRenderContext frc)

Returns a LineMetrics object created with the specified arguments.

Parameters:: chars - an array of characters; beginIndex - the initial offset of chars; limit - the end offset of chars; frc - the specified FontRenderContext
Returns:: a LineMetrics object created with the specified arguments.

getLineMetrics

public LineMetrics getLineMetrics(CharacterIterator ci,
                                  int beginIndex,
                                  int limit,
                                  FontRenderContext frc)

Returns a LineMetrics object created with the specified arguments.

Parameters:: ci - the specified CharacterIterator; beginIndex - the initial offset in ci; limit - the end offset of ci; frc - the specified FontRenderContext
Returns:: a LineMetrics object created with the specified arguments.

getStringBounds

public Rectangle2D getStringBounds(String str,
                                   FontRenderContext frc)

Returns the logical bounds of the specified String in the specified FontRenderContext. The logical bounds contains the origin, ascent, advance, and height, which includes the leading. The logical bounds does not always enclose all the text. For example, in some languages and in some fonts, accent marks can be positioned above the ascent or below the descent. To obtain a visual bounding box, which encloses all the text, use the getBounds method of TextLayout.