4.1 Interfaces and Classes

The following tables list the key font and text layout interfaces and classes. Most of these interfaces and classes are part of the java.awt.font package. Some, like Font, are part of the java.awt package to maintain backward compatibility with earlier versions of the JDK.

Interface	Description
MultipleMaster	Represents Type 1 Multiple Master fonts. Implemented by Font objects that are multiple master fonts to enable access to multiple master design controls.
OpenType	Represents Open Type and True Type fonts. Implemented by Font objects that are Open Type or True Type fonts to enable access to the font's sfnt tables.

Class	Description
Font	Represents an instance of a font face from the collection of font faces available on the host system. Supports the specification of detailed font information and provides access to information about the font and its glyphs. (In java.awt package.)
FontRenderContext	Encapsulates the information necessary to correctly measure text.
GlyphJustificationInfo	Represents information about the justification properties of a glyph, such as weight, priority, absorb, and limit.
GlyphMetrics	Provides metrics for a single glyph.
GlyphVector	A collection of glyphs and their positions.
GraphicAttribute	Base class for a TextLayout attribute that specifies a graphic to be embedded within text. Implemented by ShapeGraphicAttribute and ImageGraphicAttribute, which enable Shapes and Images to be embedded in a TextLayout. Can be subclassed to implement custom character replacement graphics.
ImageGraphicAttribute	Extends: GraphicAttribute A GraphicsAttribute used to draw Images within a TextLayout.
LineBreakMeasurer	Breaks a block of text that spans multiple lines into TextLayout objects that fit within a specified line length.
LineMetrics	Provides access to the font metrics needed to lay out characters along a line and to lay out a set of lines. These metrics include ascent, descent, leading, height, and baseline information.
ShapeGraphicAttribute	Extends: GraphicAttribute A GraphicsAttribute used to draw Shapes within a TextLayout.
TextAttribute	Defines attribute keys and values used for text rendering.
TextHitInfo	Represents hit test information for characters in a TextLayout.
TextLayout	Implements: Cloneable Provides an immutable graphical representation of styled character data, including bidirectional text.