Java Foundation Classes in a Nutshell

CHAPTER 15

Thejava.awt.font Package

The java.awt.font package contains classes and interfaces related to fonts; it is new

in Java 1.2. Note, however, that the Font class itself is part of the java.awt package.

This package contains low-level classes for obtaining information about the mea-

sur ements of font glyphs and lines of text. It also contains classes for the low-level

layout of text. LineMetrics and TextLayout ar e the two most important classes in this

package. Figure 15-1 shows the class hierarchy of this package.

Most programs can rely on the higher-level text display features of java.awt and

javax.swing and do not have to use this package.

FontRenderContext Ja va 1.2

java.awt.font

This class stores the information necessary to precisely measure the size of text. It is

used by a number of Font methods and also by TextLayout and LineBreakMeasurer. Although

FontRenderContext has a public constructor, it is mor e common to obtain a FontRenderCon-

text by calling the getFontRenderContext() method of a Graphics2D object.

public class FontRenderContext {

// Public Constructors

public FontRenderContext(java.awt.geom.AffineTransform tx, boolean isAntiAliased,

boolean usesFractionalMetrics);

// Protected Constructors

protected FontRenderContext();

// Property Accessor Methods (by property name)

public boolean isAntiAliased();

public java.awt.geom.AffineTransform getTransfor m();

// Public Instance Methods ...