Java Foundation Classes in a Nutshell

protected java.awt.FontMetrics getFontMetrics();

}

Hierar chy: Object→ View(SwingConstants)→ PlainV iew(TabExpander)→ FieldV iew

Subc lasses: PasswordV iew

GapContent Ja va 1.2

javax.swing .text serializable

This class is an implementation of the AbstractDocument.Content inter face that uses an

array of characters with a gap of unused characters in it. This gap is positioned near the

curr ent insertion position so that subsequent insertions requir e fewer characters to be

shifted in the array. This implementation is more complicated than StringContent, but it

works efficiently with documents of any size. This is the default Content implementation

for all documents derived from AbstractDocument. This class inherits from a private super-

class, GapVector, which is not covered in this book because it is private.

public class GapContent extends GapVector implements AbstractDocument.Content, Serializable {

// Public Constructors

public GapContent();

public GapContent(int initialLength);

// Methods Implementing AbstractDocument.Content

public Position createPosition(int offset) throws BadLocationException;

public void getChars(int where, int len, Segment chars) throws BadLocationException;

public String getString(int where, int len) throws BadLocationException;

public javax.swing.undo.UndoableEdit inser tString(int where, String str) throws BadLocationException;

public int length();

public javax.swing.undo.UndoableEdit ...