Core Swing Components - The Definitive Guide to Java Swing - page 89

The displayedMnemonicIndex property adds the ability for the mnemonic highlighted to
not be the first instance of mnemonic in the label's text. The index you specify represents the
position in the text, not the instance of the mnemonic. To highlight the second e in Username,
you would specify an index of 7: label.setDisplayedMnemonicIndex(7) .

■ Note The component setting of the labelFor property is stored as a client property of the JLabel with

the LABELED_BY_PROPERTY key constant. The setting is used for accessibility purposes.

Customizing a JLabel Look and Feel
Each installable Swing look and feel provides a different JLabel appearance and set of default
UIResource value settings. Although appearances differ based on the current look and feel, the
differences are minimal within the preinstalled set of look and feel types. Table 4-9 shows the
available set of UIResource -related properties for a JLabel . There are eight different properties
for the JLabel component.

Table 4-9. JLabel UIResource Elements

Property String Object Type

Label.actionMap ActionMap

Label.background Color

Label.border Border

Label.disabledForeground Color

Label.disabledShadow Color

Label.font Font

Label.foreground Color

LabelUI String

Interface Icon
The Icon interface is used to associate glyphs with various components. A glyph (like a symbol
on a highway sign that conveys information nonverbally, such as “winding road ahead!”) can
be a simple drawing or a GIF image loaded from disk with the ImageIcon class. The interface
contains two properties describing the size and a method to paint the glyph.

public interface Icon {
// Properties
public int getIconHeight();
public int getIconWidth();
// Other methods
public void paintIcon(Component c, Graphics g, int x, int y);
}