User:Thisoldman

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Java (Sun) Fonts

Users may find the default Java fonts and their display in Java applications unpleasant. Several methods to improve font display in the Sun Java Runtime Environment (JRE)[1] are available. The methods may be used separately, but many users will find better results by combining them.

Anti-aliasing

Anti-aliasing[2] of fonts is available with Sun Java 1.6 on Linux. To do this on a per user basis, add the following line to the user's ~/.bashrc.

export _JAVA_OPTIONS='-Dawt.useSystemAAFontSettings=gasp'

The value, gasp, is one of seven possible settings for -Dawt.useSystemAAFontSettings.[3] These settings are:Template:Sn

The gasp and lcd settings work well in many instances.

For the above change to take effect, ~/.bashrc must be sourced as the normal user.

$ source ~/.bashrc

Open a new instance of a Java application to test the changes made.

Font Selection

Enable TrueType Fonts

TrueType fonts appear to be the best supported format in Java. Java applications that are coded to use a specific TrueType font must be given the path to that font. TrueType fonts are located in the directory /usr/share/fonts/TTF. Add the following line to ~/.bashrc to enable these fonts.

export JAVA_FONTS=/usr/share/fonts/TTF

Source ~/.bashrc as the normal user for the change to take effect.

$ source ~/.bashrc

Change the Default Fonts

The Lucida[4] fonts distributed along with the Sun JRE are the default for Java applications that do not specify a different font's use. The Lucida fonts were designed for low resolution displays and printers[5], many users will wish to use other fonts. This default Java font can be changed on a system-wide basis by the creation or editing of a file named fontconfig.properties.

As root, change directory to /opt/java/jre/lib. Copy fontconfig.properties.src to fontconfig.properties. Then, as root, open fontconfig.properties in an editor.

# cd /opt/java/jre/lib
# cp fontconfig.properties.src fontconfig.properties
# nano fontconfig.properties      ## Editor is the user's choice.
Note: Encodings other than Latin-1, or ISO 8859-1,[6] are shown in other fontconfig.properties.*.src files in /opt/java/jre/lib. Some users will find these files to be better sources to use for editing. In all cases the edited file should be saved as fontconfig.properties.

The Java font names in this configuration file are in the form of genericFontName.style.subset, for example,Template:Codeline. These generic fonts are mapped to the installed fonts using X Logical Font Description (XLFD)[7] names. The %d, in the example below, is used as a placeholder in the XLFD name for the point size. The Java application will replace %d at runtime.

serif.plain.latin-1=-b&h-lucidabright-medium-r-normal--*-%d-*-*-p-*-iso8859-1
Tip: The utility, xfontsel, may be used to display fonts and to discover their XLFD name. Xfontsel is part of the xorg-utils package.

Below is an excerpt of a fontconfig.properties file after modifications have been made. The Lucida fonts have been replaced by variations of the DejaVu[8] fonts.

# Version -- a version number is required.
# IMPORTANT -- Do not delete the next line. Ever.
version=1

# Component Font Mappings
# gen_name.style.subset=
#       -fndry-fmly-wght-slant-sWdth-adstyle-pxlsz-ptSz-resx-resy-spc-avgWdth-rgstry-encdng

serif.plain.latin-1=-misc-dejavu serif-medium-r-normal-*-*-%d-*-*-p-*-iso8859-1
serif.bold.latin-1=-misc-dejavu serif-bold-r-normal-*-*-%d-*-*-p-*-iso8859-1
serif.italic.latin-1=-misc-dejavu serif-medium-i-normal-*-*-%d-*-*-p-*-iso8859-1

After the changes have been saved to fontconfig.properties, the editor may be closed and the user should drop root privileges. Open a new instance of a Java application to test the changes.