The release documentation for J2SDK 1.3.0[_xx] on Solaris contains important information about font requirements in its README.sparc and README.i386 files. If you look today (5/16/01), you can still find these documents referenced from the Solaris download page:
http://java.sun.com/j2se/1.3/download-solaris.html
http://java.sun.com/j2se/1.3/README.sparc
http://java.sun.com/j2se/1.3/README.i386
Since this information will be overwritten tomorrow, I've copied the relevant sections below.

The new Ladybird download page apparently does no longer provide this information. There's a new README.html page, which doesn't have the font information, and the references to the old README pages are gone:
http://webwork.eng.sun.com/j2se/1.3/download-solaris.html

This is a serious issue, since we continuously get bug reports or emails from users who get warnings about missing fonts from their J2REs. So far we could point them to these README pages, now we can't anymore.

Instead of resurrecting the old README pages, it might be better to add the information directly to the installation instructions, similar to the patches information.


From http://java.sun.com/j2se/1.3/README.sparc,
http://java.sun.com/j2se/1.3/README.i386:

FONT packages requirement:
-------------------------
   Different locales may require different character encodings.
   You should check the table below to see what Solaris Font Packages
   you may need on your system. The utility "pkginfo" can be used to
   list the packages you have installed on your system.


        Required Solaris Font Packages For Java 2 on Solaris

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Java Encoding Font Locales supported by encoding
Locale Packages
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

***ALL*** iso-8859-1 SUNWi1of, ***Required for all locales***
                             SUNWxwfnt (and sufficient for most Western
                                           European locales.)

*_EURO iso-8859-15 SUNWi15rf(3) Euro currency locale variants

cs,hu,pl iso-8859-2 SUNWi2of, Czech Republic, Hungary, Poland,
                             SUNWi2rf(1) Slovakia, Albania, Bosnia, Croatia,
                                           Romania, Slovenia

lt,lv iso-8859-4 SUNWi4of, Latvia, Lithuania (Solaris 2.6 and 7)
                             SUNWi4rf

lt,lv iso-8859-13 SUNWi13rf Latvia, Lithuania (Solaris 8)

ru iso-8859-5 SUNWi5of Russia, Bulgaria, Macedonia, Serbia

el iso-8859-7 SUNWi7of, Greece
                             SUNWi7rf

tr iso-8859-9 SUNWi9of, Turkey
                             SUNWi9rf

ja jisx0201,jisx0208, SUNWjxcft, Japan
             jisx0212 SUNWjxmft(2)

ko ksc5601 SUNWkcoft Korea

zh_CN gb2312 SUNWcttf China (PRC)

zh_TW cns11643 SUNWhttf China (Taiwan)

zh_TW_Big5 big5 SUNW5ttf(4) China (Taiwan) BIG5

zh_GBK gbk SUNWgttf China (PRC) GBK

*_UTF-8 utf-8 SUNW5ttf,SUNWcttf, All UTF-8 locales (Solaris 8)
                         SUNWi15rf,SUNWi2of,
                         SUNWi4of,SUNWi4rf,
                         SUNWi5of,SUNWi7of,
                         SUNWi7rf,SUNWi9of,
                         SUNWi9rf,SUNWjxcft,
                         SUNWjxmft(2),SUNWkttf





Notes:
  (1) SUNWi2rf is needed for Solaris 2.6 and 7.
  (2) SUNWjxmft is needed for Solaris 8.
  (3) Euro locale fonts for Solaris 2.6 are supplied with the
       Euro currency support patches instead.
  (4) SUNW5ttf is available for Solaris 7 and 8.