The Solaris x86 tar bundle "j2sdk-1_4_0-beta-solx86.tar.Z" have SUNWj3rtx and SUNWj3dvx and
these packages are built for SPARC system because ARCH package attribute is "sparc" each.

After extracting the bundle:

# ls
COPYRIGHT README.html SUNWj3dvx SUNWj3rtx SUNWjuj3m
LICENSE SUNWj3dev SUNWj3man SUNWjej3m
README SUNWj3dmo SUNWj3rt SUNWjpj3m
# cat SUNWj3*x/pkginfo
PKG=SUNWj3dvx
NAME=J2SDK 1.4 development tools (64-bit)
ARCH=sparc
VERSION=1.4.0,REV=2001.05.16.02.43
SUNW_PRODNAME=J2SDK 1.4
SUNW_PRODVERS=1.4.0/1.4.0-beta-b65
SUNW_PKGTYPE=usr
SUNW_ISA=sparcv9
MAXINST=1000
CATEGORY=system
SUNW_PKGVERS=1.0
DESC=Tools and utilities including javac, jdb, javadoc, rmiregistry (64 bit)
VENDOR=Sun Microsystems, Inc.
HOTLINE=Please contact your local service provider
EMAIL=
CLASSES=none
BASEDIR=/usr
PSTAMP=hoti386m16024503
PKG=SUNWj3rtx
NAME=J2SDK 1.4 runtime environment (64-bit)
ARCH=sparc
VERSION=1.4.0,REV=2001.05.16.02.43
SUNW_PRODNAME=J2SDK 1.4
SUNW_PRODVERS=1.4.0/1.4.0-beta-b65
SUNW_PKGTYPE=usr
SUNW_ISA=sparcv9
MAXINST=1000
CATEGORY=system
SUNW_PKGVERS=1.0
DESC=Java virtual machine and core class libraries (64 bit)
VENDOR=Sun Microsystems, Inc.
HOTLINE=Please contact your local service provider
CLASSES=none
BASEDIR=/usr
PSTAMP=hoti386m16024502
#

kenichi.kurosaki@Japan 2001-05-22