localhost apache2 #  emerge -vp =sun-jdk-1.4*

These are the packages that would be merged, in order:

Calculating dependencies
!!! All ebuilds that could satisfy "=sun-jdk-1.4*" have been masked.
!!! One of the following masked packages is required to complete your request:
- dev-java/sun-jdk-1.4.2.12-r1 (masked by: package.mask, ~x86 keyword)
- dev-java/sun-jdk-1.4.2.12-r2 (masked by: package.mask)
- dev-java/sun-jdk-1.4.2.12 (masked by: ~x86 keyword)
- dev-java/sun-jdk-1.4.2.10-r2 (masked by: package.mask)

For more information, see MASKED PACKAGES section in the emerge man page or
refer to the Gentoo Handbook.