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

Calculating dependencies... done!

The following USE changes are necessary to proceed:
 (see "package.use" in the portage(5) man page for more details)
# required by dev-java/netbeans-platform-8.2::gentoo
# required by dev-java/netbeans-java-8.2::gentoo
# required by dev-java/netbeans-profiler-8.2::gentoo
# required by dev-util/netbeans-8.2::gentoo[netbeans_modules_profiler]
# required by =dev-util/netbeans-8.2 (argument)
>=dev-java/swing-layout-1.0.4-r1 source
# required by dev-java/netbeans-platform-8.2::gentoo
# required by dev-java/netbeans-java-8.2::gentoo
# required by dev-java/netbeans-profiler-8.2::gentoo
# required by dev-util/netbeans-8.2::gentoo[netbeans_modules_profiler]
# required by =dev-util/netbeans-8.2 (argument)
>=dev-java/junit-4.12-r1 source
# required by dev-util/eric-17.03::gentoo
# required by =dev-util/eric-17.03 (argument)
>=dev-python/PyQt5-5.7.1 network gui sql webkit printsupport help
# required by dev-java/netbeans-platform-8.2::gentoo
# required by dev-java/netbeans-java-8.2::gentoo
# required by dev-java/netbeans-profiler-8.2::gentoo
# required by dev-util/netbeans-8.2::gentoo[netbeans_modules_profiler]
# required by =dev-util/netbeans-8.2 (argument)
>=dev-java/oracle-jdk-bin-1.8.0.121 javafx
# required by dev-python/PyQt5-5.7.1::gentoo[webkit]
# required by dev-python/qscintilla-python-2.9.4-r1::gentoo[qt5]
# required by dev-util/eric-17.03::gentoo
# required by =dev-util/eric-17.03 (argument)
>=dev-qt/qtwebkit-5.7.1 printsupport

Would you like to add these changes to your config files? [Yes/No] yes

Autounmask changes successfully written.

 * IMPORTANT: config file '/etc/portage/package.use' needs updating.
 * See the CONFIGURATION FILES and CONFIGURATION FILES UPDATE TOOLS
 * sections of the emerge man page to learn how to update config files.

emerge: there are no ebuilds to satisfy "dev-java/jython:2.2".
(dependency required by "dev-java/bsf-2.4.0-r2::gentoo[python]" [ebuild])
(dependency required by "dev-java/bsh-2.0_beta6::gentoo" [ebuild])
(dependency required by "dev-java/testng-6.9.10::gentoo" [ebuild])
(dependency required by "dev-java/netbeans-platform-8.2::gentoo" [ebuild])
(dependency required by "dev-java/netbeans-java-8.2::gentoo" [ebuild])
(dependency required by "dev-java/netbeans-profiler-8.2::gentoo" [ebuild])
(dependency required by "dev-util/netbeans-8.2::gentoo[netbeans_modules_profiler]" [ebuild])
(dependency required by "=dev-util/netbeans-8.2" [argument])