I cant install cacti using a port

I install macports

but i cant install cacti using a port

sudo port install cacti
Password:
---> Computing dependencies for cacti
---> Dependencies to be installed: rrdtool pango Xft2 xrender xorg-libX11 xorg-libxcb python26 db46 gdbm sqlite3 xorg-libpthread-stubs xorg-xcb-proto xorg-util-macros xorg-xcmiscproto xorg-xextproto xorg-xf86bigfontproto xorg-xtrans xorg-renderproto cairo libpixman tcl
---> Configuring db46
Error: db46 requires the Java for Mac OS X development headers.
Error: Download the Java Developer Package from: <https://connect.apple.com/cgi-bin/WebObjects/MemberSite.woa/wa/getSoftware?bun dleID=20719>
Error: Target org.macports.configure returned: missing Java headers
Error: Failed to install db46
Log for db46 is at: /opt/local/var/macports/logs/ opt_local_var_macports_sources_rsync.macports.org_release_ports_databasesdb46/main.log
Error: The following dependencies were not installed: rrdtool pango Xft2 xrender xorg-libX11 xorg-libxcb python26 db46 gdbm sqlite3 xorg-libpthread-stubs xorg-xcb-proto xorg-util-macros xorg-xcmiscproto xorg-xextproto xorg-xf86bigfontproto xorg-xtrans xorg-renderproto cairo libpixman tcl
Error: Status 1 encountered during processing.
To report a bug, see <http://guide.macports.org/#project.tickets>


I asked for help in the community and they responded macport

Follow the directions. Apple, for whatever reason, moved one of the header
files from the runtime to the developer package as part of the 10.6.5
update; MacPorts has no control over this.

but when I do all the instructions the error still is repeated

how can I solve this problem