Out of curiosity I installed it and ran it from a terminal on my 64-bit KDE desktop. The terminal is full of Glib-GObject-Critical and Glib-GObject-Warning messages, but the package opens and responds to my clicking around in it. I don't know how to use it and "play" did not produce any music -- I'm not sure whether that is an error or just my ignorance of how to use it. I did not see any java messages, and I do not have any of your listed java-related packages installed on this system. If you want more details, I can provide them.
Edit: After further playing around, I went into "Composition > Properties", and when I canceled on that dialog, it crashed. Here is the end of the terminal output:
(TuxGuitar:22337): GLib-GObject-WARNING **: /tmp/buildd/glib2.0-2.40.0/./gobject/gclosure.c:688: unable to remove uninstalled invalidation notifier: 0x7fc8e2a52e00 (0x7fc928c30d70)
(TuxGuitar:22337): GLib-GObject-CRITICAL **: g_object_get_qdata: assertion 'G_IS_OBJECT (object)' failed
(TuxGuitar:22337): GLib-GObject-CRITICAL **: g_object_get_qdata: assertion 'G_IS_OBJECT (object)' failed
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007fc8e2a4c718, pid=22337, tid=140502067345152
#
# JRE version: OpenJDK Runtime Environment (7.0_55-b14) (build 1.7.0_55-b14)
# Java VM: OpenJDK 64-Bit Server VM (24.51-b03 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# C [libgobject-2.0.so.0+0x19718] g_object_get_qdata+0x18
#
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /home/don/hs_err_pid22337.log
Compiled method (nm) 1566145 96 n org.eclipse.swt.internal.gtk.OS::_g_object_get_qdata (native)
total in heap [0x00007fc9250d3c90,0x00007fc9250d4010] = 896
relocation [0x00007fc9250d3db0,0x00007fc9250d3e10] = 96
main code [0x00007fc9250d3e20,0x00007fc9250d4010] = 496
#
# If you would like to submit a bug report, please include
# instructions on how to reproduce the bug and visit:
# http://icedtea.classpath.org/bugzilla
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
Aborted