While googling, I discovered, this problem may be overpassed with the installed libbatik-java package and running netbeans from command line with the following parameters:
$ netbeans -cp:a /usr/share/java/batik-ext.jar P.S. Please, rename topic to "Netbeans GUI editor is not loading", so it described correctly the occured problem. __ This is the maintainer address of Debian's Java team <http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-java-maintainers>. Please use debian-j...@lists.debian.org for discussions and questions.