删除了原有的JRockit,即使重装JDK,依然报错,猜测是NB的环境变量的问题,果然:地址为:C:\Program Files\NetBeans 7.2\etc\netbeans.CONF
# Default locations of userdir and cachedir:
# (http://wiki.netbeans.org/FaqWhatIsUserdir)
#
# On Windows ${DEFAULT_USERDIR_ROOT} will be replaced by the launcher
# with "<AppData>\NetBeans" where <AppData> is user's
# value of "AppData" key in Windows Registry under
# "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders"
# and ${DEFAULT_CACHEDIR_ROOT} will be replaced by the launcher
# with "<Local AppData>\NetBeans\Cache" where <Local AppData> is user's
# value of "Local AppData" key in Windows Registry under
# "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders"
#
# On Mac ${DEFAULT_USERDIR_ROOT} will be replaced by the launcher
# with "~/Library/Application Support/NetBeans" and
# ${DEFAULT_CACHEDIR_ROOT} with "~/Library/Caches/NetBeans"
#
# On other systems ${DEFAULT_USERDIR_ROOT} will be replaced by the launcher
# with "~/.netbeans" and ${DEFAULT_CACHEDIR_ROOT} with "~/.cache/netbeans"
#
# You can also use ${HOME} variable which will be replaced with
# user.home JVM system property value. This variable is valid only in
# netbeans_default_userdir and netbeans_default_cachedir properties.
#
# NOTE: If you specify a non-default userdir path on command line
# (--userdir option) and don't specify a cachedir path (--cachedir option),
# cachedir will be in "<userdir>/var/cache".
#
# Cachedir must be different from userdir. The same cachedir and userdir
# would cause problems.
#
netbeans_default_userdir="${DEFAULT_USERDIR_ROOT}/7.2"
netbeans_default_cachedir="${DEFAULT_CACHEDIR_ROOT}/7.2"
# Options used by NetBeans launcher by default:
# (can be overridden by explicit command line switches)
#
# Note that default -Xmx and -XX:MaxPermSize are selected for you automatically.
# You can find these values in var/log/messages.log file in your userdir.
# The automatically selected value can be overridden by specifying -J-Xmx or
# -J-XX:MaxPermSize= here or on the command line.
#
# If you specify the heap size explicitly, you may also want to enable
# Concurrent Mark & Sweep garbage collector.
# (see http://wiki.netbeans.org/FaqGCPauses)
#
netbeans_default_options="-J-client -J-Xss2m -J-Xms1024m -J-XX:PermSize=128m -J-Dapple.laf.useScreenMenuBar=true -J-Dapple.awt.graphics.UseQuartz=true -J-Dsun.java2d.noddraw=true -J-Dsun.zip.disableMemoryMapping=true"
# Default location of JDK:
# (set by installer or commented out if launcher should decide)
#
# It can be overridden on command line by using --jdkhome <dir>
# Be careful when changing jdkhome.
# There are two NetBeans launchers for Windows (32-bit and 64-bit) and
# installer points to one of those in the NetBeans application shortcut
# based on the Java version selected at installation time.
#
netbeans_jdkhome="C:\jdk1.6.0_35"
# Additional module clusters:
# using ${path.separator} (';' on Windows or ':' on Unix):
#
#netbeans_extraclusters="/absolute/path/to/cluster1:/absolute/path/to/cluster2"
解决!