NetBeans 启动报错 JVM creation failed解决

前几天安装NetBeans后还曾用过，今天启动时却报了JVM creation failed，很明显，是java虚拟机加载失败，暂且这么描述吧，应该是与什么配置有关系。

尝试多次后找到原因：

NetBeans安装目录的etc下netbeans.conf文件中，

# ${HOME} will be replaced by JVM user.home system property
netbeans_default_userdir="${HOME}/.netbeans/7.0"

# Options used by NetBeans launcher by default, can be overridden by explicit
# command line switches:
netbeans_default_options="-J-client -J-Xss2m -J-Xms32m -J-XX:PermSize=32m -J-XX:MaxPermSize=384m -J-Dapple.laf.useScreenMenuBar=true -J-Dapple.awt.graphics.UseQuartz=true -J-Dsun.java2d.noddraw=true"
# Note that a default -Xmx is selected for you automatically.
# You can find this value in var/log/messages.log file in your userdir.
# The automatically selected value can be overridden by specifying -J-Xmx here
# or on the command line.

# If you specify the heap size (-Xmx) explicitly, you may also want to enable
# Concurrent Mark & Sweep garbage collector. In such case add the following
# options to the netbeans_default_options:
# -J-XX:+UseConcMarkSweepGC -J-XX:+CMSClassUnloadingEnabled -J-XX:+CMSPermGenSweepingEnabled
# (see http://wiki.netbeans.org/FaqGCPauses)

# Default location of JDK, can be overridden by using --jdkhome <dir>:
netbeans_jdkhome="c:\Program Files\Java\jdk1.7.0_02"

# Additional module clusters, using ${path.separator} (';' on Windows or ':' on Unix):
#netbeans_extraclusters="/absolute/path/to/cluster1:/absolute/path/to/cluster2"

# If you have some problems with detect of proxy settings, you may want to enable
# detect the proxy settings provided by JDK5 or higher.
# In such case add -J-Djava.net.useSystemProxies=true to the netbeans_default_options.

 

#表示注释，所以#部分不用看，只看没有加#的部分，问题在第二行没有加#的：

netbeans_default_options 有一个-J-XX:MaxPermSize=384m 的，

经几次尝试，修改成300也不可以，最后修改成256后启动成功。大概问题就是因为最大值过大，稍调整小一点就可以了。