大家好我想问一下在：main.java中{
写入
MBeanServer mbss = ManagementFactory.getPlatformMBeanServer();
ObjectName name = new ObjectName("com.haitao.jmx:type=Echo");
mbs.registerMBean(mbean, name);
}
在同包下运行Test.java{
mBeanServer = (MBeanServer) MBeanServerFactory.findMBeanServer(null).get(0);
获取的mBeanServer为空
}
怎么回事，我在main中以ManagementFactory中有了专门的MBeanServer的实例，为什么获取不到已有的mBeanServer
