java.lang.management
接口 
ClassLoadingMXBean
CompilationMXBean
GarbageCollectorMXBean
MemoryManagerMXBean
MemoryMXBean
MemoryPoolMXBean
OperatingSystemMXBean
RuntimeMXBean
ThreadMXBean
 
LockInfo
ManagementFactory
ManagementPermission
MemoryNotificationInfo
MemoryUsage
MonitorInfo
ThreadInfo
枚举 
MemoryType