question: public static void init ( ) { OperatingSystemMXBean osStatsBean = ManagementFactory . getOperatingSystemMXBean ( ) ; if ( osStatsBean instanceof UnixOperatingSystemMXBean ) { stats = ( ( UnixOperatingSystemMXBean ) osStatsBean ) ; } else { throw new RuntimeException ( "Unexpected OperatingSystemMXBean " + osStatsBean ) ; } memoryStats = ManagementFactory . getMemoryMXBean ( ) ; }
target:  Initializes system metrics internals.