메소드 getSystemCpuLoad() : Returns the "recent cpu usage" for the whole system getTotalPhysicalMemorySize() :Returns the total amount of physical memory in bytes getFreePhysicalMemorySize() : Returns the amount of free physical memory in bytes. 테스트 코드 : CPU사용률, 메모리 잔여량, 전체 물리메모리량 package org.kyhslam.doit; import com.sun.management.OperatingSystemMXBean; import java.lang.management.ManagementFactor..