java如何获取系统CPU、内存占用

import java.lang.management.ManagementFactory;
import com.sun.management.OperatingSystemMXBean;
 
private static OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
public static int cpuLoad() {
 double cpuLoad = osmxb.getSystemCpuLoad();
 int percentCpuLoad = (int) (cpuLoad * 100);
 return percentCpuLoad;

}

import java.lang.management.ManagementFactory;
import com.sun.management.OperatingSystemMXBean;
 
private static OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
public static int memoryLoad() {
 double totalvirtualMemory = osmxb.getTotalPhysicalMemorySize();
 double freePhysicalMemorySize = osmxb.getFreePhysicalMemorySize();
  
 double value = freePhysicalMemorySize/totalvirtualMemory;
 int percentMemoryLoad = (int) ((1-value)*100);
 return percentMemoryLoad;

}