检测物理内存

package Test;

import java.lang.management.ManagementFactory;
import com.sun.management.OperatingSystemMXBean;

public class HH {
    public static void main(String[] args)
    {
    OperatingSystemMXBean operatingSystemMXBean=(OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
    System.out.println("系统物理内存总计：" + operatingSystemMXBean.getTotalPhysicalMemorySize() / 1024/1024 + "MB");
    System.out.println("系统物理可用内存总计：" + operatingSystemMXBean.getFreePhysicalMemorySize() / 1024/1024 + "MB");   
    }
}