Java获取系统信息(cpu,内存,硬盘,进程等)的相关方法.docVIP

java获取系统信息（CPU，内存，硬盘，进程）的相关方法 一、这是一个获取相关信息的简单的方法 import java.io.*; import com.sun.management.OperatingSystemMXBean; import sun.management.ManagementFactory; public class Tst{ public static String pt=D:\\abc.txt; public Tst(){ } public static void main(String[] args) throws Exception{ //free和use和total均为KB long free=0; long use=0; long total=0; int kb=1024; Runtime rt=Runtime.getRuntime(); total=rt.totalMemory(); free=rt.freeMemory(); use=total-free; System.out.println(系统内存已用的空间为：+use/kb+ MB); System.out.println(系统内存的空闲空间为：+free/kb+ MB); System.out.println(系统总内存空间为：+total/kb+ MB); OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean(); long physicalFree=osmxb.getFreePhysicalMemorySize()/kb; long physicalTotal=osmxb.getTotalPhysicalMemorySize()/kb; long physicalUse=physicalTotal-physicalFree; String os=System.getProperty(); System.out.println(操作系统的版本：+os); System.out.println(系统物理内存已用的空间为：+physicalFree+ MB); System.out.println(系统物理内存的空闲空间为：+physicalUse+ MB); System.out.println(总物理内存：+physicalTotal+ MB); // 获得线程总数 ThreadGroup parentThread; for (parentThread = Thread.currentThread().getThreadGroup(); parentThread .getParent() != null; parentThread = parentThread.getParent()) ; int totalThread = parentThread.activeCount(); System.out.println(获得线程总数:+totalThread); } } 二，别的方法技巧 1.利用jdk自带的API获取信息：（只支持jdk1.60以上的版本啊） import java.io.InputStreamReader;import java.io.LineNumberReader;import java.util.ArrayList;import java.util.List; import .sun.management.OperatingSystemMXBean;import mytools.java.io.File;import mytools.java.lang.management.ManagementFactory;/**?* 获取windows系统信息（CPU,内存,文件系统）?* @author libing?*?*/ public class WindowsInfoUtil {??? private static final int CPUTIME = 500;??? private static final int PERCENT = 100;??? private static final int FAULTLENGTH = 10; ?? ?public static void main(String[] arg