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Java获取系统信息(cpu,内存,硬盘,进程等)的相关方法.doc

发布:2017-08-10约1.88万字共20页下载文档
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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
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