Java implementation compute process CPU usage

Code Sample:

MAVEN Package

<project xmlns= "http://maven.apache.org/POM/4.0.0" xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance" xsi: schemalocation= "http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" > < Modelversion>4.0.0</modelversion> <groupId>com.zetyun.mml</groupId> <artifactId> My-mml</artifactid> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> & lt;name>my-mml</name> <url>http://maven.apache.org</url> <properties> <projec T.build.sourceencoding>utf-8</project.build.sourceencoding> <maven.compiler.source>1.8</maven  
  
  
  .compiler.source> <maven.compiler.target>1.8</maven.compiler.target> </properties> <build> <defaultGoal>compile</defaultGoal> <plugins> ;p lugin> <artifactid>maven-assembly-Plugin</artifactid> <configuration> <archive> </archive> <descriptorRefs> <descriptorref>jar-with-  
                Dependencies</descriptorref> </descriptorRefs> </configuration> <executions> <execution> <id>make-asse  
                            Mbly</id> <phase>package</phase> <goals> <goal>single</goal> </goals> &L t;/execution> </executions> </plugin> </plugins> < /build> <repositories><!--code base--> <repository> <id>maven-  
       Ali</id>     <url>http://maven.aliyun.com/nexus/content/groups/public</url> <releases>  
                <enabled>true</enabled> </releases> <snapshots>  
                <enabled>true</enabled> <updatePolicy>always</updatePolicy> <checksumPolicy>fail</checksumPolicy> </snapshots> </repository> &L t;/repositories> <dependencies> <dependency> <groupId>junit</groupId> <
    Artifactid>junit</artifactid> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>com.danielflower.apprunner</groupId> <ar tifactid>javasysmon</artifactid> <version>0.3.5.0</version> </dependency> </ Dependencies> &LT;/PROject>
 

Package com.zetyun.mml.base;
Import Com.jezhumble.javasysmon.CpuTimes;
Import Com.jezhumble.javasysmon.JavaSysMon;

Import Com.jezhumble.javasysmon.ProcessInfo;
		public class Javasysmonutils {public static void main (string[] args) {String pid;
		String period;

		Javasysmon monitor = new Javasysmon ();
			if (args.length!= 2) {pid = string.valueof (Monitor.currentpid ());
		Period = "5000";
			else {pid = args[0];
		period = args[1];
			} while (true) {String processusage = String.Format ("%.2f", Getprocessusage (monitor, PID, period) * 100);
			System.out.println (Processusage);
		System.out.println ("------------------------------------");
	}//Getprocsscpuuage (); private static float getprocessusage (Javasysmon Monitor, string pid, String period) {Long Cputotaltimebegin = getc
		Putotaltime (monitor);

		Long Processtotaltimebegin = getprocesstotaltimebypid (monitor, Integer.parseint (PID));
		try {thread.sleep (Long.parselong (period)); catch (InterruPtedexception e) {//TODO auto-generated catch block E.printstacktrace ();
		Long cputotaltimeend = getcputotaltime (monitor);

		Long processtotaltimeend = getprocesstotaltimebypid (monitor, Integer.parseint (PID)); float processusage = (float) (processtotaltimeend-processtotaltimebegin)/(float) (Cputotaltimeend-cputotaltimebe

		gin);

	return processusage;
	private static long Getcputotaltime (Javasysmon monitor) {return monitor.cputimes (). Gettotalmillis (); private static long Getprocesstotaltimebypid (Javasysmon monitor, int pid) {ProcessInfo ProcessInfo = Findprocessby

		PID (monitor, PID);
		if (ProcessInfo = = null) {return 0;

	return Processinfo.getsystemmillis () + Processinfo.getusermillis (); public static ProcessInfo Findprocessbypid (Javasysmon monitor, int pid) {processinfo[] Processinfos = Monitor.proc

		Esstable ();
	for (ProcessInfo Processinfo:processinfos) {if (PID = = Processinfo.getpid ()) {return processinfo;		} return null;

		public static void Getcpuusge () {Javasysmon monitor = new Javasysmon ();

			while (true) {Cputimes cputimes = Monitor.cputimes ();

			System.out.println ("\ n--------------------");
			try {thread.sleep (5000);
			catch (Interruptedexception e) {//TODO auto-generated catch block E.printstacktrace ();

			} cputimes CpuTimes2 = Monitor.cputimes ();

			String CPUUsage = String.Format ("%.5f", Cputimes2.getcpuusage (Cputimes));

		System.out.println ("CPUUsage:" + cpuusage);
 }

	}

}