javaϵͳ¼à¿ØCPU ´ÅÅÌ

import java.io.*;   
  
/**
* linux ÏÂcpu ÄÚ´æ ´ÅÅÌ jvmµÄʹÓüà¿Ø
* @author avery_leo
*
*/  
public class TT {   
    /**
      * »ñÈ¡cpuʹÓÃÇé¿ö
      * @return
      * @throws Exception
      */  
    public double getCpuUsage() throws Exception {   
        double cpuUsed = 0;   
  
         Runtime rt = Runtime.getRuntime();   
         Process p = rt.exec("top -b -n 1");// µ÷ÓÃϵͳµÄ“top"ÃüÁî   
       
  
         BufferedReader in = null;   
        try {   
             in = new BufferedReader(new InputStreamReader(p.getInputStream()));   
             String str = null;   
             String[] strArray = null;   
           
            while ((str = in.readLine()) != null) {   
                int m = 0;   
                   
                if (str.indexOf(" R ") != -1) {// Ö»·ÖÎöÕýÔÚÔËÐеĽø³Ì£¬top½ø³Ì±¾Éí³ýÍâ &&am