java 7中新增的CPU和负载的监控详解编程语言

import java.lang.management.ManagementFactory; 
import java.lang.management.OperatingSystemMXBean; 
import java.lang.reflect.Method; 
 
/** 
 * Test 
 */ 
public class Test { 
 
    public static void main(String[] args) throws InterruptedException { 
        OperatingSystemMXBean operatingSystemMXBean = ManagementFactory.getOperatingSystemMXBean(); 
        while (true) { 
            double load; 
            try { 
                Method method = OperatingSystemMXBean.class.getMethod("getSystemLoadAverage"); 
                load = (Double)method.invoke(operatingSystemMXBean); 
            } catch (Throwable e) { 
                load = -1; 
            } 
            int cpu = operatingSystemMXBean.getAvailableProcessors(); 
            if (load >= cpu) { 
                System.err.println("WARN!!load:" + load + ","+ "cpu:" + cpu); 
            } 
            Thread.currentThread().sleep(1 * 1000); 
        } 
    } 
 
}