java 7中新增的CPU和负载的监控

java 7中新增的CPU和负载的监控

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);

        }

    }

}