Vitaly Vitaly - 1 year ago 120
Java Question

Why sun.management.OperatingSystemImpl is package visible?

This class has really helpful methods. I can call them by reflection.
But why I forced to do it?

I would like to cast OperatingSystemMXBean to OperatingSystemImpl and call them normal way.

Thanks in advance.

Answer Source

can you explain why you would like to cast OperatingSystemMXBean to OperatingSystemImpl since OperatingSystemImpl implements OperatingSystemMXBean.

you can use it

    java.lang.management.OperatingSystemMXBean os = java.lang.management.ManagementFactory.getOperatingSystemMXBean();
    System.out.println(os.getArch());

or

    com.sun.management.OperatingSystemMXBean osBean = ManagementFactory
            .getPlatformMXBean(com.sun.management.OperatingSystemMXBean.class);
    System.out.println(osBean.getProcessCpuLoad() * 100);
    System.out.println(osBean.getSystemCpuLoad() * 100);
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