SystemClassLoaderTest.java 文件源码

public static void main(String[] args) throws Exception {
    // Instantiate the MBean server
    //
    System.out.println("Create the MBean server");
    MBeanServer mbs = MBeanServerFactory.createMBeanServer();

    ClassLoader mbsClassLoader = mbs.getClass().getClassLoader();

    String testClassName = Test.class.getName();

    // Check that the MBeanServer class loader does not know our test class
    try {
        Class.forName(testClassName, true, mbsClassLoader);
        System.out.println("TEST IS INVALID: MBEANSERVER'S CLASS LOADER " +
                           "KNOWS OUR TEST CLASS");
        System.exit(1);
    } catch (ClassNotFoundException e) {
        // As required
    }

    // Register the MBean
    //
    System.out.println("Create MBean from this class");
    ObjectName objectName = new ObjectName("whatever:type=whatever");
    mbs.createMBean(testClassName, objectName);
    // Test OK!
    //
    System.out.println("Bye! Bye!");
}