vSphere API - Change VNC settings

changevnc.java

public static void doChangeVnc(String url, String username, String password, String vmname, String vncport) throws Exception
{
    ServiceInstance si = new ServiceInstance(new URL(url), username, password, true);
    Folder rootFolder = si.getRootFolder();
    VirtualMachine vm = null;

    vm = (VirtualMachine) new InventoryNavigator(rootFolder).searchManagedEntity("VirtualMachine", vmname);

    if(vm==null)
    {
        System.out.println("VM not found");
        return;
    }

    VirtualMachineConfigSpec vms = new VirtualMachineConfigSpec();
    OptionValue opt = new OptionValue();
    opt.setKey("remotedisplay.vnc.port");
    opt.setValue(vncport);
    OptionValue opt2 = new OptionValue();
    opt2.setKey("remotedisplay.vnc.enabled");
    opt2.setValue("TRUE");

    vms.extraConfig = new OptionValue[] { opt, opt2 };
    Task task = vm.reconfigVM_Task(vms);
    String result = task.waitForMe();

    System.out.println("Successfully changed VNC port on " + vmname + " to " + vncport);
}