wait（…）的所有变体都从以下代码引发以下异常。我究竟做错了什么？

java.lang.IllegalMonitorStateException
    at java.lang.Object.wait(Native Method)
    at java.lang.Object.wait(Object.java:485)
    at LoginPage.main(LoginPage.java:29)

try
        {
            driver.get("http://domain:port/coco/webapp/login/login.faces");

            driver.findElement(By.id("clientCode")).sendKeys("coco");
            driver.findElement(By.id("systemCode")).sendKeys("consumer");
            driver.findElement(By.id("userId")).sendKeys("ffadmin");
            driver.findElement(By.id("password")).sendKeys("password");

            driver.findElement(By.className("af_commandButton")).click();
            driver.wait();
            Assert.assertTrue(driver.getPageSource().contains("Administration"));

        }
        catch (Exception e)
        {
            e.printStackTrace();
        }