Download update version of chrome driver(in below code example E://chromedriver.exe) from http://code.google.com/p/chromedriver/downloads/list
public class ChromeTest {
public static void main(String[] args) {
System.setProperty("webdriver.chrome.driver", "E://chromedriver.exe");
WebDriver driver = new ChromeDriver();
driver.get("http://www.test.com");
}
}