Is it possible to subclass a Java object in the constructor?

I am a Java newbie trying out Selenium example in a faq, http://code.google.com/p/selenium/wiki/FrequentlyAskedQuestions#Q:_How_do_I_handle_authentication_with_the_? where there is a note about how to modify an HtmlUnitDriver driver object to support authentication with some demo code I have repeated here.

After some asking in a stackoverflow thread https://stackoverflow.com/questions/6605308/is-it-possible-to-subclass-a-java-object-in-the-constructor and learning more about Java, anonymous classes and overrides this is my current code, but I am getting a syntax error on the DefaultCredentialsProvider in Netbeans, and I am not sure whether it is due to the absence of required classes, or whether some more changes are required.

 * To change this template, choose Tools | Templates
 * and open the template in the editor.
package seleniumtest01;

 * @author richard
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.support.ui.ExpectedCondition;
import org.openqa.selenium.support.ui.WebDriverWait;
import org.openqa.selenium.htmlunit.HtmlUnitDriver;
import com.gargoylesoftware.htmlunit.DefaultCredentialsProvider;
import com.gargoylesoftware.htmlunit.WebClient;
//import org.openqa.selenium.htmlunit.ChromeDriver;

public class Main {

  public static void main(String[] args) {
    // Create a new instance of the Firefox driver
    // Notice that the remainder of the code relies on the interface,
    // not the implementation.

  public static void testBasicAuth() {
    // Create a new instance of the Firefox driver
    // Notice that the remainder of the code relies on the interface,
    // not the implementation.
    //WebDriver driver = new FirefoxDriver();
    WebDriver driver = new HtmlUnitDriver() {

      protected WebClient modifyWebClient(WebClient client) {
        // This class ships with HtmlUnit itself
        DefaultCredentialsProvider creds = DefaultCredentialsProvider();

        // Set some example credentials
        creds.addCredentials("username", "password");

        // And now add the provider to the webClient instance

        return client;
    driver.get("http://user:[email protected]/");
    new WebDriverWait(driver, 10);

    WebElement element = driver.findElement(By.xpath("//a[text()='Connection']"));
    //element = driver.findElement(By.xpath("//a[text()='Admin Login']"));
    element = driver.findElement(By.xpath("//a[contains(@href, 'admin/connection')]"));//[contains(@href,'#id1')]
    element = driver.findElement(By.xpath("//a[text()='Connection 1']"));
    element = driver.findElement(By.name("field_one"));
    element.sendKeys("sample text");
    //driver.findElement(By. id("submit")).click();

    new WebDriverWait(driver, 10);


Bear with me, I learning Java via Selenium.

1 Answer 1


Try changing this:

DefaultCredentialsProvider creds = DefaultCredentialsProvider();

to this:

DefaultCredentialsProvider creds = new DefaultCredentialsProvider();
  • nice hack, I will try it next time when creating new instance ;)
    – yoosiba
    Jul 8, 2011 at 9:02
  • @yoossiba, it's not a hack, it's proper syntax to construct objects in Java.
    – dzieciou
    Jun 7, 2014 at 8:10

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.