Untitled

WebDriver driver = new HtmlUnitDriver();
driver.get("http://www.google.com");
System.out.println(driver.getPageSource());

<?xml version="1.0" encoding="UTF-8"?>
<html>
  <head/>
  <body/>
</html>

WebDriver driver = new HtmlUnitDriver();
driver.setJavascriptEnabled(true)
driver.get("http://www.google.com");
System.out.println(driver.getPageSource());