Example.java

import com.opera.core.systems.*;
import org.openqa.selenium.*;
import org.openqa.selenium.remote.RemoteWebDriver;
import java.util.*;
import org.openqa.selenium.interactions.*;

class Example {

  static RemoteWebDriver driver;

  public static void main(String[] args) {
    driver = new OperaDriver();

    driver.get("http://localhost:8080/opera/pages/index.jsf");

    // click modal panel
    // Remove this line and the XPaths work
    driver.findElementById("baseForm:cbShowPanel").click();
    try { Thread.sleep(3000); } catch (Exception e) {}
    // get user types
    System.out.println(driver.findElementsById("stammdatenForm"));
    System.out.println(driver.findElementsByXPath("//*[@id='stammdatenForm']"));
    System.out.println(driver.findElementsByXPath("//*[@id='stammdatenForm:userTypeInput']"));
    System.out.println(driver.findElementsByXPath("//*[@id='stammdatenForm:userTypeInput']/option"));
    System.out.println(driver.findElementsByXPath("//select[@id='stammdatenForm:userTypeInput']/option"));

    driver.quit();
  }
}