title: Firefox browser is not opening with selenium webbrowser code
body: <p>Need guidance and help in the below one.</p>
  
  <p>When the below code is executed, I am getting error. I am using the latest version of java, eclipse, firefox, and WebDrive jar file.</p>
  
  <pre><code>package firsttest1;
  import org.openqa.selenium.WebDriver;
  import org.openqa.selenium.firefox.FirefoxDriver;
  public class helloselenium {
      public static void main(String[] args) {
          WebDriver driver;
          driver =new FirefoxDriver();
          String url ="http://www.google.com";
          driver.get(url);
      }
  }
  </code></pre>
  
  <p><strong>error....</strong></p>
  
  <blockquote>
    <p>Exception in thread "main" java.lang.IllegalStateException: The path to the driver executable must be set by the webdriver.gecko.driver system property; for more information, see <a href="https://github.com/mozilla/geckodriver">https://github.com/mozilla/geckodriver</a>. The latest version can be downloaded from <a href="https://github.com/mozilla/geckodriver/releases">https://github.com/mozilla/geckodriver/releases</a> 
        at com.google.common.base.Preconditions.checkState(Preconditions.java:199)
        at     org.openqa.selenium.remote.service.DriverService.findExecutable(DriverService.java:109)
        at org.openqa.selenium.firefox.GeckoDriverService.access$100(GeckoDriverService.java:38)
        at org.openqa.selenium.firefox.GeckoDriverService$Builder.findDefaultExecutable(GeckoDriverService.java:91)
        at org.openqa.selenium.remote.service.DriverService$Builder.build(DriverService.java:296)
        at org.openqa.selenium.firefox.FirefoxDriver.createCommandExecutor(FirefoxDriver.java:245)
        at org.openqa.selenium.firefox.FirefoxDriver.(FirefoxDriver.java:220)
        at org.openqa.selenium.firefox.FirefoxDriver.(FirefoxDriver.java:215)
        at org.openqa.selenium.firefox.FirefoxDriver.(FirefoxDriver.java:211)
        at org.openqa.selenium.firefox.FirefoxDriver.(FirefoxDriver.java:124)
        at firsttest1.helloselenium.main(helloselenium.java:12)</p>
  </blockquote>
  
  <p>Version used:
  eclipse : neon version
  java : jdk1.8 
  fire fox: v48
  WebDrive jar file : v 3.0.0 beta2 </p>
  
  <p>guide me in resolving this issue.</p>