[java] Selenium using Java - The path to the driver executable must be set by the webdriver.gecko.driver system property

I am trying to launch Mozilla but still I am getting this error:

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 https://github.com/mozilla/geckodriver. The latest version can be downloaded from https://github.com/mozilla/geckodriver/releases

I am using Selenium 3.0.01 Beta version and Mozilla 45. I have tried with Mozilla 47 too. but still the same thing.

Selenium WebDriver Java code:

Download Gecko Driver from https://github.com/mozilla/geckodriver/releases based on your platform. Extract it in a location by your choice. Write the following code:

System.setProperty("webdriver.gecko.driver", "D:/geckodriver-v0.16.1-win64/geckodriver.exe");
WebDriver driver = new FirefoxDriver();
driver.get("https://www.lynda.com/Selenium-tutorials/Mastering-Selenium-Testing-Tools/521207-2.html");

Every Driver service in selenium calls the similar code(following is the firefox specific code) while creating the driver object

 @Override
 protected File findDefaultExecutable() {
      return findExecutable(
        "geckodriver", GECKO_DRIVER_EXE_PROPERTY,
        "https://github.com/mozilla/geckodriver",
        "https://github.com/mozilla/geckodriver/releases");
    }

now for the driver that you want to use, you have to set the system property with the value of path to the driver executable.

for firefox GECKO_DRIVER_EXE_PROPERTY = "webdriver.gecko.driver" and this can be set before creating the driver object as below

System.setProperty("webdriver.gecko.driver", "./libs/geckodriver.exe");
WebDriver driver = new FirefoxDriver();

I use from selenium-java-3.141.59 in windows 10 and solved my problem with this code:

System.setProperty("webdriver.gecko.driver", "C:\\gecko\\geckodriver.exe");
System.setProperty("webdriver.firefox.bin","C:\\Program Files\\Mozilla Firefox\\firefox.exe");
WebDriver driver = new FirefoxDriver();

in my case, I must to set path in properties file, in many hours I find the way:

application.properties file:

webdriver.gecko.driver="/lib/geckodriver-v0.26.0-win64/geckodriver.exe"

in java code:

private static final Logger log = Logger.getLogger(Login.class.getName());
private FirefoxDriver driver;
private FirefoxProfile firefoxProfile;
private final String BASE_URL = "https://www.myweb.com/";
private static final String RESOURCE_NAME = "main/resources/application.properties"; // could also be a constant
private Properties properties;

public Login() {
    init();
}

private void init() {
    properties = new Properties();
    try(InputStream resourceStream = getClass().getClassLoader().getResourceAsStream(RESOURCE_NAME)) {
        properties.load(resourceStream);
    } catch (IOException e) {
        System.err.println("Could not open Config file");
        log.log(Level.SEVERE, "Could not open Config file", e);
    }
    // open incognito tab by default
    firefoxProfile = new FirefoxProfile();
    firefoxProfile.setPreference("browser.privatebrowsing.autostart", true);
    // geckodriver driver path to run
    String gekoDriverPath = properties.getProperty("webdriver.gecko.driver");
    log.log(Level.INFO, gekoDriverPath);
    System.setProperty("webdriver.gecko.driver", System.getProperty("user.dir") + gekoDriverPath);
    log.log(Level.INFO, System.getProperty("webdriver.gecko.driver"));
    System.setProperty("webdriver.gecko.driver", System.getProperty("webdriver.gecko.driver").replace("\"", ""));
    if (driver == null) {
        driver = new FirefoxDriver();
    }

}

1. Download gecko driver from the seleniumhq website (Now it is on GitHub and you can download it from Here) .
   2. You will have a zip (or tar.gz) so extract it.
   3. After extraction you will have geckodriver.exe file (appropriate executable in linux).
   4. Create Folder in C: named SeleniumGecko (Or appropriate)
   5. Copy and Paste geckodriver.exe to SeleniumGecko
   6. Set the path for gecko driver as below

.

System.setProperty("webdriver.gecko.driver","C:\\geckodriver-v0.10.0-win64\\geckodriver.exe");
WebDriver driver = new FirefoxDriver();