java.lang.NoClassDefFoundError: com/google/common/collect/ImmutableMap error using GeckoDriver Firefox through Selenium in Java

I am using this code and it is giving me this error:

Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/collect/ImmutableMap
        at org.openqa.selenium.firefox.FirefoxDriver.<clinit>FirefoxDriver.java:108)
        at Selenium_1.main(Selenium_1.java:13)
    Caused by: java.lang.ClassNotFoundException: com.google.common.collect.ImmutableMap
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 2 more

Unable to solve it. I am working in eclipse, could you please help me out.

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
//comment the above line and uncomment below line to use Chrome
//import org.openqa.selenium.chrome.ChromeDriver;

public class Selenium_1 {
        public static void main(String[] args) {
            // declaration and instantiation of objects/variables
            System.setProperty("webdriver.firefox.marionette","C:\\Program Files\\Java\\jre1.8.0_231\\lib\\ext\\geckodriver.exe");
            //System.setProperty("webdriver.chrome.driver", "/path/to/chrome driver");
            WebDriver driver = new FirefoxDriver();
            //comment the above 2 lines and uncomment below 2 lines to use Chrome
            //System.setProperty("webdriver.chrome.driver","G:\\chromedriver.exe");
            //WebDriver driver = new ChromeDriver();

            String baseUrl = "http://demo.guru99.com/test/newtours/";
            String expectedTitle = "Welcome: Mercury Tours";
            String actualTitle = "";

            // launch Fire fox and direct it to the Base URL
            driver.get(baseUrl);

            // get the actual value of the title
            actualTitle = driver.getTitle(); 

            /*
             * compare the actual title of the page with the expected one and print
             * the result as "Passed" or "Failed"
             */
            if (actualTitle.contentEquals(expectedTitle)){
                System.out.println("Test Passed!");
            } else {
                System.out.println("Test Failed");
            }



            //close Fire fox
            driver.close();
        }
    }

Please let me know if you need to know anything else... i am totally stuck... HELP! HELP! HELP!

This error message...

Exception in thread "main" java.lang.NoClassDefFoundError: com/google/common/collect/ImmutableMap
    at org.openqa.selenium.firefox.FirefoxDriver

...implies that the file com/google/common/collect/ImmutableMap might be corrupted or there is some incompatibility between the version of the binaries you are using specifically with the guava version / dependency (maven).

You need to take care of a couple of things as follows:

• In the System.setProperty() line you need to change webdriver.firefox.marionette to webdriver.gecko.driver. So effectively, the line of code will be:

  System.setProperty("webdriver.gecko.driver","C:\\Program Files\\Java\\jre1.8.0_231\\lib\\ext\\geckodriver.exe");
  

• Incase you are using maven deleting the corrup/incompatible .m2 folder can solve your issue.

• Upgrade JDK to recent levels JDK 8u222.

• Upgrade Selenium to current levels Version 3.141.59.

• Upgrade GeckoDriver to GeckoDriver v0.26.0 level.

• GeckoDriver is present in the desired location.

• GeckoDriver is having executable permission for non-root users.

• Upgrade Firefox version to Firefox v70.0 levels.

• Clean your Project Workspace through your IDE and Rebuild your project with required dependencies only.

• (WindowsOS only) Use CCleaner tool to wipe off all the OS chores before and after the execution of your Test Suite.

• (LinuxOS only) Free Up and Release the Unused/Cached Memory in Ubuntu/Linux Mint before and after the execution of your Test Suite.

• If your base Web Client version is too old, then uninstall it through Revo Uninstaller and install a recent GA and released version of Web Client.

• Take a System Reboot.

• Execute your Test as a non-root user.

• Always invoke driver.quit() within tearDown(){} method to close & destroy the WebDriver and Web Client instances gracefully.

Reference

You can find a relevant discussion in:

• org.openqa.selenium.remote.service.DriverService$Builder.createArgs()Lcom/google/common/collect/ImmutableList; with Selenium 3.5.3 Chrome 76