Why Do I Get 'java.lang.NoClassDefFoundError: org/openqa/selenium/WebDriver' in Selenium WebDriver?

Exception: "java.lang.NoClassDefFoundError: org/openqa/selenium/WebDriver" in Selenium Webdriver

Despite adding the latest Selenium dependency in your pom.xml and importing the appropriate classes, you encounter the "java.lang.NoClassDefFoundError" exception when running your main method. This indicates that the necessary Selenium WebDriver class cannot be found.

Possible Causes:

• Mismatched Directory Structure: The Selenium documentation may have outdated information as the latest version of Selenium is organized under the "seleniumhq" folder in your local Maven repository, not "openqa."
• Eclipse IDE Configuration: If you're using Eclipse, ensure that the Selenium jars are added to your project's Classpath instead of Modulepath. Additionally, perform a Clean and Run to clear any cached builds.

Solution:

1. Verify that the Selenium dependency in your pom.xml is up-to-date and includes the "seleniumhq" group ID.
2. Go to your Eclipse project properties and add the Selenium jars to the Classpath.
3. Perform a Clean and Run to rebuild and execute your application.

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