NoClassDefFoundError in Java: com/google/common/base/Function

I had the same problem, and finally I found that I forgot to add the selenium-server-standalone-version.jar. I had only added the client jar, selenium-java-version.jar.

Hope this helps.

A NoClassDefFoundError is thrown when the JRE can't find a class. In your case, it can't find the class com.google.common.base.Function, which you most probably did not add to your classpath.

EDIT

After downloading the following libraries:

• Selenium: http://code.google.com/p/selenium/downloads/list
• Guava: http://code.google.com/p/guava-libraries/downloads/list
• Apache HttpComponents: http://hc.apache.org/downloads.cgi
• JSON jar: http://www.jarfinder.com/index.php/jars/versionInfo/21653

and unzipping them and putting all JAR files in a folder called lib, the test class:

import org.openqa.selenium.firefox.FirefoxDriver;public class Test {    public static void main(String[] args) {        try{            FirefoxDriver driver = new FirefoxDriver();            driver.get("http:www.yahoo.com");        } catch(Exception e){            e.printStackTrace();        }    }}

ran without any problems.

You can compile and run the class as follows:

# compile and run on Linux & Macjavac -cp .:lib/* Test.java java -cp .:lib/* Test# compile and run on Windowsjavac -cp .;lib/* Test.java java -cp .;lib/* Test

I encountered the same error and after the investigation, I found that library selenium-api 2.41.0 requires guava 15.0 but it was overridden by an older version so I declared guava 15.0 as a direct dependency by adding following configuration in pom.xml:

<dependency>        <artifactId>guava</artifactId>        <groupId>com.google.guava</groupId>        <type>jar</type>        <version>15.0</version></dependency>