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

Solution 1:

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.

Solution 2:

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 & Mac
javac -cp .:lib/* Test.java 
java -cp .:lib/* Test

# compile and run on Windows
javac -cp .;lib/* Test.java 
java -cp .;lib/* Test