Executing a class in jar file

Question

I have created an application that uses selenium-server-standalone-2.47.1.jar and javax.mail.jar. The code works on eclipse, but I would like to run the same from command line. So I exported the project to a runnable jar file which contains both selenium and javax.mail.jar. My code contains RTC.java which has the Main function and another Ex.java. Both the class files are generated in com folder. My App1.jar file is located in C:\installers.

I used the command:

 c:\installers> java -cp App1.jar com.RTC

It says:

Exception in thread "main" java.lang.NoClassDefFoundError: org.openqa.selenium.WebDriver

Further I used:

 java -cp .App1.jar com.RTC

Then it says could not find or load main class com.RTC.

What am I doing wrong?

I extracted the selenium jar file. There exists org.openqa.selenium.WebDriver.class — Ansu, Aug 18 '15 at 06:01
possible duplicate of [How to Solve java.lang.NoClassDefFoundError?](http://stackoverflow.com/questions/17973970/how-to-solve-java-lang-noclassdeffounderror) — connorp, Aug 18 '15 at 06:03
@Ansu Well there's your problem. It should be ’org/openqa/selenium/WebDriver.class`. — user207421, Aug 18 '15 at 06:06
im sorry, but i dont understand. All I meant is there is a WebDriver.class in the folder selenium. — Ansu, Aug 18 '15 at 07:16

score 0 · Answer 1 · answered Aug 18 '15 at 06:04

I used the command:

c:\installers> java -cp App1.jar com.RTC

It says:

Exception in thread "main" java.lang.NoClassDefFoundError:
org.openqa.selenium.WebDriver

That exception usually means that a .class file was found but it didn't contain the right class. Check how you're putting it into the JAR. It's directory and file name must match its package and class name.

It sometimes also seems to mean that a secondary class wasn't found. Normally secondary JAR files are mentioned in the class-path entry of the manifest of the main JAR file, along with the main-classname, so you can use

java -jar App1.jar

Further I used:

java -cp .App1.jar com.RTC

Then it says could not find or load main class com.RTC.

I'm not surprised. If the first command got as far as it did, the JAR filename doesn't start with a dot. Cannot imagine why you tried this. It is nonsense.

score 0 · Accepted Answer · answered Aug 18 '15 at 10:26

I found the solution. I need not create a jar file which has the reference jars. I have to mention my jar which has my code and the reference jars that I am using in the class path.

My code is in App.jar.The reference jars are

selenium-server-standalone-2.47.1.jar and javax.mail.jar.

so I used c:\installers> java -cp selenium-server-standalone-2.47.1.jar;javax.mail.jar;App.jar com.RTC

Thank You.

Executing a class in jar file

2 Answers2