class not found error in java when compiling a project with libraries

Question

I have created a project in eclipse and added jdbc jar library successfully.When I run the program in eclipse I see no error but When I type:

 javac *.java

in console no problem occur but later when I type

java Runner

I get "java.lang.ClassNotFoundException: com.mysql.jdbc.Driver" and more errors related to this."Runner" is the class which has the main method. But in eclipse eveyrthing was working fine.

score 1 · Answer 1 · answered Jan 23 '14 at 10:40

This means com.mysql.jdbc.Drive is not on your classpath at runtime when you run your program outside of Eclipse. Add it to your classpath.

Try java -classpath or java -cp.

Try also java -help for help and additional details.

See also: http://reins.altervista.org/java/A_Collection_of_JVM_Options_MP.html

score 0 · Answer 2 · answered Jan 23 '14 at 10:40

0

You need the jar file at run time as well.

Use java -cp pathToYourJar Runner

answered Jan 23 '14 at 10:40

Aniket Thakur

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I have put my jar file to the lib directory of the directory where other class files exist but still getting the same error .my command is: java -cp /home/project/443/lib:. Runner – Emrah Jan 23 '14 at 11:45
What is your jar name? – Aniket Thakur Jan 23 '14 at 12:34

score 0 · Answer 3 · answered Jan 23 '14 at 10:40

0

Because eclipse already has a classpath, when running from command line you need to specify it also.

answered Jan 23 '14 at 10:40

Eugene

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score 0 · Answer 4 · edited May 23 '17 at 10:31

0

As the others say, you need to pass to javac command the classpath, the way to do it is explained in the following question

Including jars in classpath on commandline (javac or apt)

edited May 23 '17 at 10:31

Community

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answered Jan 23 '14 at 10:45

iouardi

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class not found error in java when compiling a project with libraries

4 Answers4