CODEWITHSUNDEEP
javaeclipse
Jayanga Kaushalya
Jayanga Kaushalya

Reputation: 2744

Adding External jar's in Eclipse

I have created a program to connect to MySQL. I add Connector/j using eclipse add external jar option. Program works fine in eclipse. But when I created the executable jar using eclipse and when i run it, it always give ClassNotFoundException. Please tell me how to add external jars to my jar. Or is there any other error? Please can anyone help me.

Upvotes: 1

Views: 660

Answers (3)

scott
scott

Reputation: 974

The simplest solution is to export your project as a 'Runnable Jar file' (Right-click on project->Export...->Runnable Jar file) that will place all dependencies in one jar file.

Otherwise you will need to include a classpath to the additional jars either in the manifest.mf file or on the command line with the -cp option.

java -cp .;myjar.jar;mysql.jar my.package.classname

Upvotes: 3

Cygnusx1
Cygnusx1

Reputation: 5409

You can simply add the class-path element to your jar MANIFEST and list your external jar inside the MANIFEST

like this: 

Manifest-version:1.0
Class-Path: class0.jar
class1.jar
class2.jar
class3.jar
class4.jar
...

One jar per line.

Upvotes: 0

Andrew Young
Andrew Young

Reputation: 331

You need to create a jar that includes the files from all the dependent jars. The classloader won't be able to find the classes if you simply include the jar files themselves inside the executable jar. There is an eclipse plugin called FatJar that does this.

http://fjep.sourceforge.net/

Upvotes: 0

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