The Jar Class Finder is a must have eclipse plug-in for all the WebSphere developer. Every now and then we run into NoClassDefFound error, the JAR class finder utility helps in those scenarios in finding the class.
First download and install the JAR class finder eclipse plug-in in your IDE by following the instructions on the download page.
Once it is installed icon of eye will appear in your Eclipse IDE toolbar, click on that icon to get Jar Class finder dialog box. Enter name of the class and the classpath where you want to find it like this
Click on Find it will take few minutes to find the JAR file that contains the class that your looking for and list out all the .jar files that contain the class like this