It is very much important and most common for many java Developer to search for the required class file in the numurous jars/ ears / wars in the big project code base. So it is very much useful to have a handy tool like JarScan in work place. It is very simple and light weight tool which will help in searching the required class files in the big project code.
JarScan.jar file can be downloaded from below link.
http://www.softpedia.com/get/System/File-Management/JarScan.shtml

JarScan helps when you are having problems finding a class that you need in order to compile your project. It will locate the class files in no time at all.
Requirements:
· Java 1.4 or above
Download
1. To search class xyz

java -jar e:\jarscan.jar -class xyz

2.To display the help message type: 

java -jar jarscan.jar -help OR java -jar jarscan.jar

Hope this this helps my java mate ! :)