Working as a Java Developer and working across multiple projects there is one frequent error which I have encountered is : Exception in thread "main" java.lang.NoClassDefFound Error.The reason for this error is missing class file from the CLASSPATH.
This sometimes becomes very frustrating when you have to search for missing class in a set of JAR files. For resolving this error quickly I have written a JAVA utility which searches for class file in all jar files present in a particular directory.