Problems executing my jar file

i wanted to ask how do you jar a file and make it executable at the same
time
i did something like this
jar cfm main.jar Manifest.txt House.class mainInteractiveMap.class
house.jpg car.jpg map1.txt
and in the manifest file i have soemthing like this
Main-Class: MainInteractiveMap
but when i try to run it like this
java -jar main.jar
it gives me an error like this
exception in thread main java,lang.NoClassDefFoundError:
MainInteractiveMap
but the main is in MainInteractiveMap
regards

1. Does your application run when do not jar it? If it does run, what command do you use? If it doesn't run, get it to run before you try to jar it.
2. Does your application run using
java -cp main.jar MainInteractiveMapIf it doesn't run, you have not jared the MainInteractiveMap correctly. If it does run, then you have a problem in the manifest. For example, there should be a blank line at the end of the Manifest.txt line.

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