Can't delete java from program files.

I can't uninstall java from my laptop because it was corrupted. I followed some instructions to delete it. But i can't delete java from program files.
When i'm trying to delete dialog box shows that : "The action can't be completed because the folder or file in it is open in another program. Close the folder or file and try again".
Please help me.. I need to run my project in java. Give me the best solution within 2 days..