Clear OS memory buffer using Java

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http://stackoverflow.com – I am sorry in Advance as I know this question is too general but I am new to this so it is difficult for me to make this question more specific.I am working on an application in which the client has some security issues. He don't want users able to print screen or copy (ctrl+c the program's data. Now when I started to work on this I found that when these key strokes his the OS copies the data in its buffer. Now I have tried to make checks that whenever user hits the key strokes of ctrl+c or printscreen then my application suddenly flush the buffer (or cache whatever we say this). Now my questi (HowTos)