Can java complete this mission? If it can, how?

please, Tell me about your oppinion.
I want to make a applet which can control all opened windows [application] on windows O/S.
In other words, this applet makes the explore which downloads this applet the most top window layer.
So, When user change the active window using mouse or alt-tab, it doesn't works.
I want to use this applet in the examination system. So, when the students show the page which contains this applet, the applet is downloaded and make the PC like dummy terminal during the user see this page.
Can java do this? If it can, how i make this applet?
Umm.. thanks for your reading.

You can look at java.awt.Robot.
If that doesn't do what you need then you will have to figure out how to do it in C/.C++ and then use JNI to connect it to your applet.

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