no, applets aren't normally allowed to access anything on the client machine.
Signed applets can, IF the user allows them (which I personally wouldn't unless the signing authority was a well known one and even then only if the applet ran on a site I implicitly trust and the applet is a required part of the user experience on that site). Effectively what this boils down to is that you should not use a signed applet unless you're in an intranet environment.
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