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samuele.mattiuzzo

Member

From: Treviso, IT

Registered: 2009-10-12

Posts: 307

Website

Lock the screen with java

I'd like to know if it's possible to create a java application that locks screen and can be unlocked only with username or password. Alt-f4, ctrl-alt-canc or windows key shouldn't be able to kill it

Don't need the code, just need to know where i can read some guides or what part of java rfc should i find something useful

thanks!!

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Peasantoid

Member

Registered: 2009-04-26

Posts: 928

Website

Re: Lock the screen with java

I know jack squat about Java, but you could probably call vlock or some such.
(Ohh... Windows. Never mind.)

Last edited by Peasantoid (2010-02-17 02:58:48)

scottman

Member

From: Utah

Registered: 2010-02-12

Posts: 27

Website

Re: Lock the screen with java

I dont think you can in Java since its a higher level language.
http://www.coderanch.com/t/328389/Java- … oard-input <--this is for windows saying you can not.

there may be a way via the JNI in java.
http://en.wikipedia.org/wiki/Java_Native_Interface
it really depends how much work you want to go through to do this, you can probably find one that does this already. But using JNI with some c/c++ to catch those keys before they get sent to the system should work.

good luck

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robrene

Member

Registered: 2009-04-16

Posts: 168

Re: Lock the screen with java

I don't think it's possible directly from Java, seeing the code will run on its own virtual machine. Your best chance would be to run a different (nonjava) program from within your own program using java.lang.Runtime.exec(). See here for an example.

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