Links, read them.

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Man i agree that there will be viruses written in Java.....but first understand the architecture of Nokia S40....its very closed environment...no two programs can run at a time....now you decide who is Moron

@tophe show me one example where an basic j2me or nokia s40 in particular got affected by virus

@arjun... This guy is sick...

I have a Nokia X2-01 which can run programs concurrently, a limited number though and only those that make sense. for example, running a music player and a radio at the same time doesnt make sense. Anyway, the java programs i run can access my file system, like when im uploading a picture on . With those two capabilities i think a person can manage to eat up my resources with his/her program...

Java programs can touch your files only when you give permission to them....so there is no question of virus in s40

If you're a programmer make a new java app full of viruses

From the definition of virus and the security of Java i will say it isn't possible but its possible to make other type of malicious software which you will need an AV to weed out... Like a projan horse, spyware, ect or a combination of all. Im sure a lot of us have downloaded a program even though our phones said it is not trusted.

It shows that because app isn't signed by java certificate

I know that and the fact that you are downloading an app which the developer didn't go all the way to buy a certificate puts you at risk of having malware... Anyway, WhatsApp has just stored undeletable log files on my phone as i was uploading images there, a sign that once you give permission to an app to read and/or write to your java mobile it can do something else to your files without your permission... And if you java phone supports widget like mine you are more at risk since there is aut

I can't seem to get the last part of my reply through which makes a really good point.

@profile, i haven't used s40 in a long time now but doesn't the app will ask for user permission every time it wants to do something . etc creating a file and if you pressed detail it will show you exactly the filename and location of it. I think you are reffering to the session based permission or ask once permission feature which i think is not available for read/write disk

The session based permission request is at start-up but since WhatsApp is always running in the background it asked that kind of permission once...

The last part of my comment goes: Java phones are not at risk from viruses but projan horses, and spyware. An AV can scan for a piece of code in a program which assign itself as a start-up widget and uses the multi threading feature which gives it higher privileges...

a program which can do that and not yield CPU time to other programs can render your phone useless because you will have to switch it off to stop the program but it will also start-up again as soon as you switch your phone back on...

The code to give high priority is quiet simple in C Sharp, here is it: using (Process highP = Process.GetCurrentProcess()) highP.PriorityClass = ProcessPriorityClass.High;...

And remember we are talking about a projan horse here. A program you will give you permission to write to your file to do something unharmfull but it will decide to do more at that time...

@profile... And I thought its a typos but as u mentioned more than once, let me point out its ''Trojan Horse'' not ''Projan Horse''...