How to make a KeyLogger in Java 

+Erbek Thanks! I usually use a dark theme myself.

+Jay Bartgis I'm glad I can help. If you need any help with that game of yours, let me know (I love making games), my email is in the description

Im unable to use getInstance() r u able to use it and which version JAR file are you using?

+1

@@pharaoh9483 yep someone please explain how to remove all this green text that keeps clogging the console - I am trying to combine this with a scanner class for inputs to the console and its a mess

I don't remember the exact code, but there's a set logging off method that you can call from inside the Singleton

Did you find the solution? Someone posted the solution in another comment

@@mryamz4909 Could you please pin that solution to the top? I also came to the comment section looking for solutions to discern mouse tracking from keyboard input.

Got the same issue here, anyone know a fix for this?

This reply is really late but I believe GlobalScreen was made abstract in an update so if you change it to GlobalScreen.addNativeKeyListener(…); it should work the same way as in the video

What package do I import?

@@warrenweissbluth1802 ^^^^

@@warrenweissbluth1802 import static java.util.logging.Level.OFF;

Thank you for the tip

where do i put these more precisely?

OS File Manager, Copy to the folder you created.

+tushar attar you could do that. This app is already a console application, but it's being ran under the JVM. You would only need to compile this java app into a native app (for the OS) then schedule a time for it to run (by the OS)

The library no longer uses the Singleton design pattern. It's just a regular old class now but with only static access. Remove the getInstance and you'll be fine.

+ahmed emam the Java char is capable of storing UTF-16 characters. If you are using a, say Russian keyboard, with the Cyrillic alphabet (и, й, я, щ... ), then the char value will be different then the English alphabet. I know that 'E' is 69 char-wise but 'й' might be 1,937 and '🤤' may be 96,291. UTF-16 supports 1,112,064 unique characters (like different alphabets or emojis). You can apply this same concept to Arabic or Chinese. So you need to figure out what char value coordinates with what symbol you need, for the key logger. Then change the program to your liking. I hard coded it with English chars because I use English 99.99% of the time. But you can code it for any language you'd like.

You could write some additional functionality. Maybe add functionality so that a combination of keys disable and enable the listener. That's just one example, many things can achieve your goal.

Call the method you want but without using getInstance(); Example: GlobalScreen.addNativeMouseWheelListener don't GlobalScreen.getInstance().addNativeMouseWheelListener

Also, I did send you the old .jar via email

Could you send me the old .jar as well?

Yes, of course, I should probably put it in the description (I didn't know people wanted to older one haha).Here is a download link to it via google drive: drive.google.com/file/d/0B1tDSRvAg_DiaVpMMHBDeWVNWXM/view?usp=sharing

Thx mate, I worked it out yesterday, everything works fine! Earned yourself a sub!

+JKresz mmm that's odd. Send me the project and I'll step through the code a bit and see if I can't debug anything.

i got the same problem, did you fix it?

+Stance BlaZe They never sent me the project, but you can; I'll see what I can do.

mryamz it fixed itself overnight as well

Im unable to use getInstance() r u able to use it and which version JAR file are you using?

I made a quick video on how to put it in a text file. Idk what to do about the mouse movement logs tho.

+Cal Mack thank you. I will be sure to include a fix for all that extraneous logging info in my final video in the spyware tutorial series.

I put the fix in for you in the description to part 5 of the spyware series.

Did u fixed it ??

Maybe u haven't saved the file with same name as of main class

What do you want to happen instead?

I want to execute only my main. By default (in the demo), Mouse and Keyboard are all enabled so console has every single information of my inputs instead of the methods you are using. This is an example of my console: Nov 30, 2018 1:36:51 AM org.jnativehook.GlobalScreen$NativeHookThread enable INFO: process_mouse_moved [459]: Mouse moved to 1252, 755. Nov 30, 2018 1:36:51 AM org.jnativehook.GlobalScreen$NativeHookThread enable INFO: process_mouse_moved [459]: Mouse moved to 1253, 755. Nov 30, 2018 1:36:51 AM org.jnativehook.GlobalScreen$NativeHookThread enable INFO: process_mouse_moved [459]: Mouse moved to 1253, 755. Nov 30, 2018 1:36:51 AM org.jnativehook.GlobalScreen$NativeHookThread enable INFO: process_mouse_moved [459]: Mouse moved to 1253, 755. Nov 30, 2018 1:36:51 AM org.jnativehook.GlobalScreen$NativeHookThread enable INFO: process_mouse_moved [459]: Mouse moved to 1253, 756. Nov 30, 2018 1:36:51 AM org.jnativehook.GlobalScreen$NativeHookThread enable INFO: process_mouse_moved [459]: Mouse moved to 1253, 756. Nov 30, 2018 1:36:51 AM org.jnativehook.GlobalScreen$NativeHookThread enable INFO: process_button_pressed [367]: Button 1 pressed 1 time(s). (1253, 756) Nov 30, 2018 1:36:51 AM org.jnativehook.GlobalScreen$NativeHookThread enable INFO: process_button_released [389]: Button 1 released 1 time(s). (1253, 756) Nov 30, 2018 1:36:51 AM org.jnativehook.GlobalScreen$NativeHookThread enable INFO: process_button_released [411]: Button 1 clicked 1 time(s). (1253, 756) Nov 30, 2018 1:36:51 AM org.jnativehook.GlobalScreen$NativeHookThread enable INFO: hook_get_multi_click_time [208]: GetDoubleClickTime: 480.

@@MyChannel-no1rr i got the same, did you fix it??

@@enriquecena2985 No, unfortunately. I tried a couple of days but I couldn't find a solution.

@@MyChannel-no1rr did you find any solutions ? Lol , i'm running on the same problem

+nigggooo I can help. I suspect it has something to do with flushing the data to the file, a falsified appending- parameter. Send me your project, SRC, via my email in the description.

Here's a good explanation about the callback stackoverflow.com/questions/7071757/keylistener-keypressed-versus-keytyped

+Rivijski I'm not sure what that runtime exception means exactly. Send me your source files through an email and I'll figure the problem out.

+Tozé Ficticio If you have everything that is in the video, simply adding the following (like the first line of the main method) will change System.out.println() to be printed to a file. try { System.setOut(new PrintStream(new File("output-file.txt"))); } catch (Exception e) { e.printStackTrace(); }

and for example, i have that code in a class runnable like: public void run() { try { Config conf = new Config(); System.setOut(new PrintStream(new File("keylog/output-file.txt"))); GlobalScreen.registerNativeHook(); GlobalScreen.getInstance().addNativeKeyListener(new Keylog(conf)); } catch (FileNotFoundException | NativeHookException e) { // TODO Auto-generated catch block e.printStackTrace(); } if(Keylog.interrupted()){ pararKeylog(); } } but to make stop this, i have to do this public void run() { while(running){ try { Config conf = new Config(); System.setOut(new PrintStream(new File("keylog/output-file.txt"))); GlobalScreen.registerNativeHook(); GlobalScreen.getInstance().addNativeKeyListener(new Keylog(conf)); } catch (FileNotFoundException | NativeHookException e) { // TODO Auto-generated catch block e.printStackTrace(); } if(Keylog.interrupted()){ pararKeylog(); } } } but when I put running to false the txt file, have very bugs.. how can I stop the thread, but the txt file don't have the bugs?

In Java the annotations are optional. You don't really need them. I tend to rarely use them when working with Java, especially because IDEs do such a good job at providing warnings. I don't know what they have to do with auto repeat, and I don't know what Auto repeat is.

Check the syntax you used to run the class thats usually the problem or check if you had renamed your file to something else other than the classname you have given

I'd bet Tom is right. Probably an invalid main method signature

@@mryamz4909 I too am facing the same issue and double checked the main method signature but the error could not be resolved.Any fixes?

Go back to configuring the class path and move the jnativehook to the class path instead of the module path. Hope that helps!

I'm glad you could find something useful about it. Did you like anything in particular?

@@mryamz4909 The simplicity of this method Now I'm already making it more readable in cases of [enter], [space], [backspace], [control], etc Thank you vm!

Good work? How are you making in more readable? There's certainly a lot of possible improvement to make for this codebase.

@@mryamz4909 Send me a message in facebook pleas at דניאל מנץ, I'm no fake, its just my name in hebrew, we could talk better on messenger, if you dont mind

+lucas cavalcanti Did you make sure JNativeHook.jar (It can be found it the description) was part of the java build path?

yep,would it help if I sent you a print of it?

+lucas cavalcanti ya sure, shoot me an email of the project as a .zip

+Kshitij Kala Option 1) yourstring.toLowerCase() Option 2) Almost all the keys have two possible return values. They will do different returns if shifted. You need to create a way to determine whether the key is shifted. A quick fix is just to have a Boolean field variable (that is true when the shift key is pressed) and print the desired key with respect to the shift key.

mryamz ....ok i will try it....

mryamz thank you.. your code is working fine... i didn't notice it earlier....

+Juan Aguirre ya sure. I'll make you a sample program that does just that. What is your email?

its whizzbang103@gmail.com. thank you , I really appreciate your help

+Juan Aguirre I sent you the email :)

Thank you so much ! keep up the good work

I also have problem saving data in a output file, can you help me with that please? This is my email : hipergrowl@hotmail.com I really appreciate your help :D

+Jackie Low haha sure I'll help. Let's build it together. I've made some spyware that does almost all what you'd like, except it sends the keystrokes to NY phone and requires me to run my laptop as a server. Are you familiar with the GitHub? We could start building the spyware asap if you do

Oh man, please don't think less of me by asking this but what you mean by "NY phone" (is it another way of saying any phone?) As for GitHub, my friend at college told me about it (I know I should've done more research on it smh)... he said it's a website that allows coders to share their files with other.

+Jackie Low oh my bad, NY phone is a typo for saying my phone. I don't think anything less of you. I'm absolutely sure that there's plenty I don't know about programming. How do you propose we build this spyware?

Well thats pretty cool, I'm assuming you have a open source phone then--- so android? That's actually cooler than the email in a way. Ummm so I've taken a course in C++ and I know a little about Java. They sadly didn't teach us anything near this lmfao so i doubt "hello world" would apply here. Im assuming its not easy; based off the lack of keyloggers out there for mac compare to windows.

+Jackie Low Yes I have an Android. No it's not open source. I just used their open source sdk to write native apps for my phone. Writing this keylogger in java should be very simple to distribue to any platform since any java application is ran on a virtual machine. If you have java on her computer like everyone else does it can be ran. If you know object oriented programming with c++ then java would be fairly easy to pick up.

Nvm I missed the download file in the description but for some reason the code still doesn't run even tho there are no syntax errors

Make sure that the library has been added to the projects build path.

+Meghasai reddy Bodimani Did you purely follow my tutorial or did you add to it? A native mouse listener wasn't part of this tutorial. Maybe you are implementing the wrong interface.

I got it i downlaoded the jnativehook 1.1.5 which also tracked the movement of the mouse.. Thank you..btw your tutorials are awesome

Thanks!

+【 Doim 】 what address shall receive it?

mryamz my email: domidol@web.de Thank you very much!

It's literally only like... ten lines.... lol

Im unable to use getInstance() r u able to use it and which version JAR file are you using?

try this one. github.com/kwhat/jnativehook/releases/download/2.1.0/jnativehook-2.1.0.zip

+Vivek Bhatt Here is how one filters the console output: github.com/kwhat/jnativehook/wiki/ConsoleOutput

thank you so much but I have one more question. how we stop the program on the combination of some keys like Ctrl+Alt+x?

+Vivek Bhatt I would create an array of booleans (eg Boolean[] keysPressed = new bool[MaxKeyCodeSize]) where the index of the array coordinates to whether the key is pressed. This way you could check during the end of every key pressed call, if( keysPressed[Native Key Code. X] && keysPressed[Native Key Code. Alt]... ), then system.exit(0)

+Stenlan It logs everything, passwords, word docs, IDEs, you name it

Why are you trying to create a program that logs passwords?

Im unable to use getInstance() r u able to use it and which version JAR file are you using?

I have done it and yes it log password too, even mouse coordinates

When i use 1.1.xxxx version i dnt see that error, but all mouse moments on the consolei dnt want them :)

+Addala Shivateja the statically accessed getInsurance() method is only needed depending on the version of the library you use. I think, for the more recent versions of the library, you don't need it. Remove it and and then call the static method you want.

Yes, 6 years and still an issue.

+MinecraftPlayer420 yes, but you'd have to build up this software a little further for something like that. I've made a tutorial series for how to do so.

Ok, do you know any good ip resolver?

+MinecraftPlayer420 which kind? Would one that performs a DNS look up be sufficient?

Yes

+MinecraftPlayer420 you can actually do this with JavaSE's default api.

The library we are using uses Java's Native Interface (JNI) and executes the native calls for us depending on our operating system (os). We don't write anything special here. Simply, the users (that's us) of the library simply need to know how to implement an abstract type. We don't even care on whether or not it's an interface or abstract class. This library is open source, so if you want a more technical understanding then try reading the code to the library we use.

@@mryamz4909 ok that makes sense... I personally do understand it at all and I also worked with this library already, I just talked about some newer coders that may not understand it, but you seem to be right, there is not much more to understand than know how to implement it.

+Jonas Grønbek I'm sorry to here that, but this jar is totally harmless. Decompile and see for yourself. Heck, the .JAR is even open source.

Its not the jar, you should check where have you downloaded it from.

Mail: fn.k1ndd@gmail.com

+TUGS OFFICAL yeah I'll get you it asap

+TUGS OFFICAL sent it

okey thank you bro :))

+TUGS OFFICAL no problem.

No, but if you don't have get instance then you probably have a different version of the library. It means all the methods that were formerly accessable only via get instance can now be accessible statically as public static void methods. Remove .getInstance() from the method call you want and everything should work

Кстати, ты русский?

@@mryamz4909 Same problem, thanks!

+MRIDUL GUPTA all you have to do is adjust the log output. Here's how to do so: github.com/kwhat/jnativehook/wiki/ConsoleOutput

+Milos Aksic Are you wanting a tutorial on spyware where the file is run and setup remotely without her knowing?

Yes, so I can know is she texting to someone else becouse she is spending most time on PC, I want to sent her file like a picture or something and that should be keylogger and after that I will receive messages on my email, can you make tutorial how to create that and send?

+Milos Aksic Honestly I've never deployed spyware remotely and invaded someone's privacy. It sounds like a fun challenge, if I can figure it out, when I have the time, I'll make a tutorial on it.

Nice I hope you will make it, I had the problems with someone spying me so I had to reinstall my windows.