Main Problem

I'm trying to create a widely applicable keypress simulation program, but I don't know how to use Java so I can only search for Q&As on the site, which is inefficient. So I want to open a new post and deal with these problems all in once:

I need the following functionality:

  1. Press arbitrary keys (using key codes shown here) for example, some code like press[65] should press A.

  2. Press arbitrary mouse keys (including mouse down, mouse up and mouse click)

  3. Move mouse to a specific location

  4. rotate the scrolling of the mouse

  5. Screen shot

How to do these small functionalities? Thanks!

Some work I've done

One can use these as a reference:

JLink part:


robotclass = JavaNew["java.awt.Robot"];

move[{x_, y_}] := robotclass@mouseMove[x, y];
mouseleftdown[] := robotclass@mousePress[InputEvent`BUTTON1UMASK];
mouseleftup[] := robotclass@mouseRelease[InputEvent`BUTTON1UMASK];
mouseleftclick[] := CompoundExpression[mouseleftdown[], mouseleftup[]];
mouseleftdoubleclick[] := Do[mouseleftclick[], 2];

Mathematica Part:



move cursor

left mouse clicks

key press

screen shots

  • $\begingroup$ related: search?q=robotClass and search?q=screenshot $\endgroup$
    – Kuba
    Commented Aug 25, 2016 at 14:17
  • $\begingroup$ What, that can't be found above, is missing? $\endgroup$
    – Kuba
    Commented Aug 25, 2016 at 14:18
  • $\begingroup$ What's missing? $\endgroup$
    – Wjx
    Commented Aug 25, 2016 at 14:21
  • $\begingroup$ What answers have you failed to find? $\endgroup$
    – Kuba
    Commented Aug 25, 2016 at 14:25
  • $\begingroup$ rotate scrolling and press arbitrary mouse keys (except left mouse button). but just willing to merge them together so that further readers can get a full image of how to manipulate such things with this post. $\endgroup$
    – Wjx
    Commented Aug 25, 2016 at 14:27

1 Answer 1


A summary to all the stuffs:


robotclass = JavaNew["java.awt.Robot"];

mousemove[{x_, y_}] := robotclass@mouseMove[x, y];

leftmousedown[] := robotclass@mousePress[InputEvent`BUTTON1UMASK];
leftmouseup[] := robotclass@mouseRelease[InputEvent`BUTTON1UMASK];
rightmousedown[] := robotclass@mousePress[InputEvent`BUTTON3UMASK];
rightmouseup[] := robotclass@mouseRelease[InputEvent`BUTTON3UMASK];
midmousedown[] := robotclass@mousePress[InputEvent`BUTTON2UMASK];
midmouseup[] := robotclass@mouseRelease[InputEvent`BUTTON2UMASK];
leftmouseclick[t_: 1] := 
  Do[CompoundExpression[leftmousedown[], leftmouseup[]], t];
rightmouseclick[] := 
  CompoundExpression[rightmousedown[], rightmouseup[]];
midmouseclick[] := CompoundExpression[midmousedown[], midmouseup[]];

scroll[x_] := robotclass@mouseWheel@x;

keypress = (Function[k, 
      robotclass[keyPress[Symbol["KeyEvent`VKU" <> k]]]] /@ {##};
      robotclass[keyRelease[Symbol["KeyEvent`VKU" <> k]]]] /@ {##}) &;

getpixelcolor[{x_, y_}] := 
  StringCases[robotclass@getPixelColor[x, y]@toString[], 
   "=" ~~ d : DigitCharacter .. :> ToExpression@d];

screeninfo = 
  "FullScreenArea" /. 
   Flatten@SystemInformation["Devices", "ScreenInformation"];
screenshot[range : {{x0_, x1_}, {y0_, y1_}} : screeninfo] := 

The name of those functions already explains everything, so no need for extra explanations~ This piece of code has already include all the key features in 按键精灵, a keypress or mouse move simulator used to automate repetitive works, e.g. play HearthStone. But with the ability of Mathematica, I think this piece of code can do much more! :)

  • 1
    $\begingroup$ how do I get keypress to emulate "f" $\endgroup$ Commented Jul 22, 2017 at 11:58

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