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Java/Processing/processing-3.3.6/modes/java/reference/key.html
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Java/Processing/processing-3.3.6/modes/java/reference/key.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
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<head>
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<title>key \ Language (API) \ Processing 2+</title>
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<link rel="icon" href="/favicon.ico" type="image/x-icon" />
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="Author" content="Processing Foundation" />
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<meta name="Publisher" content="Processing Foundation" />
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<meta name="Keywords" content="Processing, Sketchbook, Programming, Coding, Code, Art, Design" />
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<meta name="Description" content="Processing is a flexible software sketchbook and a language for learning how to code within the context of the visual arts. Since 2001, Processing has promoted software literacy within the visual arts and visual literacy within technology." />
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<meta name="Copyright" content="All contents copyright the Processing Foundation, Ben Fry, Casey Reas, and the MIT Media Laboratory" />
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<script src="javascript/modernizr-2.6.2.touch.js" type="text/javascript"></script>
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<link href="css/style.css" rel="stylesheet" type="text/css" />
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</head>
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<body id="Langauge-en" onload="" >
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<!-- ==================================== HEADER ============================ -->
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<div id="ribbon">
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<ul class="left">
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<li class="highlight"><a href="http://processing.org/">Processing</a></li>
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<li><a href="http://p5js.org/">p5.js</a></li>
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<li><a href="http://py.processing.org/">Processing.py</a></li>
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<li><a href="http://android.processing.org/">Processing for Android</a></li>
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</ul>
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<ul class="right">
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<li><a href="https://processingfoundation.org/">Processing Foundation</a></li>
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</ul>
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<div class="clear"></div>
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</div>
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<div id="header">
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<a href="/" title="Back to the Processing cover."><div class="processing-logo no-cover" alt="Processing cover"></div></a>
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<form name="search" method="get" action="//www.google.com/search">
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<p><input type="hidden" name="as_sitesearch" value="processing.org" />
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<input type="text" name="as_q" value="" size="20" class="text" />
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<input type="submit" value=" " /></p>
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</form>
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</div>
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<a id="TOP" name="TOP"></a>
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<div id="navigation">
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<div class="navBar" id="mainnav">
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<a href="index.html" class='active'>Language</a><br>
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<a href="libraries/index.html" >Libraries</a><br>
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<a href="tools/index.html">Tools</a><br>
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<a href="environment/index.html">Environment</a><br>
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</div>
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<script> document.querySelectorAll(".processing-logo")[0].className = "processing-logo"; </script>
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</div>
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<!-- ==================================== CONTENT - Headers ============================ -->
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<div class="content">
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<p class="ref-notice">This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, <a href="https://github.com/processing/processing-docs/issues?state=open">please let us know</a>. If you prefer a more technical reference, visit the <a href="http://processing.github.io/processing-javadocs/core/">Processing Core Javadoc</a> and <a href="http://processing.github.io/processing-javadocs/libraries/">Libraries Javadoc</a>.</p>
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<table cellpadding="0" cellspacing="0" border="0" class="ref-item">
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<tr class="name-row">
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<th scope="row">Name</th>
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<td><h3>key</h3></td>
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</tr>
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<tr class="">
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<tr class=""><th scope="row">Examples</th><td><div class="example"><pre >
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// Click on the window to give it focus,
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// and press the 'B' key.
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void draw() {
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if (keyPressed) {
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if (key == 'b' || key == 'B') {
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fill(0);
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}
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} else {
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fill(255);
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}
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rect(25, 25, 50, 50);
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}
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</pre></div>
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</td></tr>
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<tr class="">
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<th scope="row">Description</th>
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<td>
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The system variable <b>key</b> always contains the value of the most recent key on the keyboard that was used (either pressed or released).
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<br /> <br />
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For non-ASCII keys, use the <b>keyCode</b> variable. The keys included in the ASCII specification (BACKSPACE, TAB, ENTER, RETURN, ESC, and DELETE) do not require checking to see if they key is coded, and you should simply use the <b>key</b> variable instead of <b>keyCode</b> If you're making cross-platform projects, note that the ENTER key is commonly used on PCs and Unix and the RETURN key is used instead on Macintosh. Check for both ENTER and RETURN to make sure your program will work for all platforms.
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<br /><br />
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There are issues with how <b>keyCode</b> behaves across different renderers and operating systems. Watch out for unexpected behavior as you switch renderers and operating systems.
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</td>
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</tr>
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<tr class=""><th scope="row">Related</th><td><a class="code" href="keyCode.html">keyCode</a><br />
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<a class="code" href="keyPressed.html">keyPressed</a><br />
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<a class="code" href="keyPressed_.html">keyPressed()</a><br />
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<a class="code" href="keyReleased_.html">keyReleased()</a><br /></td></tr>
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</table>
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Updated on April 30, 2017 02:33:19pm EDT<br /><br />
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<!-- Creative Commons License -->
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<div class="license">
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<a rel="license" href="//creativecommons.org/licenses/by-nc-sa/4.0/"><img alt="Creative Commons License" style="border: none" src="https://licensebuttons.net/l/by-nc-sa/4.0/88x31.png" /></a>
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</div>
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<xapRights:UsageTerms>
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<rdf:Alt>
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<rdf:li xml:lang='x-default' >This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/">Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License</a>.</rdf:li>
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<rdf:li xml:lang='en' >This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/">Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License</a>.</rdf:li>
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<rdf:Description rdf:about=''
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<cc:license rdf:resource='http://creativecommons.org/licenses/by-nc-sa/4.0/'/>
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<?xpacket end='r'?>
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-->
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</div>
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<!-- ==================================== FOOTER ============================ -->
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<div id="footer">
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<div id="copyright">Processing is an open project intiated by <a href="http://benfry.com/">Ben Fry</a> and <a href="http://reas.com">Casey Reas</a>. It is developed by a <a href="http://processing.org/about/people/">team of volunteers</a>.</div>
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<div id="colophon">
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<a href="copyright.html">© Info</a>
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</div>
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</div>
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