Reference for Processing version 1.2. If you have a previous version, use the reference included with your software. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Javadoc.



// Run this program to learn how each of these functions
// relate to the others 

void draw() { } // Empty draw() needed to keep the program running

void keyPressed() {
  println("pressed " + int(key) + " " + keyCode);

void keyTyped() {
  println("typed " + int(key) + " " + keyCode);

void keyReleased() {
  println("released " + int(key) + " " + keyCode);
Description The keyTyped() function is called once every time a key is pressed, but action keys such as Ctrl, Shift, and Alt are ignored. Because of how operating systems handle key repeats, holding down a key will cause multiple calls to keyTyped(), the rate is set by the operating system and how each computer is configured.
void keyTyped() { 
Returns None
Usage Web & Application
Related keyPressed
Updated on June 14, 2010 12:05:29pm EDT

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