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.



BufferedReader reader;
String line;
void setup() {
  // Open the file from the createWriter() example
  reader = createReader("positions.txt");    
void draw() {
  try {
    line = reader.readLine();
  } catch (IOException e) {
    line = null;
  if (line == null) {
    // Stop reading because of an error or file is empty
  } else {
    String[] pieces = split(line, TAB);
    int x = int(pieces[0]);
    int y = int(pieces[1]);
    point(x, y);
Description A BufferedReader object is used to read files line-by-line as individual String objects.

Starting with Processing release 0134, all files loaded and saved by the Processing API use UTF-8 encoding. In previous releases, the default encoding for your platform was used, which causes problems when files are moved to other platforms.
readLine() returns a String that is the current line in the text file
Usage Web & Application
Related createReader()
Updated on June 14, 2010 12:05:29pm EDT

Creative Commons License