Reference for Processing version 1.5. 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.

Name

### extends

Examples

    DrawDot dd1 = new DrawDot(50, 80);

    void setup() {
      size(200, 200);
    }

    void draw() {
      dd1.display();
    }

    class Dot {
      int xpos, ypos;
    }

    class DrawDot extends Dot {
      DrawDot(int x, int y) {
        xpos = x;
        ypos = y;
      }
      void display() {
        ellipse(xpos, ypos, 200, 200);
      }
    }

Description | Allows a new class to inherit the methods and fields (data members) from an existing class. In code, state the name of the new class, followed by the keyword extends and the name of the base class. The concept of inheritance is one of the fundamental principles of object oriented programming.
Usage | Web & Application
Related | class super

Updated on August 30, 2010 04:29:39pm EDT