class Structure Web & Application


// Declare and contruct two objects (h1, h2) from the class HLine 
HLine h1 = new HLine(20, 2.0); 
HLine h2 = new HLine(50, 2.5); 
 
void setup() 
{
  size(200, 200);
  framerate(30);
}

void loop() { 
  background(204);
  h1.update(); 
  h2.update();  
} 
 
class HLine { 
  float ypos, speed; 
  HLine (float y, float s) {  
    ypos = y; 
    speed = s; 
  } 
  void update() { 
    ypos += speed; 
    if (ypos > width) { 
      ypos = 0; 
    } 
    line(0, ypos, width, ypos); 
  } 
}

Keyword used to indicate the declaration of a class. A class is a composite of data and methods (functions) which may be instantiated as objects. The first letter of a class name is usually uppercase to separate it from other kinds of variables. A related tutorial on Object-Oriented Programming is hosted from the Sun website. class ClassName { statements } ClassName Any valid variable name statements any valid statements Object 1.0 Keyword PDE