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class

Keyword used to indicate the declaration of a class. A class is a composite of fields (data) and methods (functions that are a part of the class) 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 on the Oracle website.

• 
  // Declare and construct 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 draw() { 
    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 > height) { 
        ypos = 0; 
      } 
      line(0, ypos, width, ypos); 
    } 
  } 
  

• class ClassName {
• statements
• }

• ClassNameAny valid variable name
• statementsany valid statements

• Object