class DataNode{                    // creates a class named DataNode  
  String carName;                  // creates a property that holds a string with the name of the car
  int date;                     // creates a property that holds a string with the date of the gas fillup
  float gasPrice;                  // creates a property that holds the price / gallon of the gas
  float mileage;                   // creates a property that holds the miles / gallon for that fillup


  DataNode(String dCarName, int dDate, float dGasPrice, float dMileage) { // defines the method used to create a DataNode object...

    carName = dCarName;     
    date = dDate;           
    gasPrice = dGasPrice;                 
    mileage = dMileage;                 
  }

/*  
  void display() {
    fill(circleColor);    // set the fill color to be whatever is store in this object's circleColor property
    pushMatrix();
    translate(x,y,z);
    sphere(circleSize);
    popMatrix();
    //ellipse(x,y, circleSize, circleSize);    // draw the circle using the x,y and circleSize properties of this object
  }
 */
}