A simple example of setting and getting objects into an array

array_of_objects.pde

class Point {
  int year;
  int population;
  float rateOfChange;
  
  
  Point(int _year, int _population){
    year = _year;
    population = _population;
  }
}

Point[] points;

void setup() {
  size(400,400);
  points = new Point[10];
  
  println("SET 'points'");
  
  for(int i=0; i < points.length; i++) {
    int newYear = 1900 + i*5;
    int newPop = (int)random(30000);
    println(i + " " + newYear + " " + newPop);
    
    // Create a new Point instance and set its year and population
    Point newPoint = new Point(newYear, newPop);
    // Store newPoint into the points array.
    points[i] = newPoint;
  }
  
  println("GET from 'points'");
  
  for(int i = 0; i < points.length; i++) {
    // Get the ith Point from the points array and store it as 'tempPoint'
    Point tempPoint = points[i];
    // Print out attributes of tempPoint
    println(i + " " + tempPoint.year + " " + tempPoint.population);
  }
}