// This class defines a blueprint for Point1 objects.
// A new Point3 object can be created by calling:
//   Point1 p = new Point3();
// Point3 objects have two integer fields, x and y.
// They can be accessed by using:
//   p.x
//   p.y
// Point3 objects can also translate their values
// you can do this by calling the translate method:
//   p.translate(4, 7);
public class Point3 {
   //fields: data / information
   
   // Since these do not have the word "static"
   // it means they are part of the blueprint.
   // Every Point1 object will have an x and a y
   // value. The will be by default set to 0.
   int x;
   int y;
   
   //instance methods: behavoir / actions
   
   // Since this method does not have the word "static"
   // it means that it is part of the blueprint and
   // each Point3 that is made has a .translate() method.
   public void translate(int dx, int dy) {
      // This method gets called on some particular Point3 
      // object. Within the method, "this" refers to the 
      // specific Point3 object that the .translate() method 
      // was called on.
      this.x += dx;
      this.y += dy;
   }
}