public class Point3D {
	//Just for our example, we are going to keep track of how many get made.
	private static long count = 0;
	
	
	//Each Point3D object will have an immutable x and y and z value.
	private final float x,y,z;
	
	
	//We'll have just one constructor option.
	public Point3D(float xIn, float yIn, float zIn) {
		x = xIn;
		y = yIn;
		z = zIn;
		
		count++;
	}
	
	
    //So-called "destructor" but not like in other languages.  We won't 
	//   talk much about these since they are "unreliable" in Java...
    protected void finalize() throws Throwable
    {
      //NOTE: This is only called if/when garbage collection takes place
      //      to clean up no longer used memory.
      count--;
      super.finalize(); //We'll talk more about this line later...
    } 


    
	
	//We'll have getters for each axis.
	public float getX() {
		return x;
	}

	public float getY() {
		return y;
	}

	
	public float getZ() {
		return z;
	}
	
	
	//We'll have a getter for the overall count of objects created.
	public static long getCount() {
		return count;
	}
	
	
	//We'll have one example of a utility method.
	public Point3D translate(float xOffset, float yOffset, float zOffset) {
		return new Point3D(x+xOffset, y+yOffset, z+zOffset);
	}
	
	
	//We'll have the "usual suspects" a class should have.
	@Override
	public String toString() {
		return "x:"+x+" y:"+y+" z:"+z;
	}
	
	@Override
	public boolean equals (Object other) {
		if (other == null) {
			return false;
		}
		else if (this.getClass()!=other.getClass()) {
			return false;
		}
		else {
			Point3D casted = (Point3D)other;
			return (x==casted.x && y==casted.y && z==casted.z);
		}
	}

	
}



//Copyright 2016 Evan Golub