connect friend class

public class PersonDemo 
{
    public static void main(String[] args)
    {
        Person sara = new Person("Sara", "sara.jpg", 10, 200);
        Person chenghan = new Person("Cheng-Han", "cheng-han.png", 300, 0);
        Person cay = new Person("Cay", "cay.gif", 250, 180);
    }
}

// Bluej project: lesson3/friends4
public class Person
{
    private String name;
    private String friends;
    private int x;
    private int y;
    

    public Person (String aName, String pictureName, int xCoord, int yCoord)
    {
        name = aName;
        friends = "";
        x = xCoord;
        y = yCoord;
        Picture picture = new Picture(pictureName);
        picture.translate(xCoord, yCoord);
        picture.draw();
    }
    
    public void addFriend(Person friend) 
    {
        friends = friends + friend.name + " ";
        SmallCircle circle = new SmallCircle(x, y);
        circle.fill();
        Line line = new Line(x, y, friend.x, friend.y);
        line.draw();
    }
    
    public void unfriend(Person nonFriend)
    {
        friends = friends.replace(nonFriend.name + " ", "");
    }
    
    public String getFriends() 
    {
        return friends;
    }
}

The this Reference

public double drive(double distance)
{
  this.mimlesDriven = this.milesDriven + distance
}

public Person (String name, String pictureName, int x, int y)
{
    this.name = name;
    this.friends = "";
    this.x = x;
    this.y = y;
    Picture picture = new Picture(pictureName);
    picture.translate(x, y);
    picture.draw();
}