Alexander

public class Point
{
    /** Decleration of variables */
    private int Id = 0; // the unique id for the instance of the class
    static int counter = 0; // the counter of how many classes made
    static List classList = new List(); // creates new list to store all the class instances
    private double coord_x, coord_y;

    /**
    Description: This constructor will run when new instance of this class is
                 created and no values for x and u are specified
    */
    public Point()
    {
        this(0.0,0.0);
    }


    /**
    Description: This constructor will run when new instance of this class is
                 created and gets specified values for x and y
    @param x (double), the value of x coordinate
    @param y (double), the value of y coordinate
    */
    public Point(double x, double y)
    {
        this.coord_x = x;
        this.coord_y = y;
        classList.set(this.Id,this); // this is what i am trying to get to work
        this.Id = this.counter++;
    }
}

// i am trying to keep track of all classes so i can have a method within this class that will print all my x, y and the Id of the class
// My idea was to add the refrence of the class to a list and then use for loop to print them all out.

//Error
Point.java:47: cannot find symbol
symbol  : variable This
location: class Point
        classList.set(this.Id,This);
                              ^
1 error