public class Point {
    private int x;                    // fields
    private int y;
    
    public Point() {
        this(0, 0);
    }

    public Point(int x, int y) {      // constructor
        this.x = x;
        this.y = y;
    }
    
    public double distance(Point p) {
        int dx = x - p.x;
        int dy = y - p.y;
        return Math.sqrt(dx*dx + dy*dy);
    }
    
    // Returns true if o refers to a Point object with the same x/y
    // coordinates as this Point;  otherwise returns false.
    public boolean equals(Object o) {
        if (o != null && getClass() == o.getClass()) {
            Point p = (Point) o;
            return p != null && x == p.x && y == p.y;
        } else {
            return false;
        }
    }

    public int getX() { return x; }   // accessor
    public int getY() { return y; }

    public void translate(int dx, int dy) {
        x += dx;
        y += dy;                      // mutator
    }

    public String toString() {        // for printing
        return "(" + x + ", " + y + ")";
    }
}