java中point是什么意思

public class Point {
 
    private int x;
    private int y;
 
    public Point(int x, int y) {
        this.x = x;
        this.y = y;
    }
 
    public int getX() {
        return x;
    }
 
    public void setX(int x) {
        this.x = x;
    }
 
    public int getY() {
        return y;
    }
 
    public void setY(int y) {
        this.y = y;
    }
     
    public double distance(Point p1,Point p2){
        return Math.sqrt((p2.getX()-p2.getX())*(p2.getX()-p2.getX())+(p2.getY()-p1.getY())*(p2.getY()-p1.getY()));
    }
     
    public static void main(String args[]){
        Point p1 = new Point(14,17);
        Point p2 = new Point(23,90);
        double s = p1.distance(p1,p2);
        System.out.println("2点之间的距离为："+s);
    }
}