java 类和方法引用

public class Point {

    int x=0;
    int y =0;

    Point() {
        System.out.println(" I'm Point()");

    }

    Point(int x, int y) {
        this.x = x;
        this.y = y;
        System.out.println("I'm Point(int x,inty)");

    }


    /**
     * 显示当前点的坐标
     * @param args
     */
    int displayMyCoordinate(){
        System.out.println("当前点的坐标是：" + this.x  + ","+ this.y);
        return 1;

    }

    /**
     * 获得某两点之间的中点。
     * @param args
     */
    Point midpoint(Point A,Point B){
        int x = (A.x + B.x)/2;
        int y = (A.y + B.y)/2;
        Point p = new Point(x,y);
        return p;
    }



    public static void main(String[] args) {
        Point p = new Point();
        Point p2 = new Point(2, 2);
        System.out.println(p2.displayMyCoordinate());
        System.out.println(p2.x);

    }

}