java两点画线 java两点之间距离公式

//两点间距离公式
package watch;
 import java.util.Scanner;
 public class Point {
 private float x;
 private float y;
 private float d;
 Point (){}//构造空的构造函数
 Point (float x1,float y1 ){x=x1;y=y1;}
 public float Distance(Point p1,Point p2){//两点间距离
 float a;
 a=((p1.x-p2.x)(p1.x-p2.x))+((p1.y-p2.y)(p1.y-p2.y));
 d=(float)Math.sqrt(a);
 return d; 
 }public static void main(String[] args) {
 float x,y,d;
 Scanner Wrt=new Scanner(System.in);
 x=Wrt.nextFloat();
 y=Wrt.nextFloat();
 Point p=new Point(x,y);
 x=Wrt.nextInt();
 y=Wrt.nextInt();
 Point p1=new Point(x,y);
 Point p2=new Point();
 d=p2.Distance(p, p1);
 System.out.print(“两点间距离为”+" "+d);}
}