此小程序用于输入两个坐标，输出他们之间的距离

/*
 * 此小程序用于输入两个坐标，输出他们之间的距离
 * 2009年5月5日20:30:31
 * author： Alpha
 */
public class Point
{
 double x;
 double y; Point()
 {
 } Point(double x, double y)
 {
  this.x = x;
  this.y = y;
 } 
 public static int getDistence(Point p1, Point p2)
 {
  double x1,y1;
  x1 = p2.x-p1.x;
  y1 = p2.y-p2.y;
  return (int) Math.sqrt(x1*x1+y1*y1);  
 } public static void main(String[] args)
 {
  Point p = new Point();
  Point p1 = new Point(20, 30);
  Point p2 = new Point(40, 60);
  System.out.println("p1到p2之间的距离是："+lang);  
 }
}