5.股票风险

2019-11-06 06:15:30

字体：大中小

来源：转载

供稿：网友

package s5;import java.util.ArrayList;import java.util.List;class MyPoint{ PRivate double x; // 横坐标 private double y; // 纵坐标 public MyPoint(double x, double y) { this.x = x; this.y = y; } public static double distance(MyPoint p1, MyPoint p2) { double dx = p1.x - p2.x; double dy = p1.y - p2.y; return Math.sqrt(dx*dx + dy*dy); } public static double getMinDistance(List<MyPoint> lst) { double r = Double.MAX_VALUE;//MyPoint.distance(lst.get(0),lst.get(lst.size())); /*Double.MAX_VALUE double类型能取到的最大值*/ int n = lst.size(); for(int i=0; i<n; i++) { for(int j=i+1; j<n; j++) { MyPoint p1 = lst.get(i); MyPoint p2 = lst.get(j); double d = MyPoint.distance(p1,p2); if( d < r ) r=d; } } return r; } public static void main(String[] args){ List<MyPoint> lis = new ArrayList<MyPoint>(); lis.add(new MyPoint(1,2)); lis.add(new MyPoint(1,2)); lis.add(new MyPoint(2,5)); lis.add(new MyPoint(3,9)); System.out.println(getMinDistance(lis)); } }

上一篇：设计模式(2)之单例模式

下一篇：不要4