用java编程实现求最大圆的距离源码答案

package nameyu;import java.util.Scanner;public class Test {

    /**

     * @param args

     */

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        Scanner input=new Scanner(System.in);

        System.out.print("Enter point 1(latitude and longitude) in degress ");

        String s1=input.nextLine();

        System.out.print("Enter point 2(latitude and longitude) in degress ");

        String s2=input.nextLine();

        double x1=Double.parseDouble(s1.split(",")[0]);

        //因为运行实例是用逗号隔开，所以这里也用逗号吧，这个split课本中可能漏讲了，自己补充吧

        double y1=Double.parseDouble(s1.split(",")[1]);

        double x2=Double.parseDouble(s2.split(",")[0]);

        double y2=Double.parseDouble(s2.split(",")[1]);

        final double   r=6371.01;

        double result=r*Math.acos(Math.sin(Math.toRadians(x1))*Math.sin(Math.toRadians(x2))+Math.cos(Math.toRadians(x1))*Math.cos(Math.toRadians(x2))*Math.cos(Math.toRadians(y1-y2)));

        System.out.println("The distance between the two points is "+result+"km");

    }

    }