圆面积异常

package zengliang;

import java.util.*;

public class Suv {

    public static void main(String[] args) {
        // TODO 自动生成的方法存根
        try{
            double r,s;
            final double PI = 3.14;
            Scanner sc=new Scanner(System.in);
            System.out.println("输入圆的半径：");
            r = sc.nextDouble();
            s = PI*r*r;
            System.out.println("面积为："+s);

        }catch(Exception e){
             System.out.println("半径不能为字符！");
        }finally{
             System.out.println("运行结束");
        }
        
    }

}