【简答题】定义一个公有double型常量PI为3.14,下列正确的是:A. public double PI=3.14;B. public final static double PI=3.14;C. public final static double PI;D. public final double PI=3.14;
【单选题】分析以下代码: public class Test { public static void main(String[] args) { double radius; final double PI= 3.15169; double area = radius * radius * PI; System.out.println("Area is " + area); } }