【单选题】给定如下代码: public class Circle { String name,radius; int r; public Circle(String n) { name = n; } public Circle(String n, int a) { name = n; r = a; } public Circle(String n, String d, int a) { __________...
【简答题】给定如下代码:class Circle{ String name,radius; int r; public Circle(String n) { name=n; } public Circle(String n,int a) { name=n; r=a; } public Circle(String n,String d,int a) { radius=d; }}要在第三个构造方法的...