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以下代码运行结果是 class Exsuper{ String name; Str...
以下代码运行结果是 class Exsuper{ String name; String nick_name; public Exsuper(String s,String t){ name = s; nick_name = t; } public String toString(){ return name; } } public class Example extends Exsuper { public Example(String s,String t){ super(s,t); } public String toString(){ return name+" a.k.a "+nick_name; } public static void main(String[] args) { Exsuper a = new Exsuper("First","1"); Example b = new Example("Second","2"); System.out.println("a is "+a.toString()); System.out.println("b is "+b.toString()); } }
A、编译错误
B、ClassCastException异常
C、输出 a is First b is Second
D、输出 a is First a.k.a 1 b is Second a.k.a 2
E、输出 a is First b is Second a.k.a 2
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