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单选题
现有:     class Pencil  {  public void write (String content){     System.out.println ("Write"+content);     }     }  class RubberPencil extends Pencil{     public void erase (String content){     System.out.println ("Erase"+content);     }     }  执行下列代码的结果是哪项?()      Pencil pen=new RubberPencil();      pen.write ("Hello");      pen.erase ("Hello");
A

 Write Hello        Erase Hello

B

 Erase Hello        Write Hello

C

编译错误

D

运行时抛出异常


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考题 单选题现有: class TestApp{ public static void main (String[] args){ for (int i=0; i A 0123B 012456789C 0123456789D 012