現(xiàn)有：     
class Pencil  { 
public void write （String content）{ 
System.out.println （"Write"+content）；     }     } 
class RubberPencil extends Pencil{     public void write （String content）{ 
System.out.println （"Rubber Write"+content）；     } 
public void erase （String content）{     System.out.println （"Erase "+content）；     }     }
執(zhí)行下列代碼的結(jié)果是哪項(xiàng)？（） 
Pencil pen=new RubberPencil（）；     
pen.write（"Hello"）；     

現(xiàn)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）；     }     } 
執(zhí)行下列代碼的結(jié)果是哪項(xiàng)？（）     
Pencil pen=new RubberPencil（）；     
pen.write （"Hello"）；     
pen.erase （"Hello"）；