class One {   public One foo() { return this; }  }  class Two extends One {  public One foo() { return this; }  }  class Three extends Two {   // insert method here  }  Which two methods, inserted individually, correctly complete the Three class?()

A .  public void foo() { } B .  public int foo() { return 3; } C .  public Two foo() { return this; } D .  public One foo() { return this; } E .  public Object foo() { return this; }

时间:2022-10-16 09:03:10 所属题库:SCJP程序员认证考试题库

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