複選題
第38題
Given:
1. class One{
2. public One foo(){return this;}
3. }
4. class Two extends One{
5. public One foo(){return this;}
6. }
7. class Three extends Two{
8. //insert method here
9. }
Which two methods, inserted individually, correctly complete the Three class? (Choose two.)
(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;}
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